/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 13:03:12,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 13:03:12,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 13:03:12,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 13:03:12,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 13:03:12,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 13:03:12,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 13:03:12,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 13:03:12,799 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 13:03:12,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 13:03:12,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 13:03:12,800 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 13:03:12,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 13:03:12,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 13:03:12,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 13:03:12,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 13:03:12,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 13:03:12,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 13:03:12,801 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 13:03:12,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 13:03:12,802 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 13:03:12,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 13:03:12,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 13:03:12,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 13:03:12,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 13:03:12,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 13:03:12,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:03:12,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 13:03:12,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 13:03:12,803 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 13:03:12,804 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 13:03:12,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 13:03:12,804 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 13:03:12,804 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 13:03:13,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 13:03:13,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 13:03:13,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 13:03:13,051 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 13:03:13,052 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 13:03:13,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-03-20 13:03:13,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ad922a3a/80b761e1027440fc83e7d362bb7b9963/FLAG77c4eae82 [2022-03-20 13:03:13,496 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 13:03:13,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-03-20 13:03:13,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ad922a3a/80b761e1027440fc83e7d362bb7b9963/FLAG77c4eae82 [2022-03-20 13:03:13,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ad922a3a/80b761e1027440fc83e7d362bb7b9963 [2022-03-20 13:03:13,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 13:03:13,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 13:03:13,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 13:03:13,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 13:03:13,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 13:03:13,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:03:13" (1/1) ... [2022-03-20 13:03:13,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eac3bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:03:13, skipping insertion in model container [2022-03-20 13:03:13,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:03:13" (1/1) ... [2022-03-20 13:03:13,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 13:03:13,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 13:03:13,741 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-03-20 13:03:13,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:03:13,764 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 13:03:13,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-03-20 13:03:13,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:03:13,800 INFO L208 MainTranslator]: Completed translation [2022-03-20 13:03:13,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:03:13 WrapperNode [2022-03-20 13:03:13,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 13:03:13,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 13:03:13,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 13:03:13,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 13:03:13,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:03:13" (1/1) ... [2022-03-20 13:03:13,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:03:13" (1/1) ... [2022-03-20 13:03:13,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:03:13" (1/1) ... [2022-03-20 13:03:13,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:03:13" (1/1) ... [2022-03-20 13:03:13,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:03:13" (1/1) ... [2022-03-20 13:03:13,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:03:13" (1/1) ... [2022-03-20 13:03:13,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:03:13" (1/1) ... [2022-03-20 13:03:13,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 13:03:13,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 13:03:13,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 13:03:13,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 13:03:13,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:03:13" (1/1) ... [2022-03-20 13:03:13,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:03:13,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:13,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 13:03:13,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 13:03:13,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 13:03:13,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 13:03:13,929 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 13:03:13,929 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 13:03:13,929 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 13:03:13,930 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 13:03:13,930 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 13:03:13,930 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 13:03:13,930 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 13:03:13,930 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 13:03:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 13:03:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 13:03:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 13:03:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 13:03:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 13:03:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 13:03:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 13:03:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 13:03:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 13:03:13,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 13:03:13,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 13:03:13,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 13:03:14,011 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 13:03:14,012 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 13:03:14,105 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 13:03:14,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 13:03:14,110 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 13:03:14,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:03:14 BoogieIcfgContainer [2022-03-20 13:03:14,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 13:03:14,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 13:03:14,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 13:03:14,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 13:03:14,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:03:13" (1/3) ... [2022-03-20 13:03:14,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68787109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:03:14, skipping insertion in model container [2022-03-20 13:03:14,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:03:13" (2/3) ... [2022-03-20 13:03:14,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68787109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:03:14, skipping insertion in model container [2022-03-20 13:03:14,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:03:14" (3/3) ... [2022-03-20 13:03:14,133 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2022-03-20 13:03:14,137 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 13:03:14,137 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 13:03:14,206 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 13:03:14,232 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 13:03:14,232 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 13:03:14,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:03:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 13:03:14,262 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:14,263 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:14,263 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:14,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:14,267 INFO L85 PathProgramCache]: Analyzing trace with hash -623416428, now seen corresponding path program 1 times [2022-03-20 13:03:14,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:14,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [525877831] [2022-03-20 13:03:14,283 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:14,284 INFO L85 PathProgramCache]: Analyzing trace with hash -623416428, now seen corresponding path program 2 times [2022-03-20 13:03:14,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:14,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725478739] [2022-03-20 13:03:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:14,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:14,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:14,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:14,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725478739] [2022-03-20 13:03:14,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725478739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:14,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:14,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:03:14,464 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:14,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [525877831] [2022-03-20 13:03:14,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [525877831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:14,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:14,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:03:14,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464753756] [2022-03-20 13:03:14,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:14,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 13:03:14,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:14,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 13:03:14,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:03:14,502 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:14,559 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-03-20 13:03:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 13:03:14,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 13:03:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:14,568 INFO L225 Difference]: With dead ends: 43 [2022-03-20 13:03:14,569 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 13:03:14,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:03:14,575 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:14,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:03:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 13:03:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-20 13:03:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-20 13:03:14,615 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2022-03-20 13:03:14,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:14,616 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-20 13:03:14,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:14,617 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-20 13:03:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 13:03:14,619 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:14,619 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:14,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 13:03:14,620 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:14,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1308012743, now seen corresponding path program 1 times [2022-03-20 13:03:14,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:14,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78244439] [2022-03-20 13:03:14,624 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:14,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1308012743, now seen corresponding path program 2 times [2022-03-20 13:03:14,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:14,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13681695] [2022-03-20 13:03:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:14,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:14,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:14,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:14,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13681695] [2022-03-20 13:03:14,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13681695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:14,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:14,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:03:14,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:14,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78244439] [2022-03-20 13:03:14,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78244439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:14,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:14,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:03:14,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624714566] [2022-03-20 13:03:14,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:14,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:03:14,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:14,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:03:14,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:03:14,748 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:14,842 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-03-20 13:03:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:03:14,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 13:03:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:14,844 INFO L225 Difference]: With dead ends: 29 [2022-03-20 13:03:14,844 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 13:03:14,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:03:14,846 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:14,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 13:03:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-03-20 13:03:14,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-03-20 13:03:14,852 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-03-20 13:03:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:14,852 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-03-20 13:03:14,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-03-20 13:03:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 13:03:14,853 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:14,854 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:14,854 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 13:03:14,854 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:14,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:14,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1066675892, now seen corresponding path program 1 times [2022-03-20 13:03:14,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:14,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1748576116] [2022-03-20 13:03:14,856 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1066675892, now seen corresponding path program 2 times [2022-03-20 13:03:14,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:14,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867836217] [2022-03-20 13:03:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:14,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:14,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:14,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:14,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867836217] [2022-03-20 13:03:14,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867836217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:14,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902490026] [2022-03-20 13:03:14,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:14,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:14,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:14,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:03:14,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 13:03:15,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:15,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:15,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 13:03:15,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:15,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:15,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902490026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:15,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:15,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-20 13:03:15,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:15,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1748576116] [2022-03-20 13:03:15,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1748576116] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:15,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:15,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:03:15,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470766844] [2022-03-20 13:03:15,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:15,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:03:15,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:15,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:03:15,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:03:15,218 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:15,315 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-03-20 13:03:15,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:03:15,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 13:03:15,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:15,320 INFO L225 Difference]: With dead ends: 38 [2022-03-20 13:03:15,320 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 13:03:15,322 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:03:15,327 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:15,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:03:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 13:03:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-03-20 13:03:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-03-20 13:03:15,336 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2022-03-20 13:03:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:15,337 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-03-20 13:03:15,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-03-20 13:03:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 13:03:15,337 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:15,338 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:15,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:15,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:15,564 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:15,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1780147345, now seen corresponding path program 3 times [2022-03-20 13:03:15,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:15,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2068960230] [2022-03-20 13:03:15,565 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:15,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1780147345, now seen corresponding path program 4 times [2022-03-20 13:03:15,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:15,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907500494] [2022-03-20 13:03:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:15,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:15,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:15,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:15,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907500494] [2022-03-20 13:03:15,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907500494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:15,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502610848] [2022-03-20 13:03:15,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:15,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:15,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:15,654 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) [2022-03-20 13:03:15,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 13:03:15,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:15,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:15,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:03:15,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:15,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:15,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502610848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:15,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:15,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 13:03:15,877 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:15,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2068960230] [2022-03-20 13:03:15,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2068960230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:15,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:15,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:03:15,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113668072] [2022-03-20 13:03:15,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:15,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:03:15,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:15,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:03:15,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:03:15,887 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:15,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:15,995 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-03-20 13:03:15,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:03:15,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 13:03:15,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:15,996 INFO L225 Difference]: With dead ends: 43 [2022-03-20 13:03:15,996 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 13:03:15,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-20 13:03:15,998 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:15,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 13:03:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-03-20 13:03:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-20 13:03:16,005 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-03-20 13:03:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:16,005 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-20 13:03:16,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-20 13:03:16,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 13:03:16,006 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:16,006 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:16,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:16,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 13:03:16,228 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1683110550, now seen corresponding path program 5 times [2022-03-20 13:03:16,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:16,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [293641787] [2022-03-20 13:03:16,229 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:16,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1683110550, now seen corresponding path program 6 times [2022-03-20 13:03:16,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:16,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573962354] [2022-03-20 13:03:16,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:16,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:16,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:16,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573962354] [2022-03-20 13:03:16,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573962354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110119573] [2022-03-20 13:03:16,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:16,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:16,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:16,327 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) [2022-03-20 13:03:16,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 13:03:16,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 13:03:16,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:16,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 13:03:16,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:16,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:16,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110119573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:16,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:16,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-20 13:03:16,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:16,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [293641787] [2022-03-20 13:03:16,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [293641787] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:16,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:16,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:03:16,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854681298] [2022-03-20 13:03:16,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:16,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:03:16,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:16,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:03:16,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:03:16,573 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:16,693 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-03-20 13:03:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:03:16,694 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 13:03:16,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:16,695 INFO L225 Difference]: With dead ends: 48 [2022-03-20 13:03:16,695 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 13:03:16,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:03:16,697 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:16,697 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 35 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 13:03:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-03-20 13:03:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-03-20 13:03:16,705 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 23 [2022-03-20 13:03:16,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:16,705 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-03-20 13:03:16,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-03-20 13:03:16,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 13:03:16,706 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:16,706 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:16,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:16,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:16,919 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:16,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1374936229, now seen corresponding path program 7 times [2022-03-20 13:03:16,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:16,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [490921293] [2022-03-20 13:03:16,920 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:16,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1374936229, now seen corresponding path program 8 times [2022-03-20 13:03:16,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:16,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103251639] [2022-03-20 13:03:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:16,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:17,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:17,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:17,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103251639] [2022-03-20 13:03:17,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103251639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:17,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558865347] [2022-03-20 13:03:17,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:17,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:17,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:17,038 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) [2022-03-20 13:03:17,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 13:03:17,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:17,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:17,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 13:03:17,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:17,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:17,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558865347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:17,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:17,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 13:03:17,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:17,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [490921293] [2022-03-20 13:03:17,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [490921293] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:17,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:17,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:03:17,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314124979] [2022-03-20 13:03:17,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:17,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:03:17,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:17,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:03:17,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:03:17,292 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:17,430 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-03-20 13:03:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:03:17,430 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-20 13:03:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:17,431 INFO L225 Difference]: With dead ends: 53 [2022-03-20 13:03:17,431 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 13:03:17,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-03-20 13:03:17,432 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:17,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 35 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 13:03:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2022-03-20 13:03:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-03-20 13:03:17,441 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2022-03-20 13:03:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:17,441 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-03-20 13:03:17,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-03-20 13:03:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 13:03:17,442 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:17,442 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:17,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:17,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:17,660 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1894706912, now seen corresponding path program 9 times [2022-03-20 13:03:17,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:17,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1883772608] [2022-03-20 13:03:17,661 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:17,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1894706912, now seen corresponding path program 10 times [2022-03-20 13:03:17,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:17,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582735778] [2022-03-20 13:03:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:17,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:17,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:17,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:17,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582735778] [2022-03-20 13:03:17,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582735778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:17,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590801422] [2022-03-20 13:03:17,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:17,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:17,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:17,764 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) [2022-03-20 13:03:17,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 13:03:17,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:17,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:17,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:03:17,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:17,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:18,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590801422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:18,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:18,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-20 13:03:18,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:18,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1883772608] [2022-03-20 13:03:18,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1883772608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:18,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:18,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:03:18,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878734616] [2022-03-20 13:03:18,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:18,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:03:18,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:18,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:03:18,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-03-20 13:03:18,010 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:18,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:18,164 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2022-03-20 13:03:18,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:03:18,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 13:03:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:18,165 INFO L225 Difference]: With dead ends: 58 [2022-03-20 13:03:18,165 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 13:03:18,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2022-03-20 13:03:18,166 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 74 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:18,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 40 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 13:03:18,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-03-20 13:03:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-03-20 13:03:18,176 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 27 [2022-03-20 13:03:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:18,176 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-03-20 13:03:18,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-03-20 13:03:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 13:03:18,177 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:18,177 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:18,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:18,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:18,400 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:18,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:18,401 INFO L85 PathProgramCache]: Analyzing trace with hash -105704741, now seen corresponding path program 11 times [2022-03-20 13:03:18,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:18,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [424840100] [2022-03-20 13:03:18,401 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:18,402 INFO L85 PathProgramCache]: Analyzing trace with hash -105704741, now seen corresponding path program 12 times [2022-03-20 13:03:18,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:18,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277345654] [2022-03-20 13:03:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:18,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:18,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:18,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:18,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277345654] [2022-03-20 13:03:18,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277345654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:18,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364614173] [2022-03-20 13:03:18,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:18,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:18,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:18,494 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) [2022-03-20 13:03:18,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 13:03:18,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 13:03:18,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:18,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 13:03:18,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:18,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:18,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364614173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:18,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:18,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-20 13:03:18,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:18,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [424840100] [2022-03-20 13:03:18,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [424840100] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:18,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:18,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:03:18,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438956769] [2022-03-20 13:03:18,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:18,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:03:18,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:03:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:03:18,795 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:18,977 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-03-20 13:03:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:03:18,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 13:03:18,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:18,980 INFO L225 Difference]: With dead ends: 63 [2022-03-20 13:03:18,980 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 13:03:18,981 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2022-03-20 13:03:18,982 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:18,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 45 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 13:03:19,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2022-03-20 13:03:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:19,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-03-20 13:03:19,008 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 29 [2022-03-20 13:03:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:19,009 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-03-20 13:03:19,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:19,009 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-03-20 13:03:19,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 13:03:19,012 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:19,012 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:19,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:19,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:19,213 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1138463190, now seen corresponding path program 13 times [2022-03-20 13:03:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:19,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098995409] [2022-03-20 13:03:19,214 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:19,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1138463190, now seen corresponding path program 14 times [2022-03-20 13:03:19,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:19,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340839907] [2022-03-20 13:03:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:19,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:19,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:19,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:19,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340839907] [2022-03-20 13:03:19,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340839907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:19,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033064426] [2022-03-20 13:03:19,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:19,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:19,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:19,322 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) [2022-03-20 13:03:19,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 13:03:19,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:19,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:19,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 13:03:19,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:19,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:19,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033064426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:19,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:19,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-20 13:03:19,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:19,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098995409] [2022-03-20 13:03:19,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098995409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:19,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:19,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:03:19,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107270203] [2022-03-20 13:03:19,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:19,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 13:03:19,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:19,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 13:03:19,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:03:19,642 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:19,861 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-03-20 13:03:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:03:19,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-20 13:03:19,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:19,862 INFO L225 Difference]: With dead ends: 68 [2022-03-20 13:03:19,862 INFO L226 Difference]: Without dead ends: 62 [2022-03-20 13:03:19,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 13:03:19,863 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:19,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 50 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:19,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-20 13:03:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-03-20 13:03:19,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-03-20 13:03:19,873 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 31 [2022-03-20 13:03:19,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:19,873 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-03-20 13:03:19,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-03-20 13:03:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 13:03:19,874 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:19,874 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:19,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:20,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:20,080 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:20,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:20,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1512030703, now seen corresponding path program 15 times [2022-03-20 13:03:20,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:20,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610892663] [2022-03-20 13:03:20,081 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1512030703, now seen corresponding path program 16 times [2022-03-20 13:03:20,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:20,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99609175] [2022-03-20 13:03:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:20,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:20,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:20,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:20,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99609175] [2022-03-20 13:03:20,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99609175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:20,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896190993] [2022-03-20 13:03:20,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:20,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:20,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:20,186 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) [2022-03-20 13:03:20,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 13:03:20,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:20,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:20,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 13:03:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:20,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:20,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896190993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:20,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:20,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 13:03:20,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:20,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610892663] [2022-03-20 13:03:20,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610892663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:20,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:20,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:03:20,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52173043] [2022-03-20 13:03:20,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:20,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:03:20,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:20,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:03:20,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2022-03-20 13:03:20,545 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:20,743 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-03-20 13:03:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 13:03:20,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-20 13:03:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:20,745 INFO L225 Difference]: With dead ends: 73 [2022-03-20 13:03:20,745 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 13:03:20,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=422, Invalid=910, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 13:03:20,746 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:20,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 40 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:20,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 13:03:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-03-20 13:03:20,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-03-20 13:03:20,756 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 33 [2022-03-20 13:03:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:20,756 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-03-20 13:03:20,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:20,756 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-03-20 13:03:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 13:03:20,757 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:20,757 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:20,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:20,967 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,SelfDestructingSolverStorable9 [2022-03-20 13:03:20,967 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:20,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:20,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1721055348, now seen corresponding path program 17 times [2022-03-20 13:03:20,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:20,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1242109935] [2022-03-20 13:03:20,968 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:20,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1721055348, now seen corresponding path program 18 times [2022-03-20 13:03:20,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:20,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170846452] [2022-03-20 13:03:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:20,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:21,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:21,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:21,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170846452] [2022-03-20 13:03:21,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170846452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:21,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101163972] [2022-03-20 13:03:21,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:21,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:21,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:21,100 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) [2022-03-20 13:03:21,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 13:03:21,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 13:03:21,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:21,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 13:03:21,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:21,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:21,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101163972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:21,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:21,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-20 13:03:21,464 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:21,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1242109935] [2022-03-20 13:03:21,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1242109935] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:21,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:21,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 13:03:21,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792903570] [2022-03-20 13:03:21,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:21,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 13:03:21,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:21,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 13:03:21,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2022-03-20 13:03:21,466 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:21,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:21,695 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2022-03-20 13:03:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 13:03:21,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 13:03:21,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:21,696 INFO L225 Difference]: With dead ends: 78 [2022-03-20 13:03:21,696 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 13:03:21,697 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=506, Invalid=1054, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 13:03:21,697 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:21,698 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 40 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 13:03:21,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2022-03-20 13:03:21,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:21,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-03-20 13:03:21,710 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 35 [2022-03-20 13:03:21,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:21,711 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-03-20 13:03:21,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:21,711 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-03-20 13:03:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 13:03:21,715 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:21,715 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:21,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:21,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:21,938 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:21,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:21,939 INFO L85 PathProgramCache]: Analyzing trace with hash -730276281, now seen corresponding path program 19 times [2022-03-20 13:03:21,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:21,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [669869318] [2022-03-20 13:03:21,940 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:21,940 INFO L85 PathProgramCache]: Analyzing trace with hash -730276281, now seen corresponding path program 20 times [2022-03-20 13:03:21,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:21,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819320862] [2022-03-20 13:03:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:21,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:22,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:22,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:22,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819320862] [2022-03-20 13:03:22,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819320862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:22,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344746837] [2022-03-20 13:03:22,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:22,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:22,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:22,058 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) [2022-03-20 13:03:22,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 13:03:22,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:22,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:22,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 13:03:22,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:22,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:22,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344746837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:22,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:22,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-20 13:03:22,450 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:22,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [669869318] [2022-03-20 13:03:22,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [669869318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:22,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:22,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:03:22,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148977471] [2022-03-20 13:03:22,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:22,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:03:22,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:22,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:03:22,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-03-20 13:03:22,452 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:22,689 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2022-03-20 13:03:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:03:22,689 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-20 13:03:22,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:22,690 INFO L225 Difference]: With dead ends: 83 [2022-03-20 13:03:22,690 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 13:03:22,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=598, Invalid=1208, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 13:03:22,691 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 139 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:22,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 35 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:22,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 13:03:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-03-20 13:03:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-03-20 13:03:22,702 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 37 [2022-03-20 13:03:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:22,703 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-03-20 13:03:22,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:22,703 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-03-20 13:03:22,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 13:03:22,703 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:22,703 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:22,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:22,919 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,SelfDestructingSolverStorable11 [2022-03-20 13:03:22,919 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:22,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:22,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2074332606, now seen corresponding path program 21 times [2022-03-20 13:03:22,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:22,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [673511790] [2022-03-20 13:03:22,921 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:22,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2074332606, now seen corresponding path program 22 times [2022-03-20 13:03:22,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:22,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818222412] [2022-03-20 13:03:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:22,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:23,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:23,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:23,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818222412] [2022-03-20 13:03:23,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818222412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:23,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022768164] [2022-03-20 13:03:23,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:23,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:23,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:23,072 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) [2022-03-20 13:03:23,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 13:03:23,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:23,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:23,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 13:03:23,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:23,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:23,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022768164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:23,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:23,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-20 13:03:23,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:23,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [673511790] [2022-03-20 13:03:23,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [673511790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:23,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:23,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:03:23,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926236723] [2022-03-20 13:03:23,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:23,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:03:23,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:03:23,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2022-03-20 13:03:23,465 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:23,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:23,707 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2022-03-20 13:03:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:03:23,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-20 13:03:23,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:23,708 INFO L225 Difference]: With dead ends: 88 [2022-03-20 13:03:23,708 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 13:03:23,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=698, Invalid=1372, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 13:03:23,709 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 152 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:23,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 40 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:23,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 13:03:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2022-03-20 13:03:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-03-20 13:03:23,722 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 39 [2022-03-20 13:03:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:23,722 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-03-20 13:03:23,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-03-20 13:03:23,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 13:03:23,723 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:23,723 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:23,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 13:03:23,927 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,SelfDestructingSolverStorable12 [2022-03-20 13:03:23,928 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:23,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:23,928 INFO L85 PathProgramCache]: Analyzing trace with hash -927304835, now seen corresponding path program 23 times [2022-03-20 13:03:23,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:23,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051215631] [2022-03-20 13:03:23,929 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash -927304835, now seen corresponding path program 24 times [2022-03-20 13:03:23,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:23,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663295750] [2022-03-20 13:03:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:23,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:24,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:24,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:24,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663295750] [2022-03-20 13:03:24,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663295750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:24,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934632519] [2022-03-20 13:03:24,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:24,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:24,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:24,067 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) [2022-03-20 13:03:24,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 13:03:24,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 13:03:24,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:24,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 13:03:24,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:24,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:24,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934632519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:24,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:24,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-20 13:03:24,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:24,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051215631] [2022-03-20 13:03:24,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051215631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:24,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:24,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 13:03:24,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226526663] [2022-03-20 13:03:24,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:24,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 13:03:24,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 13:03:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=704, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 13:03:24,519 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:24,777 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2022-03-20 13:03:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 13:03:24,777 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-20 13:03:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:24,778 INFO L225 Difference]: With dead ends: 93 [2022-03-20 13:03:24,778 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 13:03:24,779 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=806, Invalid=1546, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 13:03:24,779 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 177 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:24,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 40 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:24,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 13:03:24,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2022-03-20 13:03:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 75 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2022-03-20 13:03:24,790 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 41 [2022-03-20 13:03:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:24,790 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2022-03-20 13:03:24,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2022-03-20 13:03:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 13:03:24,791 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:24,791 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:24,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 13:03:25,014 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,SelfDestructingSolverStorable13 [2022-03-20 13:03:25,014 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:25,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1854755320, now seen corresponding path program 25 times [2022-03-20 13:03:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:25,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015122182] [2022-03-20 13:03:25,015 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1854755320, now seen corresponding path program 26 times [2022-03-20 13:03:25,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:25,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061379259] [2022-03-20 13:03:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:25,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:25,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:25,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061379259] [2022-03-20 13:03:25,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061379259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:25,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802678133] [2022-03-20 13:03:25,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:25,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:25,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:25,184 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) [2022-03-20 13:03:25,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 13:03:25,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:25,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:25,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 13:03:25,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:25,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:25,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802678133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:25,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:25,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-20 13:03:25,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:25,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015122182] [2022-03-20 13:03:25,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015122182] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:25,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:25,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 13:03:25,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506945574] [2022-03-20 13:03:25,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:25,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 13:03:25,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 13:03:25,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 13:03:25,670 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:25,970 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2022-03-20 13:03:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 13:03:25,971 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-20 13:03:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:25,972 INFO L225 Difference]: With dead ends: 98 [2022-03-20 13:03:25,972 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 13:03:25,973 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=922, Invalid=1730, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 13:03:25,973 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 172 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:25,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 40 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 13:03:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2022-03-20 13:03:25,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.1875) internal successors, (95), 80 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-03-20 13:03:25,987 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 43 [2022-03-20 13:03:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:25,988 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-03-20 13:03:25,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-03-20 13:03:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 13:03:25,988 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:25,989 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:26,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:26,199 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,SelfDestructingSolverStorable14 [2022-03-20 13:03:26,199 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:26,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:26,200 INFO L85 PathProgramCache]: Analyzing trace with hash -350061133, now seen corresponding path program 27 times [2022-03-20 13:03:26,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:26,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [838611139] [2022-03-20 13:03:26,200 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:26,200 INFO L85 PathProgramCache]: Analyzing trace with hash -350061133, now seen corresponding path program 28 times [2022-03-20 13:03:26,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:26,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981004575] [2022-03-20 13:03:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:26,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:26,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:26,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:26,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981004575] [2022-03-20 13:03:26,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981004575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:26,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623375370] [2022-03-20 13:03:26,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:26,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:26,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:26,356 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) [2022-03-20 13:03:26,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 13:03:26,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:26,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:26,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 13:03:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:26,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:26,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623375370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:26,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:26,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-20 13:03:26,826 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [838611139] [2022-03-20 13:03:26,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [838611139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:26,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:26,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 13:03:26,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026630531] [2022-03-20 13:03:26,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:26,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 13:03:26,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:26,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 13:03:26,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=866, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 13:03:26,827 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:27,172 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2022-03-20 13:03:27,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 13:03:27,172 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-20 13:03:27,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:27,173 INFO L225 Difference]: With dead ends: 103 [2022-03-20 13:03:27,173 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 13:03:27,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1046, Invalid=1924, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 13:03:27,175 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 200 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:27,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 40 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 13:03:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2022-03-20 13:03:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.188235294117647) internal successors, (101), 85 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-03-20 13:03:27,193 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 45 [2022-03-20 13:03:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:27,193 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-03-20 13:03:27,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:27,193 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-03-20 13:03:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 13:03:27,194 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:27,194 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:27,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:27,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:27,408 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:27,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1759795538, now seen corresponding path program 29 times [2022-03-20 13:03:27,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:27,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [877422963] [2022-03-20 13:03:27,409 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1759795538, now seen corresponding path program 30 times [2022-03-20 13:03:27,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:27,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523378086] [2022-03-20 13:03:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:27,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:27,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:27,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:27,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523378086] [2022-03-20 13:03:27,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523378086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:27,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048809003] [2022-03-20 13:03:27,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:27,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:27,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:27,573 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) [2022-03-20 13:03:27,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 13:03:27,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 13:03:27,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:27,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 13:03:27,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:27,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:28,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048809003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:28,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:28,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-20 13:03:28,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:28,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [877422963] [2022-03-20 13:03:28,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [877422963] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:28,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:28,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 13:03:28,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33333881] [2022-03-20 13:03:28,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:28,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 13:03:28,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:28,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 13:03:28,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=953, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 13:03:28,103 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:28,444 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2022-03-20 13:03:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 13:03:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-20 13:03:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:28,445 INFO L225 Difference]: With dead ends: 108 [2022-03-20 13:03:28,445 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 13:03:28,446 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1178, Invalid=2128, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 13:03:28,446 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 171 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:28,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 55 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 13:03:28,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2022-03-20 13:03:28,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 90 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:28,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-03-20 13:03:28,460 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 47 [2022-03-20 13:03:28,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:28,460 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-03-20 13:03:28,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-03-20 13:03:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 13:03:28,460 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:28,461 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:28,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 13:03:28,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 13:03:28,661 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash 695106793, now seen corresponding path program 31 times [2022-03-20 13:03:28,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:28,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [689066500] [2022-03-20 13:03:28,662 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:28,662 INFO L85 PathProgramCache]: Analyzing trace with hash 695106793, now seen corresponding path program 32 times [2022-03-20 13:03:28,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:28,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273336580] [2022-03-20 13:03:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:28,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:28,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:28,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:28,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273336580] [2022-03-20 13:03:28,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273336580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:28,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127716918] [2022-03-20 13:03:28,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:28,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:28,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:28,836 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) [2022-03-20 13:03:28,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 13:03:28,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:28,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:28,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 13:03:28,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:28,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:29,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127716918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:29,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:29,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-20 13:03:29,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:29,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [689066500] [2022-03-20 13:03:29,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [689066500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:29,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:29,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 13:03:29,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872928105] [2022-03-20 13:03:29,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:29,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 13:03:29,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:29,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 13:03:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=1044, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 13:03:29,427 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:29,769 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2022-03-20 13:03:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 13:03:29,769 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-03-20 13:03:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:29,770 INFO L225 Difference]: With dead ends: 113 [2022-03-20 13:03:29,770 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 13:03:29,771 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1318, Invalid=2342, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 13:03:29,771 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 196 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:29,771 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 50 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 13:03:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2022-03-20 13:03:29,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 95 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-03-20 13:03:29,795 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 49 [2022-03-20 13:03:29,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:29,796 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-03-20 13:03:29,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:29,796 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-03-20 13:03:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 13:03:29,796 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:29,796 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:29,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:29,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 13:03:29,997 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:29,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:29,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1919201380, now seen corresponding path program 33 times [2022-03-20 13:03:29,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:29,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [640173994] [2022-03-20 13:03:29,998 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:29,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1919201380, now seen corresponding path program 34 times [2022-03-20 13:03:29,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:29,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064347374] [2022-03-20 13:03:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:29,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:30,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:30,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:30,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064347374] [2022-03-20 13:03:30,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064347374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:30,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231945215] [2022-03-20 13:03:30,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:30,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:30,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:30,216 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) [2022-03-20 13:03:30,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 13:03:30,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:30,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:30,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 13:03:30,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:30,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:30,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231945215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:30,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:30,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-20 13:03:30,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:30,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [640173994] [2022-03-20 13:03:30,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [640173994] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:30,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:30,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 13:03:30,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334244809] [2022-03-20 13:03:30,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:30,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 13:03:30,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:30,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 13:03:30,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=1139, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 13:03:30,819 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:31,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:31,201 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2022-03-20 13:03:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 13:03:31,201 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-20 13:03:31,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:31,202 INFO L225 Difference]: With dead ends: 118 [2022-03-20 13:03:31,202 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 13:03:31,203 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1466, Invalid=2566, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 13:03:31,204 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 212 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:31,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 45 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 13:03:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2022-03-20 13:03:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.19) internal successors, (119), 100 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2022-03-20 13:03:31,220 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 51 [2022-03-20 13:03:31,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:31,220 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2022-03-20 13:03:31,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2022-03-20 13:03:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 13:03:31,220 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:31,220 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:31,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-20 13:03:31,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:31,421 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:31,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:31,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1453060383, now seen corresponding path program 35 times [2022-03-20 13:03:31,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:31,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [386328430] [2022-03-20 13:03:31,422 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:31,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1453060383, now seen corresponding path program 36 times [2022-03-20 13:03:31,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:31,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371578387] [2022-03-20 13:03:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:31,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:31,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:31,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:31,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371578387] [2022-03-20 13:03:31,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371578387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:31,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981447461] [2022-03-20 13:03:31,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:31,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:31,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:31,640 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) [2022-03-20 13:03:31,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 13:03:31,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 13:03:31,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:31,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 13:03:31,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:31,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:32,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981447461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:32,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:32,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-20 13:03:32,286 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:32,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [386328430] [2022-03-20 13:03:32,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [386328430] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:32,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:32,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 13:03:32,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76163325] [2022-03-20 13:03:32,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:32,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 13:03:32,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:32,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 13:03:32,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=832, Invalid=1238, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 13:03:32,287 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:32,664 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2022-03-20 13:03:32,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 13:03:32,664 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-20 13:03:32,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:32,665 INFO L225 Difference]: With dead ends: 123 [2022-03-20 13:03:32,665 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 13:03:32,666 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1622, Invalid=2800, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 13:03:32,667 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 252 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:32,667 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 35 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 13:03:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2022-03-20 13:03:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 105 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2022-03-20 13:03:32,685 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 53 [2022-03-20 13:03:32,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:32,685 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2022-03-20 13:03:32,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2022-03-20 13:03:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 13:03:32,686 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:32,686 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:32,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-20 13:03:32,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:32,887 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:32,887 INFO L85 PathProgramCache]: Analyzing trace with hash 168161050, now seen corresponding path program 37 times [2022-03-20 13:03:32,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:32,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1877725541] [2022-03-20 13:03:32,888 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:32,888 INFO L85 PathProgramCache]: Analyzing trace with hash 168161050, now seen corresponding path program 38 times [2022-03-20 13:03:32,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:32,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397967335] [2022-03-20 13:03:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:32,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:33,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:33,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:33,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397967335] [2022-03-20 13:03:33,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397967335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:33,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642265713] [2022-03-20 13:03:33,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:33,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:33,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:33,116 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) [2022-03-20 13:03:33,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 13:03:33,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:33,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:33,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 13:03:33,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:33,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:33,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642265713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:33,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:33,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-03-20 13:03:33,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:33,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1877725541] [2022-03-20 13:03:33,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1877725541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:33,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:33,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:03:33,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092830854] [2022-03-20 13:03:33,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:33,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 13:03:33,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 13:03:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=1341, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 13:03:33,796 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:34,249 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2022-03-20 13:03:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 13:03:34,250 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-20 13:03:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:34,250 INFO L225 Difference]: With dead ends: 128 [2022-03-20 13:03:34,250 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 13:03:34,252 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1786, Invalid=3044, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 13:03:34,253 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 247 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:34,253 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 40 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:03:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 13:03:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2022-03-20 13:03:34,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:34,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2022-03-20 13:03:34,294 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 55 [2022-03-20 13:03:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:34,294 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2022-03-20 13:03:34,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:34,295 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2022-03-20 13:03:34,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 13:03:34,295 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:34,295 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:34,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:34,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:34,511 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:34,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:34,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1964484011, now seen corresponding path program 39 times [2022-03-20 13:03:34,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:34,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [983894359] [2022-03-20 13:03:34,512 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1964484011, now seen corresponding path program 40 times [2022-03-20 13:03:34,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:34,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808246641] [2022-03-20 13:03:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:34,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:34,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:34,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:34,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808246641] [2022-03-20 13:03:34,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808246641] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:34,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606903027] [2022-03-20 13:03:34,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:34,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:34,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:34,767 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) [2022-03-20 13:03:34,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 13:03:34,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:34,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:34,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 13:03:34,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:34,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:35,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606903027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:35,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:35,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-20 13:03:35,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:35,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [983894359] [2022-03-20 13:03:35,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [983894359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:35,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:35,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 13:03:35,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700643151] [2022-03-20 13:03:35,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:35,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 13:03:35,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:35,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 13:03:35,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=1448, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 13:03:35,481 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:35,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:35,923 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2022-03-20 13:03:35,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 13:03:35,923 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-03-20 13:03:35,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:35,924 INFO L225 Difference]: With dead ends: 133 [2022-03-20 13:03:35,924 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 13:03:35,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1958, Invalid=3298, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 13:03:35,925 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 269 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:35,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 40 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 13:03:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2022-03-20 13:03:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.191304347826087) internal successors, (137), 115 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2022-03-20 13:03:35,948 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 57 [2022-03-20 13:03:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:35,948 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2022-03-20 13:03:35,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2022-03-20 13:03:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 13:03:35,949 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:35,949 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:35,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:36,151 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,SelfDestructingSolverStorable21 [2022-03-20 13:03:36,152 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1557979856, now seen corresponding path program 41 times [2022-03-20 13:03:36,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:36,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [352808088] [2022-03-20 13:03:36,153 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:36,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1557979856, now seen corresponding path program 42 times [2022-03-20 13:03:36,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:36,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808194832] [2022-03-20 13:03:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:36,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:36,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:36,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:36,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808194832] [2022-03-20 13:03:36,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808194832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:36,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312095110] [2022-03-20 13:03:36,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:36,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:36,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:36,404 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) [2022-03-20 13:03:36,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 13:03:36,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 13:03:36,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:36,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 13:03:36,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:36,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:37,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312095110] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:37,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:37,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-03-20 13:03:37,211 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [352808088] [2022-03-20 13:03:37,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [352808088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:37,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:37,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 13:03:37,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873553143] [2022-03-20 13:03:37,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:37,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 13:03:37,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 13:03:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1093, Invalid=1559, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 13:03:37,212 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:37,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:37,665 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2022-03-20 13:03:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 13:03:37,665 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-20 13:03:37,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:37,666 INFO L225 Difference]: With dead ends: 138 [2022-03-20 13:03:37,666 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 13:03:37,667 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2138, Invalid=3562, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 13:03:37,667 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 321 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:37,667 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 40 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:03:37,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 13:03:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2022-03-20 13:03:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 120 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2022-03-20 13:03:37,687 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 59 [2022-03-20 13:03:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:37,688 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2022-03-20 13:03:37,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2022-03-20 13:03:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 13:03:37,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:37,688 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:37,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 13:03:37,888 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,SelfDestructingSolverStorable22 [2022-03-20 13:03:37,889 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:37,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2083440501, now seen corresponding path program 43 times [2022-03-20 13:03:37,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:37,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1875111019] [2022-03-20 13:03:37,890 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:37,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2083440501, now seen corresponding path program 44 times [2022-03-20 13:03:37,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:37,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231160372] [2022-03-20 13:03:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:37,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:38,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:38,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:38,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231160372] [2022-03-20 13:03:38,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231160372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:38,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944462647] [2022-03-20 13:03:38,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:38,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:38,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:38,186 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) [2022-03-20 13:03:38,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 13:03:38,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:38,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:38,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 13:03:38,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:38,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:39,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944462647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:39,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:39,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-20 13:03:39,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:39,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1875111019] [2022-03-20 13:03:39,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1875111019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:39,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:39,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 13:03:39,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76835927] [2022-03-20 13:03:39,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:39,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 13:03:39,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:39,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 13:03:39,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=1674, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 13:03:39,121 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:39,655 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2022-03-20 13:03:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 13:03:39,656 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-20 13:03:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:39,657 INFO L225 Difference]: With dead ends: 143 [2022-03-20 13:03:39,657 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 13:03:39,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2326, Invalid=3836, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 13:03:39,658 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 343 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:39,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 45 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:03:39,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 13:03:39,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2022-03-20 13:03:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.192) internal successors, (149), 125 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:39,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 153 transitions. [2022-03-20 13:03:39,684 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 153 transitions. Word has length 61 [2022-03-20 13:03:39,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:39,685 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 153 transitions. [2022-03-20 13:03:39,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 153 transitions. [2022-03-20 13:03:39,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 13:03:39,686 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:39,686 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:39,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 13:03:39,905 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:39,905 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:39,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1090057338, now seen corresponding path program 45 times [2022-03-20 13:03:39,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:39,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [741124278] [2022-03-20 13:03:39,906 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:39,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1090057338, now seen corresponding path program 46 times [2022-03-20 13:03:39,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:39,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627072795] [2022-03-20 13:03:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:39,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:40,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:40,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:40,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627072795] [2022-03-20 13:03:40,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627072795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:40,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404492991] [2022-03-20 13:03:40,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:40,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:40,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:40,234 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) [2022-03-20 13:03:40,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 13:03:40,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:40,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:40,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 13:03:40,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:40,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:41,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404492991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:41,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:41,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-20 13:03:41,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:41,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [741124278] [2022-03-20 13:03:41,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [741124278] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:41,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:41,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 13:03:41,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338482386] [2022-03-20 13:03:41,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:41,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 13:03:41,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:41,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 13:03:41,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1287, Invalid=1793, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 13:03:41,239 INFO L87 Difference]: Start difference. First operand 130 states and 153 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:41,800 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2022-03-20 13:03:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 13:03:41,800 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-03-20 13:03:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:41,801 INFO L225 Difference]: With dead ends: 148 [2022-03-20 13:03:41,801 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 13:03:41,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2522, Invalid=4120, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 13:03:41,802 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 326 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:41,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 30 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:03:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 13:03:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2022-03-20 13:03:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 130 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2022-03-20 13:03:41,826 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 63 [2022-03-20 13:03:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:41,827 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2022-03-20 13:03:41,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2022-03-20 13:03:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 13:03:41,827 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:41,827 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:41,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 13:03:42,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:42,035 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:42,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:42,035 INFO L85 PathProgramCache]: Analyzing trace with hash 68422593, now seen corresponding path program 47 times [2022-03-20 13:03:42,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:42,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1884527891] [2022-03-20 13:03:42,036 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:42,036 INFO L85 PathProgramCache]: Analyzing trace with hash 68422593, now seen corresponding path program 48 times [2022-03-20 13:03:42,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:42,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837502347] [2022-03-20 13:03:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:42,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:42,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:42,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837502347] [2022-03-20 13:03:42,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837502347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356818065] [2022-03-20 13:03:42,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:42,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:42,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:42,382 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) [2022-03-20 13:03:42,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 13:03:42,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 13:03:42,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:42,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 13:03:42,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:42,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:43,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356818065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:43,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:43,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-03-20 13:03:43,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:43,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1884527891] [2022-03-20 13:03:43,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1884527891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:43,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:43,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 13:03:43,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796438633] [2022-03-20 13:03:43,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:43,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 13:03:43,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:43,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 13:03:43,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1390, Invalid=1916, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 13:03:43,304 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:43,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:43,841 INFO L93 Difference]: Finished difference Result 153 states and 179 transitions. [2022-03-20 13:03:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 13:03:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-20 13:03:43,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:43,842 INFO L225 Difference]: With dead ends: 153 [2022-03-20 13:03:43,842 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 13:03:43,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2726, Invalid=4414, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 13:03:43,844 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 330 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:43,844 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 45 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:03:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 13:03:43,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2022-03-20 13:03:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 135 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2022-03-20 13:03:43,877 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 65 [2022-03-20 13:03:43,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:43,877 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2022-03-20 13:03:43,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:43,877 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2022-03-20 13:03:43,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 13:03:43,878 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:43,878 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:43,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:44,087 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,SelfDestructingSolverStorable25 [2022-03-20 13:03:44,087 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:44,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:44,087 INFO L85 PathProgramCache]: Analyzing trace with hash 971106620, now seen corresponding path program 49 times [2022-03-20 13:03:44,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:44,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [443358644] [2022-03-20 13:03:44,088 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:44,088 INFO L85 PathProgramCache]: Analyzing trace with hash 971106620, now seen corresponding path program 50 times [2022-03-20 13:03:44,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:44,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373179682] [2022-03-20 13:03:44,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:44,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:44,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:44,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:44,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373179682] [2022-03-20 13:03:44,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373179682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:44,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067782832] [2022-03-20 13:03:44,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:44,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:44,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:44,440 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) [2022-03-20 13:03:44,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 13:03:44,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:44,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:44,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 13:03:44,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:44,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:45,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067782832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:45,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:45,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-03-20 13:03:45,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:45,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [443358644] [2022-03-20 13:03:45,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [443358644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:45,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:45,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 13:03:45,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158530711] [2022-03-20 13:03:45,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:45,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 13:03:45,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:45,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 13:03:45,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2043, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 13:03:45,514 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:46,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:46,086 INFO L93 Difference]: Finished difference Result 158 states and 185 transitions. [2022-03-20 13:03:46,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 13:03:46,087 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-03-20 13:03:46,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:46,087 INFO L225 Difference]: With dead ends: 158 [2022-03-20 13:03:46,087 INFO L226 Difference]: Without dead ends: 152 [2022-03-20 13:03:46,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2938, Invalid=4718, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 13:03:46,089 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 337 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:46,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 40 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:03:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-20 13:03:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2022-03-20 13:03:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 140 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 171 transitions. [2022-03-20 13:03:46,127 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 171 transitions. Word has length 67 [2022-03-20 13:03:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:46,127 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 171 transitions. [2022-03-20 13:03:46,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 171 transitions. [2022-03-20 13:03:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 13:03:46,128 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:46,128 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:46,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-20 13:03:46,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 13:03:46,329 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:46,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:46,329 INFO L85 PathProgramCache]: Analyzing trace with hash 867062775, now seen corresponding path program 51 times [2022-03-20 13:03:46,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:46,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2116408257] [2022-03-20 13:03:46,330 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash 867062775, now seen corresponding path program 52 times [2022-03-20 13:03:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:46,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901925781] [2022-03-20 13:03:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:46,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:46,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:46,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:46,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901925781] [2022-03-20 13:03:46,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901925781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:46,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648676071] [2022-03-20 13:03:46,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:46,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:46,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:46,704 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) [2022-03-20 13:03:46,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 13:03:46,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:46,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:46,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 13:03:46,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:46,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:47,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648676071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:47,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:47,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-20 13:03:47,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:47,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2116408257] [2022-03-20 13:03:47,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2116408257] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:47,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:47,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 13:03:47,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246512517] [2022-03-20 13:03:47,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:47,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 13:03:47,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:47,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 13:03:47,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1608, Invalid=2174, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 13:03:47,784 INFO L87 Difference]: Start difference. First operand 145 states and 171 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:48,470 INFO L93 Difference]: Finished difference Result 163 states and 191 transitions. [2022-03-20 13:03:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 13:03:48,470 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-20 13:03:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:48,471 INFO L225 Difference]: With dead ends: 163 [2022-03-20 13:03:48,471 INFO L226 Difference]: Without dead ends: 157 [2022-03-20 13:03:48,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3158, Invalid=5032, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 13:03:48,472 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 326 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:48,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 55 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:03:48,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-20 13:03:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 150. [2022-03-20 13:03:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.193103448275862) internal successors, (173), 145 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2022-03-20 13:03:48,507 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 69 [2022-03-20 13:03:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:48,507 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2022-03-20 13:03:48,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2022-03-20 13:03:48,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 13:03:48,508 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:48,508 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:48,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:48,730 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,SelfDestructingSolverStorable27 [2022-03-20 13:03:48,731 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash -334824462, now seen corresponding path program 53 times [2022-03-20 13:03:48,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:48,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1704708160] [2022-03-20 13:03:48,731 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:48,732 INFO L85 PathProgramCache]: Analyzing trace with hash -334824462, now seen corresponding path program 54 times [2022-03-20 13:03:48,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:48,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122173322] [2022-03-20 13:03:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:48,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:49,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:49,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:49,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122173322] [2022-03-20 13:03:49,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122173322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:49,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29261169] [2022-03-20 13:03:49,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:49,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:49,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:49,083 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) [2022-03-20 13:03:49,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 13:03:49,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-20 13:03:49,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:49,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 13:03:49,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:49,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:50,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29261169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:50,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:50,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-20 13:03:50,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:50,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1704708160] [2022-03-20 13:03:50,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1704708160] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:50,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:50,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 13:03:50,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105520762] [2022-03-20 13:03:50,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:50,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 13:03:50,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:50,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 13:03:50,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1723, Invalid=2309, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 13:03:50,203 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:50,868 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2022-03-20 13:03:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 13:03:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-20 13:03:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:50,869 INFO L225 Difference]: With dead ends: 168 [2022-03-20 13:03:50,869 INFO L226 Difference]: Without dead ends: 162 [2022-03-20 13:03:50,870 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3386, Invalid=5356, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 13:03:50,870 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 339 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:50,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 55 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:03:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-20 13:03:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2022-03-20 13:03:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 150 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2022-03-20 13:03:50,903 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 71 [2022-03-20 13:03:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:50,904 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2022-03-20 13:03:50,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2022-03-20 13:03:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 13:03:50,904 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:50,904 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:50,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 13:03:51,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 13:03:51,122 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:51,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:51,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2256595, now seen corresponding path program 55 times [2022-03-20 13:03:51,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:51,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113893947] [2022-03-20 13:03:51,122 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:51,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2256595, now seen corresponding path program 56 times [2022-03-20 13:03:51,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:51,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703686248] [2022-03-20 13:03:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:51,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:51,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:51,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:51,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703686248] [2022-03-20 13:03:51,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703686248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:51,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913957886] [2022-03-20 13:03:51,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:51,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:51,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:51,478 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) [2022-03-20 13:03:51,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 13:03:51,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:51,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 13:03:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:51,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:52,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913957886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:52,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:52,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-20 13:03:52,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:52,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113893947] [2022-03-20 13:03:52,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113893947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:52,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:52,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 13:03:52,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460957223] [2022-03-20 13:03:52,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:52,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 13:03:52,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 13:03:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1842, Invalid=2448, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 13:03:52,631 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:53,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:53,429 INFO L93 Difference]: Finished difference Result 173 states and 203 transitions. [2022-03-20 13:03:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 13:03:53,429 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-03-20 13:03:53,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:53,430 INFO L225 Difference]: With dead ends: 173 [2022-03-20 13:03:53,430 INFO L226 Difference]: Without dead ends: 167 [2022-03-20 13:03:53,431 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3622, Invalid=5690, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 13:03:53,432 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 379 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:53,432 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 50 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:03:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-20 13:03:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2022-03-20 13:03:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.1935483870967742) internal successors, (185), 155 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 189 transitions. [2022-03-20 13:03:53,481 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 189 transitions. Word has length 73 [2022-03-20 13:03:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:53,482 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 189 transitions. [2022-03-20 13:03:53,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 189 transitions. [2022-03-20 13:03:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 13:03:53,483 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:53,483 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:53,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:53,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:53,698 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1767883688, now seen corresponding path program 57 times [2022-03-20 13:03:53,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:53,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1392305242] [2022-03-20 13:03:53,699 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:53,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1767883688, now seen corresponding path program 58 times [2022-03-20 13:03:53,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:53,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736257821] [2022-03-20 13:03:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:53,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:54,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:54,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736257821] [2022-03-20 13:03:54,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736257821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:54,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832836587] [2022-03-20 13:03:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:54,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:54,152 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) [2022-03-20 13:03:54,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 13:03:54,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:54,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:54,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 13:03:54,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:54,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:55,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832836587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:55,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:55,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-20 13:03:55,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:55,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1392305242] [2022-03-20 13:03:55,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1392305242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:55,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:55,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 13:03:55,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217983548] [2022-03-20 13:03:55,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:55,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 13:03:55,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:55,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 13:03:55,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1965, Invalid=2591, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 13:03:55,383 INFO L87 Difference]: Start difference. First operand 160 states and 189 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:56,183 INFO L93 Difference]: Finished difference Result 178 states and 209 transitions. [2022-03-20 13:03:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 13:03:56,184 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-03-20 13:03:56,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:56,185 INFO L225 Difference]: With dead ends: 178 [2022-03-20 13:03:56,185 INFO L226 Difference]: Without dead ends: 172 [2022-03-20 13:03:56,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3866, Invalid=6034, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 13:03:56,186 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 371 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:56,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 60 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:03:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-20 13:03:56,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2022-03-20 13:03:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.19375) internal successors, (191), 160 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 195 transitions. [2022-03-20 13:03:56,227 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 195 transitions. Word has length 75 [2022-03-20 13:03:56,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:56,228 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 195 transitions. [2022-03-20 13:03:56,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 195 transitions. [2022-03-20 13:03:56,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 13:03:56,229 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:56,229 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:56,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-20 13:03:56,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:56,436 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:56,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:56,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2065646435, now seen corresponding path program 59 times [2022-03-20 13:03:56,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:56,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1454454958] [2022-03-20 13:03:56,437 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:56,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2065646435, now seen corresponding path program 60 times [2022-03-20 13:03:56,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:56,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537222700] [2022-03-20 13:03:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:56,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:56,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:56,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:56,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537222700] [2022-03-20 13:03:56,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537222700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:56,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077693290] [2022-03-20 13:03:56,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:56,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:56,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:56,852 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) [2022-03-20 13:03:56,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 13:03:56,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-20 13:03:56,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:56,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 13:03:56,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:57,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:58,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077693290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:58,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:58,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-20 13:03:58,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:58,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1454454958] [2022-03-20 13:03:58,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1454454958] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:58,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:58,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 13:03:58,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273390535] [2022-03-20 13:03:58,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:58,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 13:03:58,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:58,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 13:03:58,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2092, Invalid=2738, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 13:03:58,188 INFO L87 Difference]: Start difference. First operand 165 states and 195 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:58,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:58,925 INFO L93 Difference]: Finished difference Result 183 states and 215 transitions. [2022-03-20 13:03:58,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 13:03:58,925 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-20 13:03:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:58,926 INFO L225 Difference]: With dead ends: 183 [2022-03-20 13:03:58,926 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 13:03:58,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4118, Invalid=6388, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 13:03:58,927 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 441 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:58,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 35 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:03:58,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 13:03:58,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2022-03-20 13:03:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.1939393939393939) internal successors, (197), 165 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 201 transitions. [2022-03-20 13:03:58,981 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 201 transitions. Word has length 77 [2022-03-20 13:03:58,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:58,981 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 201 transitions. [2022-03-20 13:03:58,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:03:58,981 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 201 transitions. [2022-03-20 13:03:58,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 13:03:58,982 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:58,982 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:59,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-20 13:03:59,187 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,SelfDestructingSolverStorable31 [2022-03-20 13:03:59,187 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:59,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:59,187 INFO L85 PathProgramCache]: Analyzing trace with hash 452837470, now seen corresponding path program 61 times [2022-03-20 13:03:59,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:59,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1803978639] [2022-03-20 13:03:59,188 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:03:59,188 INFO L85 PathProgramCache]: Analyzing trace with hash 452837470, now seen corresponding path program 62 times [2022-03-20 13:03:59,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:59,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490184801] [2022-03-20 13:03:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:59,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:59,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:59,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:59,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490184801] [2022-03-20 13:03:59,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490184801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:59,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740748248] [2022-03-20 13:03:59,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:59,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:59,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:59,652 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) [2022-03-20 13:03:59,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 13:03:59,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:59,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:59,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 13:03:59,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:03:59,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:00,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740748248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:00,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:00,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-03-20 13:04:00,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:00,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1803978639] [2022-03-20 13:04:00,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1803978639] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:00,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:00,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 13:04:00,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016855623] [2022-03-20 13:04:00,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:00,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 13:04:00,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:00,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 13:04:00,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2223, Invalid=2889, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 13:04:00,968 INFO L87 Difference]: Start difference. First operand 170 states and 201 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:01,746 INFO L93 Difference]: Finished difference Result 188 states and 221 transitions. [2022-03-20 13:04:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 13:04:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-03-20 13:04:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:01,748 INFO L225 Difference]: With dead ends: 188 [2022-03-20 13:04:01,748 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 13:04:01,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4378, Invalid=6752, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 13:04:01,749 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 400 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:01,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 60 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:04:01,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 13:04:01,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2022-03-20 13:04:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.1941176470588235) internal successors, (203), 170 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 207 transitions. [2022-03-20 13:04:01,799 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 207 transitions. Word has length 79 [2022-03-20 13:04:01,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:01,799 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 207 transitions. [2022-03-20 13:04:01,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 207 transitions. [2022-03-20 13:04:01,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 13:04:01,800 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:01,800 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:01,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 13:04:02,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:02,016 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:02,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:02,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1026615961, now seen corresponding path program 63 times [2022-03-20 13:04:02,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:02,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1379985521] [2022-03-20 13:04:02,017 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:02,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1026615961, now seen corresponding path program 64 times [2022-03-20 13:04:02,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:02,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562108548] [2022-03-20 13:04:02,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:02,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:02,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:02,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:02,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562108548] [2022-03-20 13:04:02,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562108548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:02,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502130916] [2022-03-20 13:04:02,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:04:02,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:02,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:02,467 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) [2022-03-20 13:04:02,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 13:04:02,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:04:02,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:02,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 13:04:02,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:02,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:03,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502130916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:03,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:03,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-20 13:04:03,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:03,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1379985521] [2022-03-20 13:04:03,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1379985521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:03,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:03,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 13:04:03,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855469780] [2022-03-20 13:04:03,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:03,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 13:04:03,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:03,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 13:04:03,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2358, Invalid=3044, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 13:04:03,931 INFO L87 Difference]: Start difference. First operand 175 states and 207 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:04,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:04,844 INFO L93 Difference]: Finished difference Result 193 states and 227 transitions. [2022-03-20 13:04:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 13:04:04,845 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-20 13:04:04,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:04,845 INFO L225 Difference]: With dead ends: 193 [2022-03-20 13:04:04,845 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 13:04:04,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4646, Invalid=7126, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 13:04:04,846 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 509 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:04,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 40 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:04:04,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 13:04:04,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 180. [2022-03-20 13:04:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.1942857142857144) internal successors, (209), 175 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 213 transitions. [2022-03-20 13:04:04,890 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 213 transitions. Word has length 81 [2022-03-20 13:04:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:04,890 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 213 transitions. [2022-03-20 13:04:04,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 213 transitions. [2022-03-20 13:04:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 13:04:04,891 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:04,891 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:04,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-20 13:04:05,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:05,092 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:05,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:05,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1623035372, now seen corresponding path program 65 times [2022-03-20 13:04:05,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:05,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1933274913] [2022-03-20 13:04:05,092 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:05,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1623035372, now seen corresponding path program 66 times [2022-03-20 13:04:05,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:05,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415783045] [2022-03-20 13:04:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:05,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:05,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:05,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:05,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415783045] [2022-03-20 13:04:05,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415783045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:05,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283738267] [2022-03-20 13:04:05,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:04:05,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:05,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:05,604 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) [2022-03-20 13:04:05,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 13:04:05,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-20 13:04:05,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:05,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 13:04:05,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:05,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:07,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283738267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:07,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:07,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-03-20 13:04:07,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:07,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1933274913] [2022-03-20 13:04:07,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1933274913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:07,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:07,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 13:04:07,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724065419] [2022-03-20 13:04:07,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:07,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 13:04:07,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:07,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 13:04:07,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2497, Invalid=3203, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 13:04:07,209 INFO L87 Difference]: Start difference. First operand 180 states and 213 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:08,064 INFO L93 Difference]: Finished difference Result 198 states and 233 transitions. [2022-03-20 13:04:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 13:04:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-20 13:04:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:08,065 INFO L225 Difference]: With dead ends: 198 [2022-03-20 13:04:08,065 INFO L226 Difference]: Without dead ends: 192 [2022-03-20 13:04:08,066 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4922, Invalid=7510, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 13:04:08,066 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 525 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:08,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 50 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:04:08,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-20 13:04:08,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 185. [2022-03-20 13:04:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.1944444444444444) internal successors, (215), 180 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 219 transitions. [2022-03-20 13:04:08,134 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 219 transitions. Word has length 83 [2022-03-20 13:04:08,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:08,134 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 219 transitions. [2022-03-20 13:04:08,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:08,134 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 219 transitions. [2022-03-20 13:04:08,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 13:04:08,135 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:08,135 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:08,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-20 13:04:08,357 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,SelfDestructingSolverStorable34 [2022-03-20 13:04:08,357 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1022359857, now seen corresponding path program 67 times [2022-03-20 13:04:08,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:08,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1861749914] [2022-03-20 13:04:08,358 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:08,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1022359857, now seen corresponding path program 68 times [2022-03-20 13:04:08,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:08,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290191829] [2022-03-20 13:04:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:08,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:08,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:08,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:08,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290191829] [2022-03-20 13:04:08,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290191829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:08,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257374771] [2022-03-20 13:04:08,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:04:08,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:08,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:08,917 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) [2022-03-20 13:04:08,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 13:04:08,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:04:08,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:08,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 13:04:08,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:09,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:10,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257374771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:10,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:10,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-03-20 13:04:10,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:10,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1861749914] [2022-03-20 13:04:10,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1861749914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:10,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:10,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 13:04:10,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738748351] [2022-03-20 13:04:10,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:10,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 13:04:10,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:10,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 13:04:10,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2640, Invalid=3366, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 13:04:10,495 INFO L87 Difference]: Start difference. First operand 185 states and 219 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:11,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:11,378 INFO L93 Difference]: Finished difference Result 203 states and 239 transitions. [2022-03-20 13:04:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 13:04:11,379 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-20 13:04:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:11,380 INFO L225 Difference]: With dead ends: 203 [2022-03-20 13:04:11,380 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 13:04:11,381 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5206, Invalid=7904, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 13:04:11,381 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 664 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:11,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 35 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:04:11,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 13:04:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2022-03-20 13:04:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.1945945945945946) internal successors, (221), 185 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 225 transitions. [2022-03-20 13:04:11,427 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 225 transitions. Word has length 85 [2022-03-20 13:04:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:11,427 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 225 transitions. [2022-03-20 13:04:11,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:11,427 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 225 transitions. [2022-03-20 13:04:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 13:04:11,428 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:11,428 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:11,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-20 13:04:11,633 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,SelfDestructingSolverStorable35 [2022-03-20 13:04:11,633 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:11,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:11,633 INFO L85 PathProgramCache]: Analyzing trace with hash 701192394, now seen corresponding path program 69 times [2022-03-20 13:04:11,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:11,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2116857068] [2022-03-20 13:04:11,634 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:11,634 INFO L85 PathProgramCache]: Analyzing trace with hash 701192394, now seen corresponding path program 70 times [2022-03-20 13:04:11,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:11,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237205926] [2022-03-20 13:04:11,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:11,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:12,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:12,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:12,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237205926] [2022-03-20 13:04:12,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237205926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:12,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357810481] [2022-03-20 13:04:12,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:04:12,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:12,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:12,252 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) [2022-03-20 13:04:12,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 13:04:12,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:04:12,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 13:04:12,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:12,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:13,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357810481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:13,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:13,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-20 13:04:13,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:13,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2116857068] [2022-03-20 13:04:13,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2116857068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:13,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:13,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 13:04:13,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009781478] [2022-03-20 13:04:13,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:13,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 13:04:13,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:13,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 13:04:13,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2787, Invalid=3533, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 13:04:13,856 INFO L87 Difference]: Start difference. First operand 190 states and 225 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:14,776 INFO L93 Difference]: Finished difference Result 208 states and 245 transitions. [2022-03-20 13:04:14,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 13:04:14,776 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-20 13:04:14,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:14,777 INFO L225 Difference]: With dead ends: 208 [2022-03-20 13:04:14,777 INFO L226 Difference]: Without dead ends: 202 [2022-03-20 13:04:14,778 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5498, Invalid=8308, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 13:04:14,778 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 533 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:14,778 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 55 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:04:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-20 13:04:14,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2022-03-20 13:04:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.194736842105263) internal successors, (227), 190 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 231 transitions. [2022-03-20 13:04:14,828 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 231 transitions. Word has length 87 [2022-03-20 13:04:14,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:14,829 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 231 transitions. [2022-03-20 13:04:14,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:14,829 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 231 transitions. [2022-03-20 13:04:14,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 13:04:14,830 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:14,830 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:14,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-20 13:04:15,030 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,SelfDestructingSolverStorable36 [2022-03-20 13:04:15,030 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:15,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:15,031 INFO L85 PathProgramCache]: Analyzing trace with hash -822470651, now seen corresponding path program 71 times [2022-03-20 13:04:15,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:15,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1281181637] [2022-03-20 13:04:15,031 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:15,031 INFO L85 PathProgramCache]: Analyzing trace with hash -822470651, now seen corresponding path program 72 times [2022-03-20 13:04:15,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:15,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574981586] [2022-03-20 13:04:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:15,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:15,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:15,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:15,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574981586] [2022-03-20 13:04:15,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574981586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:15,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754300802] [2022-03-20 13:04:15,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:04:15,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:15,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:15,592 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) [2022-03-20 13:04:15,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 13:04:15,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-20 13:04:15,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:15,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 13:04:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:15,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:17,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754300802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:17,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:17,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-03-20 13:04:17,358 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:17,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1281181637] [2022-03-20 13:04:17,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1281181637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:17,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:17,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 13:04:17,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152828760] [2022-03-20 13:04:17,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:17,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 13:04:17,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:17,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 13:04:17,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2938, Invalid=3704, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 13:04:17,360 INFO L87 Difference]: Start difference. First operand 195 states and 231 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:18,304 INFO L93 Difference]: Finished difference Result 213 states and 251 transitions. [2022-03-20 13:04:18,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 13:04:18,304 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-20 13:04:18,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:18,305 INFO L225 Difference]: With dead ends: 213 [2022-03-20 13:04:18,305 INFO L226 Difference]: Without dead ends: 207 [2022-03-20 13:04:18,306 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5798, Invalid=8722, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 13:04:18,307 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 453 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:18,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 55 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:04:18,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-20 13:04:18,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 200. [2022-03-20 13:04:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 195 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 237 transitions. [2022-03-20 13:04:18,365 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 237 transitions. Word has length 89 [2022-03-20 13:04:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:18,365 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 237 transitions. [2022-03-20 13:04:18,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 237 transitions. [2022-03-20 13:04:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 13:04:18,366 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:18,366 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:18,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 13:04:18,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:18,589 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:18,589 INFO L85 PathProgramCache]: Analyzing trace with hash -478808960, now seen corresponding path program 73 times [2022-03-20 13:04:18,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:18,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858732195] [2022-03-20 13:04:18,590 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:18,590 INFO L85 PathProgramCache]: Analyzing trace with hash -478808960, now seen corresponding path program 74 times [2022-03-20 13:04:18,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:18,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198950427] [2022-03-20 13:04:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:18,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:19,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:19,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198950427] [2022-03-20 13:04:19,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198950427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057604535] [2022-03-20 13:04:19,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:04:19,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:19,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:19,205 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) [2022-03-20 13:04:19,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 13:04:19,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:04:19,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:19,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 13:04:19,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:19,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:20,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057604535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:20,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:20,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-03-20 13:04:20,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:20,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858732195] [2022-03-20 13:04:20,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858732195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:20,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:20,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 13:04:20,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836642264] [2022-03-20 13:04:20,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:20,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 13:04:20,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:20,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 13:04:20,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3093, Invalid=3879, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 13:04:20,950 INFO L87 Difference]: Start difference. First operand 200 states and 237 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:21,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:21,947 INFO L93 Difference]: Finished difference Result 218 states and 257 transitions. [2022-03-20 13:04:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 13:04:21,947 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-03-20 13:04:21,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:21,948 INFO L225 Difference]: With dead ends: 218 [2022-03-20 13:04:21,948 INFO L226 Difference]: Without dead ends: 212 [2022-03-20 13:04:21,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6106, Invalid=9146, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 13:04:21,949 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 553 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:21,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 40 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:04:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-20 13:04:22,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 205. [2022-03-20 13:04:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.195) internal successors, (239), 200 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:22,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 243 transitions. [2022-03-20 13:04:22,001 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 243 transitions. Word has length 91 [2022-03-20 13:04:22,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:22,001 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 243 transitions. [2022-03-20 13:04:22,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 243 transitions. [2022-03-20 13:04:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 13:04:22,002 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:22,002 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:22,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-20 13:04:22,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 13:04:22,211 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:22,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:22,211 INFO L85 PathProgramCache]: Analyzing trace with hash -932405701, now seen corresponding path program 75 times [2022-03-20 13:04:22,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:22,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2052825010] [2022-03-20 13:04:22,212 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:22,212 INFO L85 PathProgramCache]: Analyzing trace with hash -932405701, now seen corresponding path program 76 times [2022-03-20 13:04:22,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:22,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571213382] [2022-03-20 13:04:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:22,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:22,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:22,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:22,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571213382] [2022-03-20 13:04:22,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571213382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:22,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813832662] [2022-03-20 13:04:22,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:04:22,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:22,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:22,818 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) [2022-03-20 13:04:22,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 13:04:22,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:04:22,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:22,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 13:04:22,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:23,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:24,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813832662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:24,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:24,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-20 13:04:24,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:24,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2052825010] [2022-03-20 13:04:24,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2052825010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:24,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:24,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 13:04:24,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876964951] [2022-03-20 13:04:24,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:24,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 13:04:24,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:24,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 13:04:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3252, Invalid=4058, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 13:04:24,651 INFO L87 Difference]: Start difference. First operand 205 states and 243 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:25,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:25,699 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2022-03-20 13:04:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 13:04:25,699 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-20 13:04:25,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:25,700 INFO L225 Difference]: With dead ends: 223 [2022-03-20 13:04:25,700 INFO L226 Difference]: Without dead ends: 217 [2022-03-20 13:04:25,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6422, Invalid=9580, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 13:04:25,701 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 515 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:25,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 50 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:04:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-20 13:04:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 210. [2022-03-20 13:04:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.1951219512195121) internal successors, (245), 205 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2022-03-20 13:04:25,777 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 93 [2022-03-20 13:04:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:25,777 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2022-03-20 13:04:25,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:25,778 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2022-03-20 13:04:25,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 13:04:25,778 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:25,778 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:25,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-20 13:04:25,983 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,SelfDestructingSolverStorable39 [2022-03-20 13:04:25,983 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:25,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:25,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1247790390, now seen corresponding path program 77 times [2022-03-20 13:04:25,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:25,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1570652999] [2022-03-20 13:04:25,984 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:25,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1247790390, now seen corresponding path program 78 times [2022-03-20 13:04:25,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:25,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954773066] [2022-03-20 13:04:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:25,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:26,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:26,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:26,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954773066] [2022-03-20 13:04:26,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954773066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:26,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063454943] [2022-03-20 13:04:26,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:04:26,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:26,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:26,617 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) [2022-03-20 13:04:26,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 13:04:26,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-03-20 13:04:26,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:26,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 13:04:26,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:26,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:28,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063454943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:28,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:28,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-03-20 13:04:28,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:28,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1570652999] [2022-03-20 13:04:28,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1570652999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:28,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:28,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 13:04:28,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391972968] [2022-03-20 13:04:28,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:28,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 13:04:28,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:28,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 13:04:28,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3415, Invalid=4241, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 13:04:28,570 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:29,662 INFO L93 Difference]: Finished difference Result 228 states and 269 transitions. [2022-03-20 13:04:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 13:04:29,662 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-20 13:04:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:29,663 INFO L225 Difference]: With dead ends: 228 [2022-03-20 13:04:29,663 INFO L226 Difference]: Without dead ends: 222 [2022-03-20 13:04:29,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6746, Invalid=10024, Unknown=0, NotChecked=0, Total=16770 [2022-03-20 13:04:29,664 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 471 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:29,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 65 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:04:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-20 13:04:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2022-03-20 13:04:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.1952380952380952) internal successors, (251), 210 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 255 transitions. [2022-03-20 13:04:29,723 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 255 transitions. Word has length 95 [2022-03-20 13:04:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:29,723 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 255 transitions. [2022-03-20 13:04:29,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 255 transitions. [2022-03-20 13:04:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 13:04:29,724 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:29,724 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:29,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 13:04:29,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:29,931 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:29,931 INFO L85 PathProgramCache]: Analyzing trace with hash 472193393, now seen corresponding path program 79 times [2022-03-20 13:04:29,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:29,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [712095369] [2022-03-20 13:04:29,932 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:29,932 INFO L85 PathProgramCache]: Analyzing trace with hash 472193393, now seen corresponding path program 80 times [2022-03-20 13:04:29,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:29,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779271998] [2022-03-20 13:04:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:29,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:30,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:30,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:30,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779271998] [2022-03-20 13:04:30,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779271998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:30,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431228230] [2022-03-20 13:04:30,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:04:30,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:30,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:30,597 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) [2022-03-20 13:04:30,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 13:04:30,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:04:30,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:30,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 13:04:30,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:30,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:32,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431228230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:32,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:32,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-03-20 13:04:32,558 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:32,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [712095369] [2022-03-20 13:04:32,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [712095369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:32,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:32,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 13:04:32,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571864975] [2022-03-20 13:04:32,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:32,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 13:04:32,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:32,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 13:04:32,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3582, Invalid=4428, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 13:04:32,560 INFO L87 Difference]: Start difference. First operand 215 states and 255 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:33,683 INFO L93 Difference]: Finished difference Result 233 states and 275 transitions. [2022-03-20 13:04:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 13:04:33,683 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-03-20 13:04:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:33,684 INFO L225 Difference]: With dead ends: 233 [2022-03-20 13:04:33,684 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 13:04:33,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7078, Invalid=10478, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 13:04:33,686 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 583 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:33,686 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 40 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:04:33,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 13:04:33,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2022-03-20 13:04:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.1953488372093024) internal successors, (257), 215 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 261 transitions. [2022-03-20 13:04:33,751 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 261 transitions. Word has length 97 [2022-03-20 13:04:33,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:33,751 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 261 transitions. [2022-03-20 13:04:33,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:33,751 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 261 transitions. [2022-03-20 13:04:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 13:04:33,752 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:33,752 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:33,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-20 13:04:33,953 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,SelfDestructingSolverStorable41 [2022-03-20 13:04:33,953 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:33,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1847178516, now seen corresponding path program 81 times [2022-03-20 13:04:33,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:33,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [76998036] [2022-03-20 13:04:33,954 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:33,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1847178516, now seen corresponding path program 82 times [2022-03-20 13:04:33,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:33,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253215312] [2022-03-20 13:04:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:33,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:34,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:34,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:34,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253215312] [2022-03-20 13:04:34,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253215312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:34,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596779571] [2022-03-20 13:04:34,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:04:34,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:34,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:34,732 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) [2022-03-20 13:04:34,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 13:04:34,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:04:34,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:34,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 13:04:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:35,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:36,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596779571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:36,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:36,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-20 13:04:36,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:36,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [76998036] [2022-03-20 13:04:36,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [76998036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:36,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:36,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 13:04:36,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656924603] [2022-03-20 13:04:36,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:36,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 13:04:36,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:36,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 13:04:36,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3753, Invalid=4619, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 13:04:36,900 INFO L87 Difference]: Start difference. First operand 220 states and 261 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:38,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:38,083 INFO L93 Difference]: Finished difference Result 238 states and 281 transitions. [2022-03-20 13:04:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 13:04:38,084 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-03-20 13:04:38,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:38,084 INFO L225 Difference]: With dead ends: 238 [2022-03-20 13:04:38,084 INFO L226 Difference]: Without dead ends: 232 [2022-03-20 13:04:38,085 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7418, Invalid=10942, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 13:04:38,086 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 572 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:38,086 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 60 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:04:38,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-20 13:04:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2022-03-20 13:04:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.1954545454545455) internal successors, (263), 220 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 267 transitions. [2022-03-20 13:04:38,160 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 267 transitions. Word has length 99 [2022-03-20 13:04:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:38,160 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 267 transitions. [2022-03-20 13:04:38,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 267 transitions. [2022-03-20 13:04:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 13:04:38,161 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:38,161 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:38,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 13:04:38,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:38,383 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1675556441, now seen corresponding path program 83 times [2022-03-20 13:04:38,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:38,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [22721827] [2022-03-20 13:04:38,384 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1675556441, now seen corresponding path program 84 times [2022-03-20 13:04:38,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:38,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947700596] [2022-03-20 13:04:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:38,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:39,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:39,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:39,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947700596] [2022-03-20 13:04:39,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947700596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:39,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951013732] [2022-03-20 13:04:39,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:04:39,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:39,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:39,077 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) [2022-03-20 13:04:39,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 13:04:39,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-03-20 13:04:39,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:39,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 13:04:39,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:39,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:41,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951013732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:41,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:41,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-03-20 13:04:41,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:41,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [22721827] [2022-03-20 13:04:41,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [22721827] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:41,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:41,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 13:04:41,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456352119] [2022-03-20 13:04:41,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:41,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 13:04:41,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:41,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 13:04:41,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3928, Invalid=4814, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 13:04:41,289 INFO L87 Difference]: Start difference. First operand 225 states and 267 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:42,505 INFO L93 Difference]: Finished difference Result 243 states and 287 transitions. [2022-03-20 13:04:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 13:04:42,506 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-03-20 13:04:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:42,507 INFO L225 Difference]: With dead ends: 243 [2022-03-20 13:04:42,507 INFO L226 Difference]: Without dead ends: 237 [2022-03-20 13:04:42,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7766, Invalid=11416, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 13:04:42,508 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 636 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:42,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 50 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:04:42,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-20 13:04:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-03-20 13:04:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.1955555555555555) internal successors, (269), 225 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 273 transitions. [2022-03-20 13:04:42,591 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 273 transitions. Word has length 101 [2022-03-20 13:04:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:42,591 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 273 transitions. [2022-03-20 13:04:42,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 273 transitions. [2022-03-20 13:04:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 13:04:42,592 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:42,592 INFO L499 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:42,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-20 13:04:42,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:42,815 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 44500386, now seen corresponding path program 85 times [2022-03-20 13:04:42,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:42,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [84064510] [2022-03-20 13:04:42,816 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 44500386, now seen corresponding path program 86 times [2022-03-20 13:04:42,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:42,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691637021] [2022-03-20 13:04:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:42,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:43,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:43,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:43,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691637021] [2022-03-20 13:04:43,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691637021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:43,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639488809] [2022-03-20 13:04:43,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:04:43,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:43,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:43,629 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) [2022-03-20 13:04:43,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 13:04:43,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:04:43,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:43,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 13:04:43,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:43,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:45,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639488809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:45,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:45,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-20 13:04:45,865 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:45,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [84064510] [2022-03-20 13:04:45,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [84064510] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:45,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:45,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 13:04:45,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098256280] [2022-03-20 13:04:45,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:45,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 13:04:45,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 13:04:45,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4107, Invalid=5013, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 13:04:45,867 INFO L87 Difference]: Start difference. First operand 230 states and 273 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:47,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:47,160 INFO L93 Difference]: Finished difference Result 248 states and 293 transitions. [2022-03-20 13:04:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 13:04:47,160 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-03-20 13:04:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:47,161 INFO L225 Difference]: With dead ends: 248 [2022-03-20 13:04:47,161 INFO L226 Difference]: Without dead ends: 242 [2022-03-20 13:04:47,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8122, Invalid=11900, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 13:04:47,163 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 664 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:47,163 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 40 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:04:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-20 13:04:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 235. [2022-03-20 13:04:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.1956521739130435) internal successors, (275), 230 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 279 transitions. [2022-03-20 13:04:47,235 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 279 transitions. Word has length 103 [2022-03-20 13:04:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:47,236 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 279 transitions. [2022-03-20 13:04:47,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 279 transitions. [2022-03-20 13:04:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 13:04:47,236 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:47,237 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:47,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-20 13:04:47,451 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,SelfDestructingSolverStorable44 [2022-03-20 13:04:47,451 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:47,452 INFO L85 PathProgramCache]: Analyzing trace with hash -543297827, now seen corresponding path program 87 times [2022-03-20 13:04:47,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:47,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1977065962] [2022-03-20 13:04:47,452 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:47,452 INFO L85 PathProgramCache]: Analyzing trace with hash -543297827, now seen corresponding path program 88 times [2022-03-20 13:04:47,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:47,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960982010] [2022-03-20 13:04:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:47,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:48,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:48,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:48,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960982010] [2022-03-20 13:04:48,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960982010] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:48,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554403158] [2022-03-20 13:04:48,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:04:48,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:48,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:48,226 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) [2022-03-20 13:04:48,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 13:04:48,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:04:48,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:48,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 13:04:48,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:48,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:50,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554403158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:50,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:50,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-20 13:04:50,556 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:50,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1977065962] [2022-03-20 13:04:50,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1977065962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:50,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:50,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 13:04:50,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439064923] [2022-03-20 13:04:50,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:50,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 13:04:50,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:50,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 13:04:50,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=5216, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 13:04:50,560 INFO L87 Difference]: Start difference. First operand 235 states and 279 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:51,879 INFO L93 Difference]: Finished difference Result 253 states and 299 transitions. [2022-03-20 13:04:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 13:04:51,879 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-03-20 13:04:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:51,880 INFO L225 Difference]: With dead ends: 253 [2022-03-20 13:04:51,880 INFO L226 Difference]: Without dead ends: 247 [2022-03-20 13:04:51,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8486, Invalid=12394, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 13:04:51,882 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 590 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:51,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 50 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:04:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-20 13:04:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 240. [2022-03-20 13:04:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.195744680851064) internal successors, (281), 235 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 285 transitions. [2022-03-20 13:04:51,958 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 285 transitions. Word has length 105 [2022-03-20 13:04:51,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:51,958 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 285 transitions. [2022-03-20 13:04:51,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 285 transitions. [2022-03-20 13:04:51,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 13:04:51,959 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:51,959 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:51,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-20 13:04:52,177 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,SelfDestructingSolverStorable45 [2022-03-20 13:04:52,177 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:52,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:52,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1518302552, now seen corresponding path program 89 times [2022-03-20 13:04:52,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:52,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1128555778] [2022-03-20 13:04:52,178 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:52,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1518302552, now seen corresponding path program 90 times [2022-03-20 13:04:52,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:52,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680983911] [2022-03-20 13:04:52,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:52,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:53,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:53,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:53,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680983911] [2022-03-20 13:04:53,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680983911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:53,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217652288] [2022-03-20 13:04:53,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:04:53,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:53,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:53,039 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) [2022-03-20 13:04:53,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 13:04:53,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-03-20 13:04:53,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:53,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 13:04:53,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:53,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:55,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217652288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:55,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:55,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-03-20 13:04:55,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:55,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1128555778] [2022-03-20 13:04:55,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1128555778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:55,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:55,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 13:04:55,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945726731] [2022-03-20 13:04:55,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:55,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 13:04:55,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:55,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 13:04:55,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4477, Invalid=5423, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 13:04:55,591 INFO L87 Difference]: Start difference. First operand 240 states and 285 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:56,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:56,967 INFO L93 Difference]: Finished difference Result 258 states and 305 transitions. [2022-03-20 13:04:56,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 13:04:56,967 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-03-20 13:04:56,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:56,968 INFO L225 Difference]: With dead ends: 258 [2022-03-20 13:04:56,968 INFO L226 Difference]: Without dead ends: 252 [2022-03-20 13:04:56,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8858, Invalid=12898, Unknown=0, NotChecked=0, Total=21756 [2022-03-20 13:04:56,969 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 621 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:56,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 45 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:04:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-20 13:04:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 245. [2022-03-20 13:04:57,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.1958333333333333) internal successors, (287), 240 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 291 transitions. [2022-03-20 13:04:57,046 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 291 transitions. Word has length 107 [2022-03-20 13:04:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:57,047 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 291 transitions. [2022-03-20 13:04:57,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:04:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 291 transitions. [2022-03-20 13:04:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 13:04:57,048 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:57,048 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:57,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-20 13:04:57,253 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,SelfDestructingSolverStorable46 [2022-03-20 13:04:57,253 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:57,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:57,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1558623981, now seen corresponding path program 91 times [2022-03-20 13:04:57,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:57,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1850066536] [2022-03-20 13:04:57,254 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:04:57,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1558623981, now seen corresponding path program 92 times [2022-03-20 13:04:57,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:57,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870081863] [2022-03-20 13:04:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:57,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:58,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:58,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:58,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870081863] [2022-03-20 13:04:58,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870081863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:58,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264802530] [2022-03-20 13:04:58,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:04:58,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:58,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:58,121 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) [2022-03-20 13:04:58,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 13:04:58,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:04:58,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:58,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 13:04:58,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:04:58,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:00,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264802530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:00,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:00,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-20 13:05:00,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:00,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1850066536] [2022-03-20 13:05:00,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1850066536] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:00,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:00,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 13:05:00,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830617494] [2022-03-20 13:05:00,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:00,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 13:05:00,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 13:05:00,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4668, Invalid=5634, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 13:05:00,633 INFO L87 Difference]: Start difference. First operand 245 states and 291 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:02,050 INFO L93 Difference]: Finished difference Result 263 states and 311 transitions. [2022-03-20 13:05:02,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 13:05:02,050 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-03-20 13:05:02,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:02,051 INFO L225 Difference]: With dead ends: 263 [2022-03-20 13:05:02,051 INFO L226 Difference]: Without dead ends: 257 [2022-03-20 13:05:02,053 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9238, Invalid=13412, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 13:05:02,053 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 634 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:02,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 35 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:05:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-20 13:05:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-03-20 13:05:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.1959183673469387) internal successors, (293), 245 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 297 transitions. [2022-03-20 13:05:02,171 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 297 transitions. Word has length 109 [2022-03-20 13:05:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:02,171 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 297 transitions. [2022-03-20 13:05:02,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:02,171 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 297 transitions. [2022-03-20 13:05:02,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 13:05:02,172 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:02,172 INFO L499 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:02,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 13:05:02,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:02,395 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:02,395 INFO L85 PathProgramCache]: Analyzing trace with hash 747444750, now seen corresponding path program 93 times [2022-03-20 13:05:02,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:02,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1951542578] [2022-03-20 13:05:02,396 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:05:02,396 INFO L85 PathProgramCache]: Analyzing trace with hash 747444750, now seen corresponding path program 94 times [2022-03-20 13:05:02,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:02,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905446259] [2022-03-20 13:05:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:02,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:03,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:03,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:03,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905446259] [2022-03-20 13:05:03,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905446259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:03,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170419824] [2022-03-20 13:05:03,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:05:03,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:03,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:03,342 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) [2022-03-20 13:05:03,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 13:05:03,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:05:03,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:03,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 13:05:03,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:03,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:06,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170419824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:06,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:06,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-20 13:05:06,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:06,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1951542578] [2022-03-20 13:05:06,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1951542578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:06,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:06,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 13:05:06,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966494940] [2022-03-20 13:05:06,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:06,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 13:05:06,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:06,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 13:05:06,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4863, Invalid=5849, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 13:05:06,036 INFO L87 Difference]: Start difference. First operand 250 states and 297 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:07,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:07,545 INFO L93 Difference]: Finished difference Result 268 states and 317 transitions. [2022-03-20 13:05:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 13:05:07,546 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-03-20 13:05:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:07,547 INFO L225 Difference]: With dead ends: 268 [2022-03-20 13:05:07,547 INFO L226 Difference]: Without dead ends: 262 [2022-03-20 13:05:07,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9626, Invalid=13936, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 13:05:07,549 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 668 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:07,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 45 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:05:07,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-03-20 13:05:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 255. [2022-03-20 13:05:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.196) internal successors, (299), 250 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:07,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 303 transitions. [2022-03-20 13:05:07,642 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 303 transitions. Word has length 111 [2022-03-20 13:05:07,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:07,642 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 303 transitions. [2022-03-20 13:05:07,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:07,643 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 303 transitions. [2022-03-20 13:05:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 13:05:07,643 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:07,643 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:07,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-20 13:05:07,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 13:05:07,859 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:07,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:07,860 INFO L85 PathProgramCache]: Analyzing trace with hash 676370505, now seen corresponding path program 95 times [2022-03-20 13:05:07,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:07,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2083798075] [2022-03-20 13:05:07,860 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:05:07,861 INFO L85 PathProgramCache]: Analyzing trace with hash 676370505, now seen corresponding path program 96 times [2022-03-20 13:05:07,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:07,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371631274] [2022-03-20 13:05:07,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:07,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:08,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:08,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:08,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371631274] [2022-03-20 13:05:08,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371631274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:08,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488388386] [2022-03-20 13:05:08,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:05:08,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:08,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:08,719 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) [2022-03-20 13:05:08,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 13:05:08,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-03-20 13:05:08,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:08,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 13:05:08,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:09,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:11,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488388386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:11,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:11,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-03-20 13:05:11,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:11,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2083798075] [2022-03-20 13:05:11,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2083798075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:11,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:11,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 13:05:11,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745095719] [2022-03-20 13:05:11,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:11,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 13:05:11,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:11,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 13:05:11,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5062, Invalid=6068, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 13:05:11,465 INFO L87 Difference]: Start difference. First operand 255 states and 303 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:12,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:12,961 INFO L93 Difference]: Finished difference Result 273 states and 323 transitions. [2022-03-20 13:05:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 13:05:12,961 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-03-20 13:05:12,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:12,962 INFO L225 Difference]: With dead ends: 273 [2022-03-20 13:05:12,962 INFO L226 Difference]: Without dead ends: 267 [2022-03-20 13:05:12,963 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10022, Invalid=14470, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 13:05:12,963 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 696 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:12,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 50 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:05:12,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-20 13:05:13,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 260. [2022-03-20 13:05:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.196078431372549) internal successors, (305), 255 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 309 transitions. [2022-03-20 13:05:13,046 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 309 transitions. Word has length 113 [2022-03-20 13:05:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:13,046 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 309 transitions. [2022-03-20 13:05:13,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 309 transitions. [2022-03-20 13:05:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 13:05:13,048 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:13,048 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:13,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-20 13:05:13,270 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 13:05:13,271 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:13,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:13,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1093497796, now seen corresponding path program 97 times [2022-03-20 13:05:13,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:13,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [298896928] [2022-03-20 13:05:13,272 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:05:13,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1093497796, now seen corresponding path program 98 times [2022-03-20 13:05:13,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:13,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619350056] [2022-03-20 13:05:13,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:13,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:14,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:14,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:14,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619350056] [2022-03-20 13:05:14,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619350056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:14,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642242251] [2022-03-20 13:05:14,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:05:14,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:14,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:14,158 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) [2022-03-20 13:05:14,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 13:05:14,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:05:14,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:14,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 13:05:14,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:14,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:16,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642242251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:16,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:16,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-03-20 13:05:16,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:16,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [298896928] [2022-03-20 13:05:16,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [298896928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:16,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:16,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 13:05:16,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282890620] [2022-03-20 13:05:16,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:16,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 13:05:16,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:16,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 13:05:16,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5265, Invalid=6291, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 13:05:16,998 INFO L87 Difference]: Start difference. First operand 260 states and 309 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:18,566 INFO L93 Difference]: Finished difference Result 278 states and 329 transitions. [2022-03-20 13:05:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 13:05:18,567 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-03-20 13:05:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:18,568 INFO L225 Difference]: With dead ends: 278 [2022-03-20 13:05:18,568 INFO L226 Difference]: Without dead ends: 272 [2022-03-20 13:05:18,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10426, Invalid=15014, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 13:05:18,569 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 808 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:18,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 50 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:05:18,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-20 13:05:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 265. [2022-03-20 13:05:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.1961538461538461) internal successors, (311), 260 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 315 transitions. [2022-03-20 13:05:18,697 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 315 transitions. Word has length 115 [2022-03-20 13:05:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:18,698 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 315 transitions. [2022-03-20 13:05:18,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 315 transitions. [2022-03-20 13:05:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 13:05:18,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:18,699 INFO L499 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:18,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 13:05:18,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:18,903 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:18,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:18,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1774101377, now seen corresponding path program 99 times [2022-03-20 13:05:18,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:18,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963246258] [2022-03-20 13:05:18,904 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:05:18,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1774101377, now seen corresponding path program 100 times [2022-03-20 13:05:18,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:18,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410402957] [2022-03-20 13:05:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:18,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:19,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:19,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:19,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410402957] [2022-03-20 13:05:19,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410402957] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:19,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570136519] [2022-03-20 13:05:19,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:05:19,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:19,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:19,838 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) [2022-03-20 13:05:19,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 13:05:19,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:05:19,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:19,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 13:05:19,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:20,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:22,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570136519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:22,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:22,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-20 13:05:22,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:22,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963246258] [2022-03-20 13:05:22,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963246258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:22,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:22,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 13:05:22,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721469908] [2022-03-20 13:05:22,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:22,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 13:05:22,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:22,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 13:05:22,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5472, Invalid=6518, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 13:05:22,823 INFO L87 Difference]: Start difference. First operand 265 states and 315 transitions. Second operand has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:24,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:24,470 INFO L93 Difference]: Finished difference Result 283 states and 335 transitions. [2022-03-20 13:05:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 13:05:24,471 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-03-20 13:05:24,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:24,472 INFO L225 Difference]: With dead ends: 283 [2022-03-20 13:05:24,472 INFO L226 Difference]: Without dead ends: 277 [2022-03-20 13:05:24,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10838, Invalid=15568, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 13:05:24,473 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 737 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:24,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 45 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:05:24,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-20 13:05:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 270. [2022-03-20 13:05:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.1962264150943396) internal successors, (317), 265 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 321 transitions. [2022-03-20 13:05:24,583 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 321 transitions. Word has length 117 [2022-03-20 13:05:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:24,584 INFO L478 AbstractCegarLoop]: Abstraction has 270 states and 321 transitions. [2022-03-20 13:05:24,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 321 transitions. [2022-03-20 13:05:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 13:05:24,585 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:24,585 INFO L499 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:24,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-20 13:05:24,786 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,SelfDestructingSolverStorable51 [2022-03-20 13:05:24,786 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:24,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:24,787 INFO L85 PathProgramCache]: Analyzing trace with hash -167902598, now seen corresponding path program 101 times [2022-03-20 13:05:24,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:24,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [943882749] [2022-03-20 13:05:24,787 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:05:24,787 INFO L85 PathProgramCache]: Analyzing trace with hash -167902598, now seen corresponding path program 102 times [2022-03-20 13:05:24,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:24,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718857402] [2022-03-20 13:05:24,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:24,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:25,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:25,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:25,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718857402] [2022-03-20 13:05:25,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718857402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:25,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762739197] [2022-03-20 13:05:25,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:05:25,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:25,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:25,734 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) [2022-03-20 13:05:25,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 13:05:25,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-03-20 13:05:25,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:25,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 13:05:25,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:26,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:28,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762739197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:28,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:28,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-03-20 13:05:28,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:28,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [943882749] [2022-03-20 13:05:28,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [943882749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:28,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:28,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 13:05:28,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717816828] [2022-03-20 13:05:28,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:28,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 13:05:28,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:28,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 13:05:28,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5683, Invalid=6749, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 13:05:28,754 INFO L87 Difference]: Start difference. First operand 270 states and 321 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:30,441 INFO L93 Difference]: Finished difference Result 288 states and 341 transitions. [2022-03-20 13:05:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 13:05:30,441 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-03-20 13:05:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:30,442 INFO L225 Difference]: With dead ends: 288 [2022-03-20 13:05:30,442 INFO L226 Difference]: Without dead ends: 282 [2022-03-20 13:05:30,443 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11258, Invalid=16132, Unknown=0, NotChecked=0, Total=27390 [2022-03-20 13:05:30,443 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 765 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:30,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 45 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:05:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-03-20 13:05:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 275. [2022-03-20 13:05:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.1962962962962962) internal successors, (323), 270 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 327 transitions. [2022-03-20 13:05:30,544 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 327 transitions. Word has length 119 [2022-03-20 13:05:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:30,545 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 327 transitions. [2022-03-20 13:05:30,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:30,545 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 327 transitions. [2022-03-20 13:05:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 13:05:30,546 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:30,546 INFO L499 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:30,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 13:05:30,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:30,759 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:30,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1495864757, now seen corresponding path program 103 times [2022-03-20 13:05:30,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:30,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1214063193] [2022-03-20 13:05:30,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:05:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1495864757, now seen corresponding path program 104 times [2022-03-20 13:05:30,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:30,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586265661] [2022-03-20 13:05:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:30,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:31,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:31,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:31,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586265661] [2022-03-20 13:05:31,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586265661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:31,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516719911] [2022-03-20 13:05:31,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:05:31,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:31,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:31,781 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) [2022-03-20 13:05:31,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 13:05:31,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:05:31,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:31,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 13:05:31,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:32,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:34,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516719911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:34,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:34,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-03-20 13:05:34,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:34,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1214063193] [2022-03-20 13:05:34,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1214063193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:34,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:34,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 13:05:34,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224952627] [2022-03-20 13:05:34,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:34,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 13:05:34,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:34,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 13:05:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5898, Invalid=6984, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 13:05:34,864 INFO L87 Difference]: Start difference. First operand 275 states and 327 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:36,642 INFO L93 Difference]: Finished difference Result 293 states and 347 transitions. [2022-03-20 13:05:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 13:05:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-03-20 13:05:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:36,644 INFO L225 Difference]: With dead ends: 293 [2022-03-20 13:05:36,644 INFO L226 Difference]: Without dead ends: 287 [2022-03-20 13:05:36,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2382 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=11686, Invalid=16706, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 13:05:36,645 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 772 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:36,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 45 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:05:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-20 13:05:36,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 280. [2022-03-20 13:05:36,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.1963636363636363) internal successors, (329), 275 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 333 transitions. [2022-03-20 13:05:36,747 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 333 transitions. Word has length 121 [2022-03-20 13:05:36,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:36,747 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 333 transitions. [2022-03-20 13:05:36,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:36,747 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 333 transitions. [2022-03-20 13:05:36,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 13:05:36,748 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:36,748 INFO L499 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:36,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-20 13:05:36,963 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,SelfDestructingSolverStorable53 [2022-03-20 13:05:36,963 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1646508496, now seen corresponding path program 105 times [2022-03-20 13:05:36,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:36,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [420905725] [2022-03-20 13:05:36,964 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:05:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1646508496, now seen corresponding path program 106 times [2022-03-20 13:05:36,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:36,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079073336] [2022-03-20 13:05:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:36,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:37,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:37,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:37,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079073336] [2022-03-20 13:05:37,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079073336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:37,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796244029] [2022-03-20 13:05:37,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:05:37,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:37,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:37,996 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) [2022-03-20 13:05:37,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 13:05:38,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:05:38,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 13:05:38,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:38,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:41,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796244029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:41,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:41,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-20 13:05:41,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:41,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [420905725] [2022-03-20 13:05:41,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [420905725] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:41,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:41,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 13:05:41,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524070217] [2022-03-20 13:05:41,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:41,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 13:05:41,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 13:05:41,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6117, Invalid=7223, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 13:05:41,192 INFO L87 Difference]: Start difference. First operand 280 states and 333 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:42,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:42,989 INFO L93 Difference]: Finished difference Result 298 states and 353 transitions. [2022-03-20 13:05:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 13:05:42,990 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-03-20 13:05:42,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:42,991 INFO L225 Difference]: With dead ends: 298 [2022-03-20 13:05:42,991 INFO L226 Difference]: Without dead ends: 292 [2022-03-20 13:05:42,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12122, Invalid=17290, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 13:05:42,992 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 743 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:42,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 55 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:05:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-03-20 13:05:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 285. [2022-03-20 13:05:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.1964285714285714) internal successors, (335), 280 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 339 transitions. [2022-03-20 13:05:43,109 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 339 transitions. Word has length 123 [2022-03-20 13:05:43,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:43,109 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 339 transitions. [2022-03-20 13:05:43,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:43,110 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 339 transitions. [2022-03-20 13:05:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 13:05:43,110 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:43,110 INFO L499 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:43,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-20 13:05:43,310 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,SelfDestructingSolverStorable54 [2022-03-20 13:05:43,311 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:43,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:43,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2105195541, now seen corresponding path program 107 times [2022-03-20 13:05:43,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:43,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [296785597] [2022-03-20 13:05:43,312 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:05:43,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2105195541, now seen corresponding path program 108 times [2022-03-20 13:05:43,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:43,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065413058] [2022-03-20 13:05:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:43,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:44,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:44,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:44,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065413058] [2022-03-20 13:05:44,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065413058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:44,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344409140] [2022-03-20 13:05:44,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:05:44,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:44,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:44,351 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) [2022-03-20 13:05:44,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 13:05:44,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-03-20 13:05:44,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:44,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 13:05:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:44,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:47,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344409140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:47,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:47,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-03-20 13:05:47,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:47,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [296785597] [2022-03-20 13:05:47,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [296785597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:47,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:47,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 13:05:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618525291] [2022-03-20 13:05:47,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:47,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 13:05:47,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 13:05:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6340, Invalid=7466, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 13:05:47,662 INFO L87 Difference]: Start difference. First operand 285 states and 339 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:49,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:49,525 INFO L93 Difference]: Finished difference Result 303 states and 359 transitions. [2022-03-20 13:05:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 13:05:49,525 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-03-20 13:05:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:49,526 INFO L225 Difference]: With dead ends: 303 [2022-03-20 13:05:49,526 INFO L226 Difference]: Without dead ends: 297 [2022-03-20 13:05:49,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12566, Invalid=17884, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 13:05:49,528 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 885 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:49,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 50 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:05:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-20 13:05:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 290. [2022-03-20 13:05:49,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.1964912280701754) internal successors, (341), 285 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 345 transitions. [2022-03-20 13:05:49,671 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 345 transitions. Word has length 125 [2022-03-20 13:05:49,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:49,671 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 345 transitions. [2022-03-20 13:05:49,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 345 transitions. [2022-03-20 13:05:49,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 13:05:49,672 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:49,672 INFO L499 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:49,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-20 13:05:49,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:49,876 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:49,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:49,876 INFO L85 PathProgramCache]: Analyzing trace with hash -521814298, now seen corresponding path program 109 times [2022-03-20 13:05:49,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:49,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1146533411] [2022-03-20 13:05:49,877 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:05:49,877 INFO L85 PathProgramCache]: Analyzing trace with hash -521814298, now seen corresponding path program 110 times [2022-03-20 13:05:49,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:49,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252952842] [2022-03-20 13:05:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:49,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:50,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:50,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:50,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252952842] [2022-03-20 13:05:50,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252952842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:50,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889958109] [2022-03-20 13:05:50,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:05:50,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:50,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:50,962 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) [2022-03-20 13:05:50,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 13:05:51,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:05:51,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:51,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 13:05:51,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:51,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:54,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889958109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:54,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:54,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-03-20 13:05:54,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:54,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1146533411] [2022-03-20 13:05:54,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1146533411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:54,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:54,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 13:05:54,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567204028] [2022-03-20 13:05:54,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:54,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 13:05:54,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:54,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 13:05:54,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6567, Invalid=7713, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 13:05:54,330 INFO L87 Difference]: Start difference. First operand 290 states and 345 transitions. Second operand has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:56,264 INFO L93 Difference]: Finished difference Result 308 states and 365 transitions. [2022-03-20 13:05:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 13:05:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-03-20 13:05:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:56,266 INFO L225 Difference]: With dead ends: 308 [2022-03-20 13:05:56,266 INFO L226 Difference]: Without dead ends: 302 [2022-03-20 13:05:56,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13018, Invalid=18488, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 13:05:56,267 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 736 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:56,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 65 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:05:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-20 13:05:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 295. [2022-03-20 13:05:56,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.196551724137931) internal successors, (347), 290 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 351 transitions. [2022-03-20 13:05:56,384 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 351 transitions. Word has length 127 [2022-03-20 13:05:56,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:56,384 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 351 transitions. [2022-03-20 13:05:56,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:05:56,384 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 351 transitions. [2022-03-20 13:05:56,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 13:05:56,384 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:56,385 INFO L499 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:56,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-20 13:05:56,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:56,585 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:56,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:56,585 INFO L85 PathProgramCache]: Analyzing trace with hash 689137441, now seen corresponding path program 111 times [2022-03-20 13:05:56,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:56,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1553395946] [2022-03-20 13:05:56,586 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:05:56,586 INFO L85 PathProgramCache]: Analyzing trace with hash 689137441, now seen corresponding path program 112 times [2022-03-20 13:05:56,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:56,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040068682] [2022-03-20 13:05:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:56,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:57,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:57,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:57,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040068682] [2022-03-20 13:05:57,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040068682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:57,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546729468] [2022-03-20 13:05:57,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:05:57,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:57,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:57,688 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) [2022-03-20 13:05:57,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 13:05:57,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:05:57,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:57,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 13:05:57,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:05:58,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:01,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546729468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:01,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:01,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-20 13:06:01,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:01,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1553395946] [2022-03-20 13:06:01,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1553395946] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:01,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:01,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 13:06:01,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941816540] [2022-03-20 13:06:01,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:01,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 13:06:01,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:01,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 13:06:01,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6798, Invalid=7964, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 13:06:01,240 INFO L87 Difference]: Start difference. First operand 295 states and 351 transitions. Second operand has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:03,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:03,271 INFO L93 Difference]: Finished difference Result 313 states and 371 transitions. [2022-03-20 13:06:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 13:06:03,271 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-03-20 13:06:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:03,272 INFO L225 Difference]: With dead ends: 313 [2022-03-20 13:06:03,272 INFO L226 Difference]: Without dead ends: 307 [2022-03-20 13:06:03,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13478, Invalid=19102, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 13:06:03,274 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 878 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:03,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 45 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:06:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-20 13:06:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2022-03-20 13:06:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.1966101694915254) internal successors, (353), 295 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:03,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 357 transitions. [2022-03-20 13:06:03,389 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 357 transitions. Word has length 129 [2022-03-20 13:06:03,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:03,390 INFO L478 AbstractCegarLoop]: Abstraction has 300 states and 357 transitions. [2022-03-20 13:06:03,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:03,390 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 357 transitions. [2022-03-20 13:06:03,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 13:06:03,390 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:03,390 INFO L499 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:03,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-20 13:06:03,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:03,591 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:03,591 INFO L85 PathProgramCache]: Analyzing trace with hash 477621404, now seen corresponding path program 113 times [2022-03-20 13:06:03,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:03,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [695761000] [2022-03-20 13:06:03,592 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:06:03,592 INFO L85 PathProgramCache]: Analyzing trace with hash 477621404, now seen corresponding path program 114 times [2022-03-20 13:06:03,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:03,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177734914] [2022-03-20 13:06:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:03,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:04,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:04,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:04,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177734914] [2022-03-20 13:06:04,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177734914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:04,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723315792] [2022-03-20 13:06:04,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:06:04,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:04,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:04,727 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) [2022-03-20 13:06:04,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 13:06:04,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2022-03-20 13:06:04,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:04,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 13:06:04,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:05,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:08,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723315792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:08,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:08,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-03-20 13:06:08,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:08,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [695761000] [2022-03-20 13:06:08,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [695761000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:08,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:08,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 13:06:08,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544100990] [2022-03-20 13:06:08,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:08,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 13:06:08,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:08,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 13:06:08,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7033, Invalid=8219, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 13:06:08,373 INFO L87 Difference]: Start difference. First operand 300 states and 357 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:10,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:10,459 INFO L93 Difference]: Finished difference Result 318 states and 377 transitions. [2022-03-20 13:06:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 13:06:10,460 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-03-20 13:06:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:10,461 INFO L225 Difference]: With dead ends: 318 [2022-03-20 13:06:10,461 INFO L226 Difference]: Without dead ends: 312 [2022-03-20 13:06:10,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13946, Invalid=19726, Unknown=0, NotChecked=0, Total=33672 [2022-03-20 13:06:10,462 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 870 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:10,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 55 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:06:10,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-20 13:06:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 305. [2022-03-20 13:06:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.1966666666666668) internal successors, (359), 300 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 363 transitions. [2022-03-20 13:06:10,605 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 363 transitions. Word has length 131 [2022-03-20 13:06:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:10,606 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 363 transitions. [2022-03-20 13:06:10,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 363 transitions. [2022-03-20 13:06:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 13:06:10,606 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:10,606 INFO L499 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:10,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-20 13:06:10,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-20 13:06:10,807 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:10,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:10,807 INFO L85 PathProgramCache]: Analyzing trace with hash -925827241, now seen corresponding path program 115 times [2022-03-20 13:06:10,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:10,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [26127281] [2022-03-20 13:06:10,808 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:06:10,808 INFO L85 PathProgramCache]: Analyzing trace with hash -925827241, now seen corresponding path program 116 times [2022-03-20 13:06:10,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:10,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462555946] [2022-03-20 13:06:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:10,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:11,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:11,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:11,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462555946] [2022-03-20 13:06:11,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462555946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:11,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361472290] [2022-03-20 13:06:11,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:06:11,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:11,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:11,991 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) [2022-03-20 13:06:11,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 13:06:12,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:06:12,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:12,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 13:06:12,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:12,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:15,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361472290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:15,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:15,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-03-20 13:06:15,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:15,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [26127281] [2022-03-20 13:06:15,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [26127281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:15,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:15,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 13:06:15,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762557178] [2022-03-20 13:06:15,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:15,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 13:06:15,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:15,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 13:06:15,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7272, Invalid=8478, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 13:06:15,763 INFO L87 Difference]: Start difference. First operand 305 states and 363 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:17,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:17,956 INFO L93 Difference]: Finished difference Result 323 states and 383 transitions. [2022-03-20 13:06:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 13:06:17,956 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-03-20 13:06:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:17,958 INFO L225 Difference]: With dead ends: 323 [2022-03-20 13:06:17,958 INFO L226 Difference]: Without dead ends: 317 [2022-03-20 13:06:17,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14422, Invalid=20360, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 13:06:17,959 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1057 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:17,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 60 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:06:17,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-03-20 13:06:18,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 310. [2022-03-20 13:06:18,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.1967213114754098) internal successors, (365), 305 states have internal predecessors, (365), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:18,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 369 transitions. [2022-03-20 13:06:18,089 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 369 transitions. Word has length 133 [2022-03-20 13:06:18,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:18,090 INFO L478 AbstractCegarLoop]: Abstraction has 310 states and 369 transitions. [2022-03-20 13:06:18,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:18,090 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 369 transitions. [2022-03-20 13:06:18,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 13:06:18,090 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:18,090 INFO L499 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:18,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-20 13:06:18,291 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,SelfDestructingSolverStorable59 [2022-03-20 13:06:18,291 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:18,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:18,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1020244142, now seen corresponding path program 117 times [2022-03-20 13:06:18,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:18,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [430439291] [2022-03-20 13:06:18,292 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:06:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1020244142, now seen corresponding path program 118 times [2022-03-20 13:06:18,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:18,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301718739] [2022-03-20 13:06:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:18,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:19,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:19,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:19,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301718739] [2022-03-20 13:06:19,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301718739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:19,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282759896] [2022-03-20 13:06:19,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:06:19,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:19,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:19,547 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) [2022-03-20 13:06:19,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 13:06:19,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:06:19,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:19,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 13:06:19,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:19,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:23,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282759896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:23,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:23,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-20 13:06:23,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:23,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [430439291] [2022-03-20 13:06:23,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [430439291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:23,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:23,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 13:06:23,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135452384] [2022-03-20 13:06:23,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:23,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 13:06:23,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:23,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 13:06:23,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7515, Invalid=8741, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 13:06:23,426 INFO L87 Difference]: Start difference. First operand 310 states and 369 transitions. Second operand has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:25,640 INFO L93 Difference]: Finished difference Result 328 states and 389 transitions. [2022-03-20 13:06:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 13:06:25,640 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-03-20 13:06:25,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:25,641 INFO L225 Difference]: With dead ends: 328 [2022-03-20 13:06:25,641 INFO L226 Difference]: Without dead ends: 322 [2022-03-20 13:06:25,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=14906, Invalid=21004, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 13:06:25,643 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 824 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:25,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 45 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:06:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-03-20 13:06:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 315. [2022-03-20 13:06:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.196774193548387) internal successors, (371), 310 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 375 transitions. [2022-03-20 13:06:25,772 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 375 transitions. Word has length 135 [2022-03-20 13:06:25,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:25,772 INFO L478 AbstractCegarLoop]: Abstraction has 315 states and 375 transitions. [2022-03-20 13:06:25,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 375 transitions. [2022-03-20 13:06:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 13:06:25,773 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:25,773 INFO L499 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:25,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-20 13:06:25,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:25,974 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:25,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:25,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1560572787, now seen corresponding path program 119 times [2022-03-20 13:06:25,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:25,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1730411563] [2022-03-20 13:06:25,974 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:06:25,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1560572787, now seen corresponding path program 120 times [2022-03-20 13:06:25,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:25,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308478458] [2022-03-20 13:06:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:25,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:27,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:27,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:27,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308478458] [2022-03-20 13:06:27,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308478458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:27,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237239977] [2022-03-20 13:06:27,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:06:27,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:27,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:27,248 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) [2022-03-20 13:06:27,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 13:06:27,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2022-03-20 13:06:27,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:27,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 13:06:27,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:27,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:31,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237239977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:31,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:31,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-03-20 13:06:31,301 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:31,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1730411563] [2022-03-20 13:06:31,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1730411563] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:31,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:31,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 13:06:31,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238444381] [2022-03-20 13:06:31,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:31,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 13:06:31,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:31,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 13:06:31,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7762, Invalid=9008, Unknown=0, NotChecked=0, Total=16770 [2022-03-20 13:06:31,303 INFO L87 Difference]: Start difference. First operand 315 states and 375 transitions. Second operand has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:33,564 INFO L93 Difference]: Finished difference Result 333 states and 395 transitions. [2022-03-20 13:06:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 13:06:33,564 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-03-20 13:06:33,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:33,565 INFO L225 Difference]: With dead ends: 333 [2022-03-20 13:06:33,565 INFO L226 Difference]: Without dead ends: 327 [2022-03-20 13:06:33,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2986 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15398, Invalid=21658, Unknown=0, NotChecked=0, Total=37056 [2022-03-20 13:06:33,567 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 855 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:33,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 45 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:06:33,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-03-20 13:06:33,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 320. [2022-03-20 13:06:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1968253968253968) internal successors, (377), 315 states have internal predecessors, (377), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:33,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 381 transitions. [2022-03-20 13:06:33,700 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 381 transitions. Word has length 137 [2022-03-20 13:06:33,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:33,701 INFO L478 AbstractCegarLoop]: Abstraction has 320 states and 381 transitions. [2022-03-20 13:06:33,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:33,701 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 381 transitions. [2022-03-20 13:06:33,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-20 13:06:33,701 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:33,701 INFO L499 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:33,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-20 13:06:33,902 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:33,902 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:33,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:33,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1125357816, now seen corresponding path program 121 times [2022-03-20 13:06:33,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:33,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1162113604] [2022-03-20 13:06:33,903 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:06:33,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1125357816, now seen corresponding path program 122 times [2022-03-20 13:06:33,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:33,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864870164] [2022-03-20 13:06:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:33,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:35,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:35,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:35,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864870164] [2022-03-20 13:06:35,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864870164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:35,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261105036] [2022-03-20 13:06:35,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:06:35,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:35,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:35,212 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) [2022-03-20 13:06:35,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 13:06:35,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:06:35,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:35,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 13:06:35,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:35,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:39,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261105036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:39,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:39,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-03-20 13:06:39,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:39,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1162113604] [2022-03-20 13:06:39,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1162113604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:39,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:39,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 13:06:39,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961278054] [2022-03-20 13:06:39,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:39,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 13:06:39,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:39,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 13:06:39,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8013, Invalid=9279, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 13:06:39,353 INFO L87 Difference]: Start difference. First operand 320 states and 381 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:41,692 INFO L93 Difference]: Finished difference Result 338 states and 401 transitions. [2022-03-20 13:06:41,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 13:06:41,692 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-03-20 13:06:41,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:41,693 INFO L225 Difference]: With dead ends: 338 [2022-03-20 13:06:41,693 INFO L226 Difference]: Without dead ends: 332 [2022-03-20 13:06:41,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3066 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=15898, Invalid=22322, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 13:06:41,695 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 895 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:41,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 35 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:06:41,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-20 13:06:41,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 325. [2022-03-20 13:06:41,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.196875) internal successors, (383), 320 states have internal predecessors, (383), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 387 transitions. [2022-03-20 13:06:41,847 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 387 transitions. Word has length 139 [2022-03-20 13:06:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:41,848 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 387 transitions. [2022-03-20 13:06:41,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 387 transitions. [2022-03-20 13:06:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 13:06:41,848 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:41,849 INFO L499 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:41,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-20 13:06:42,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:42,050 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:42,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:42,050 INFO L85 PathProgramCache]: Analyzing trace with hash 504401603, now seen corresponding path program 123 times [2022-03-20 13:06:42,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:42,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [764533753] [2022-03-20 13:06:42,051 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:06:42,051 INFO L85 PathProgramCache]: Analyzing trace with hash 504401603, now seen corresponding path program 124 times [2022-03-20 13:06:42,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:42,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67744902] [2022-03-20 13:06:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:42,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:43,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:43,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:43,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67744902] [2022-03-20 13:06:43,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67744902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:43,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037040281] [2022-03-20 13:06:43,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:06:43,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:43,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:43,379 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) [2022-03-20 13:06:43,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 13:06:43,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:06:43,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:43,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 13:06:43,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:43,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:47,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037040281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:47,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:47,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-20 13:06:47,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:47,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [764533753] [2022-03-20 13:06:47,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [764533753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:47,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:47,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 13:06:47,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135245215] [2022-03-20 13:06:47,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:47,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 13:06:47,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:47,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 13:06:47,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8268, Invalid=9554, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 13:06:47,594 INFO L87 Difference]: Start difference. First operand 325 states and 387 transitions. Second operand has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:49,991 INFO L93 Difference]: Finished difference Result 343 states and 407 transitions. [2022-03-20 13:06:49,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 13:06:49,995 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-03-20 13:06:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:49,996 INFO L225 Difference]: With dead ends: 343 [2022-03-20 13:06:49,996 INFO L226 Difference]: Without dead ends: 337 [2022-03-20 13:06:49,998 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16406, Invalid=22996, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 13:06:49,998 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 914 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:49,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 45 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:06:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-03-20 13:06:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 330. [2022-03-20 13:06:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 325 states have (on average 1.196923076923077) internal successors, (389), 325 states have internal predecessors, (389), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 393 transitions. [2022-03-20 13:06:50,142 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 393 transitions. Word has length 141 [2022-03-20 13:06:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:50,143 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 393 transitions. [2022-03-20 13:06:50,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 393 transitions. [2022-03-20 13:06:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 13:06:50,144 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:50,144 INFO L499 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:50,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-20 13:06:50,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:50,344 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash -959859778, now seen corresponding path program 125 times [2022-03-20 13:06:50,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:50,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [532530411] [2022-03-20 13:06:50,345 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:06:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash -959859778, now seen corresponding path program 126 times [2022-03-20 13:06:50,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:50,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764086731] [2022-03-20 13:06:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:50,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:51,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:51,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:51,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764086731] [2022-03-20 13:06:51,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764086731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:51,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872324645] [2022-03-20 13:06:51,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:06:51,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:51,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:51,720 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) [2022-03-20 13:06:51,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 13:06:51,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2022-03-20 13:06:51,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:51,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 13:06:51,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:52,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:06:56,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872324645] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:56,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:56,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-03-20 13:06:56,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:56,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [532530411] [2022-03-20 13:06:56,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [532530411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:56,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:56,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 13:06:56,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470140518] [2022-03-20 13:06:56,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:56,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 13:06:56,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:56,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 13:06:56,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8527, Invalid=9833, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 13:06:56,096 INFO L87 Difference]: Start difference. First operand 330 states and 393 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:58,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:58,571 INFO L93 Difference]: Finished difference Result 348 states and 413 transitions. [2022-03-20 13:06:58,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 13:06:58,571 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 13:06:58,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:58,572 INFO L225 Difference]: With dead ends: 348 [2022-03-20 13:06:58,573 INFO L226 Difference]: Without dead ends: 342 [2022-03-20 13:06:58,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3229 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=16922, Invalid=23680, Unknown=0, NotChecked=0, Total=40602 [2022-03-20 13:06:58,575 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 897 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:58,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 60 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:06:58,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-20 13:06:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 335. [2022-03-20 13:06:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.196969696969697) internal successors, (395), 330 states have internal predecessors, (395), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 399 transitions. [2022-03-20 13:06:58,730 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 399 transitions. Word has length 143 [2022-03-20 13:06:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:58,730 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 399 transitions. [2022-03-20 13:06:58,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:06:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 399 transitions. [2022-03-20 13:06:58,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 13:06:58,731 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:58,731 INFO L499 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:58,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-20 13:06:58,931 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,SelfDestructingSolverStorable64 [2022-03-20 13:06:58,931 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:58,932 INFO L85 PathProgramCache]: Analyzing trace with hash 634226169, now seen corresponding path program 127 times [2022-03-20 13:06:58,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:58,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [476282484] [2022-03-20 13:06:58,932 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:06:58,932 INFO L85 PathProgramCache]: Analyzing trace with hash 634226169, now seen corresponding path program 128 times [2022-03-20 13:06:58,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:58,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59937825] [2022-03-20 13:06:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:58,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:00,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:00,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:00,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59937825] [2022-03-20 13:07:00,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59937825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:00,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734744195] [2022-03-20 13:07:00,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:07:00,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:00,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:00,324 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) [2022-03-20 13:07:00,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 13:07:00,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:07:00,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:00,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 13:07:00,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:00,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:04,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734744195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:07:04,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:07:04,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-03-20 13:07:04,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:04,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [476282484] [2022-03-20 13:07:04,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [476282484] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:04,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:04,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 13:07:04,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43036280] [2022-03-20 13:07:04,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:04,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 13:07:04,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:04,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 13:07:04,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8790, Invalid=10116, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 13:07:04,723 INFO L87 Difference]: Start difference. First operand 335 states and 399 transitions. Second operand has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:07,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:07,276 INFO L93 Difference]: Finished difference Result 353 states and 419 transitions. [2022-03-20 13:07:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 13:07:07,277 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-03-20 13:07:07,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:07,278 INFO L225 Difference]: With dead ends: 353 [2022-03-20 13:07:07,278 INFO L226 Difference]: Without dead ends: 347 [2022-03-20 13:07:07,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3312 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17446, Invalid=24374, Unknown=0, NotChecked=0, Total=41820 [2022-03-20 13:07:07,279 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 967 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:07,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 50 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:07:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-20 13:07:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 340. [2022-03-20 13:07:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.1970149253731344) internal successors, (401), 335 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 405 transitions. [2022-03-20 13:07:07,430 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 405 transitions. Word has length 145 [2022-03-20 13:07:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:07,430 INFO L478 AbstractCegarLoop]: Abstraction has 340 states and 405 transitions. [2022-03-20 13:07:07,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 405 transitions. [2022-03-20 13:07:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 13:07:07,431 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:07,431 INFO L499 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:07,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-20 13:07:07,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:07,632 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:07,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:07,632 INFO L85 PathProgramCache]: Analyzing trace with hash -752503436, now seen corresponding path program 129 times [2022-03-20 13:07:07,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:07,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1978710711] [2022-03-20 13:07:07,632 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:07:07,632 INFO L85 PathProgramCache]: Analyzing trace with hash -752503436, now seen corresponding path program 130 times [2022-03-20 13:07:07,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:07,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641698065] [2022-03-20 13:07:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:07,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:09,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:09,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:09,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641698065] [2022-03-20 13:07:09,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641698065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:09,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251662431] [2022-03-20 13:07:09,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:07:09,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:09,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:09,092 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) [2022-03-20 13:07:09,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 13:07:09,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:07:09,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:09,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 13:07:09,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:09,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:13,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251662431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:07:13,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:07:13,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-20 13:07:13,659 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:13,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1978710711] [2022-03-20 13:07:13,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1978710711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:13,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:13,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 13:07:13,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933683564] [2022-03-20 13:07:13,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:13,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 13:07:13,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:13,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 13:07:13,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9057, Invalid=10403, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 13:07:13,661 INFO L87 Difference]: Start difference. First operand 340 states and 405 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:16,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:16,674 INFO L93 Difference]: Finished difference Result 358 states and 425 transitions. [2022-03-20 13:07:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 13:07:16,675 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-03-20 13:07:16,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:16,680 INFO L225 Difference]: With dead ends: 358 [2022-03-20 13:07:16,680 INFO L226 Difference]: Without dead ends: 352 [2022-03-20 13:07:16,682 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3396 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=17978, Invalid=25078, Unknown=0, NotChecked=0, Total=43056 [2022-03-20 13:07:16,685 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1001 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:16,686 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 55 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:07:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-20 13:07:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 345. [2022-03-20 13:07:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 340 states have (on average 1.1970588235294117) internal successors, (407), 340 states have internal predecessors, (407), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 411 transitions. [2022-03-20 13:07:16,844 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 411 transitions. Word has length 147 [2022-03-20 13:07:16,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:16,844 INFO L478 AbstractCegarLoop]: Abstraction has 345 states and 411 transitions. [2022-03-20 13:07:16,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 411 transitions. [2022-03-20 13:07:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 13:07:16,845 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:16,845 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:16,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-20 13:07:17,054 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,SelfDestructingSolverStorable66 [2022-03-20 13:07:17,054 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:17,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:17,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1959792081, now seen corresponding path program 131 times [2022-03-20 13:07:17,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:17,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1906764882] [2022-03-20 13:07:17,055 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:07:17,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1959792081, now seen corresponding path program 132 times [2022-03-20 13:07:17,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:17,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119115151] [2022-03-20 13:07:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:17,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:18,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:18,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:18,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119115151] [2022-03-20 13:07:18,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119115151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:18,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224763519] [2022-03-20 13:07:18,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:07:18,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:18,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:18,558 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) [2022-03-20 13:07:18,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 13:07:18,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2022-03-20 13:07:18,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:18,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-20 13:07:18,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:18,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:23,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224763519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:07:23,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:07:23,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 142 [2022-03-20 13:07:23,319 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:23,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1906764882] [2022-03-20 13:07:23,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1906764882] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:23,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:23,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 13:07:23,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847204205] [2022-03-20 13:07:23,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:23,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 13:07:23,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:23,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 13:07:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9328, Invalid=10694, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 13:07:23,321 INFO L87 Difference]: Start difference. First operand 345 states and 411 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:26,061 INFO L93 Difference]: Finished difference Result 363 states and 431 transitions. [2022-03-20 13:07:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 13:07:26,061 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-03-20 13:07:26,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:26,062 INFO L225 Difference]: With dead ends: 363 [2022-03-20 13:07:26,062 INFO L226 Difference]: Without dead ends: 357 [2022-03-20 13:07:26,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3481 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=18518, Invalid=25792, Unknown=0, NotChecked=0, Total=44310 [2022-03-20 13:07:26,064 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1062 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:26,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 40 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:07:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-20 13:07:26,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 350. [2022-03-20 13:07:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.1971014492753622) internal successors, (413), 345 states have internal predecessors, (413), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 417 transitions. [2022-03-20 13:07:26,234 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 417 transitions. Word has length 149 [2022-03-20 13:07:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:26,234 INFO L478 AbstractCegarLoop]: Abstraction has 350 states and 417 transitions. [2022-03-20 13:07:26,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 417 transitions. [2022-03-20 13:07:26,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 13:07:26,235 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:26,235 INFO L499 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:26,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-20 13:07:26,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-20 13:07:26,436 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:26,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:26,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1771957290, now seen corresponding path program 133 times [2022-03-20 13:07:26,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:26,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [495188516] [2022-03-20 13:07:26,436 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:07:26,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1771957290, now seen corresponding path program 134 times [2022-03-20 13:07:26,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:26,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788847595] [2022-03-20 13:07:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:26,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:27,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:27,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:27,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788847595] [2022-03-20 13:07:27,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788847595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:27,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209124630] [2022-03-20 13:07:27,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:07:27,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:27,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:27,989 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) [2022-03-20 13:07:27,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 13:07:28,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:07:28,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:28,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 13:07:28,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:28,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:32,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209124630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:07:32,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:07:32,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-03-20 13:07:32,831 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:32,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [495188516] [2022-03-20 13:07:32,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [495188516] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:32,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:32,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 13:07:32,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59791124] [2022-03-20 13:07:32,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:32,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 13:07:32,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:32,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 13:07:32,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9603, Invalid=10989, Unknown=0, NotChecked=0, Total=20592 [2022-03-20 13:07:32,833 INFO L87 Difference]: Start difference. First operand 350 states and 417 transitions. Second operand has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:35,635 INFO L93 Difference]: Finished difference Result 368 states and 437 transitions. [2022-03-20 13:07:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 13:07:35,635 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-03-20 13:07:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:35,636 INFO L225 Difference]: With dead ends: 368 [2022-03-20 13:07:35,636 INFO L226 Difference]: Without dead ends: 362 [2022-03-20 13:07:35,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3567 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=19066, Invalid=26516, Unknown=0, NotChecked=0, Total=45582 [2022-03-20 13:07:35,638 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1042 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:35,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1042 Valid, 45 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:07:35,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-20 13:07:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 355. [2022-03-20 13:07:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 350 states have (on average 1.197142857142857) internal successors, (419), 350 states have internal predecessors, (419), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 423 transitions. [2022-03-20 13:07:35,818 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 423 transitions. Word has length 151 [2022-03-20 13:07:35,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:35,818 INFO L478 AbstractCegarLoop]: Abstraction has 355 states and 423 transitions. [2022-03-20 13:07:35,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 423 transitions. [2022-03-20 13:07:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 13:07:35,818 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:35,819 INFO L499 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:35,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-20 13:07:36,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-20 13:07:36,019 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:36,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:36,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1685410661, now seen corresponding path program 135 times [2022-03-20 13:07:36,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:36,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [722754572] [2022-03-20 13:07:36,020 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:07:36,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1685410661, now seen corresponding path program 136 times [2022-03-20 13:07:36,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:36,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50926680] [2022-03-20 13:07:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:36,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:37,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:37,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:37,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50926680] [2022-03-20 13:07:37,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50926680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:37,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214640467] [2022-03-20 13:07:37,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:07:37,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:37,586 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) [2022-03-20 13:07:37,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 13:07:37,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:07:37,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:37,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 13:07:37,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:37,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:42,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214640467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:07:42,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:07:42,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-20 13:07:42,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:42,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [722754572] [2022-03-20 13:07:42,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [722754572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:42,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:42,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 13:07:42,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176981839] [2022-03-20 13:07:42,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:42,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 13:07:42,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:42,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 13:07:42,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9882, Invalid=11288, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 13:07:42,517 INFO L87 Difference]: Start difference. First operand 355 states and 423 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:45,429 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2022-03-20 13:07:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 13:07:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-03-20 13:07:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:45,430 INFO L225 Difference]: With dead ends: 373 [2022-03-20 13:07:45,430 INFO L226 Difference]: Without dead ends: 367 [2022-03-20 13:07:45,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=19622, Invalid=27250, Unknown=0, NotChecked=0, Total=46872 [2022-03-20 13:07:45,432 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1484 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:45,432 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 40 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:07:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-03-20 13:07:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 360. [2022-03-20 13:07:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 355 states have (on average 1.1971830985915493) internal successors, (425), 355 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 429 transitions. [2022-03-20 13:07:45,606 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 429 transitions. Word has length 153 [2022-03-20 13:07:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:45,606 INFO L478 AbstractCegarLoop]: Abstraction has 360 states and 429 transitions. [2022-03-20 13:07:45,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 429 transitions. [2022-03-20 13:07:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 13:07:45,607 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:45,607 INFO L499 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:45,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-20 13:07:45,807 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,SelfDestructingSolverStorable69 [2022-03-20 13:07:45,807 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:45,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:45,808 INFO L85 PathProgramCache]: Analyzing trace with hash 118478816, now seen corresponding path program 137 times [2022-03-20 13:07:45,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:45,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1437341112] [2022-03-20 13:07:45,808 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:07:45,808 INFO L85 PathProgramCache]: Analyzing trace with hash 118478816, now seen corresponding path program 138 times [2022-03-20 13:07:45,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:45,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136027386] [2022-03-20 13:07:45,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:45,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:47,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:47,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:47,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136027386] [2022-03-20 13:07:47,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136027386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:47,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750933570] [2022-03-20 13:07:47,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:07:47,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:47,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:47,419 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) [2022-03-20 13:07:47,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 13:07:47,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2022-03-20 13:07:47,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:47,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 13:07:47,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:47,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:52,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750933570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:07:52,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:07:52,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-03-20 13:07:52,528 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:52,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1437341112] [2022-03-20 13:07:52,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1437341112] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:52,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:52,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 13:07:52,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705367110] [2022-03-20 13:07:52,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:52,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 13:07:52,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:52,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 13:07:52,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10165, Invalid=11591, Unknown=0, NotChecked=0, Total=21756 [2022-03-20 13:07:52,530 INFO L87 Difference]: Start difference. First operand 360 states and 429 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:55,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:55,507 INFO L93 Difference]: Finished difference Result 378 states and 449 transitions. [2022-03-20 13:07:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 13:07:55,507 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-03-20 13:07:55,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:55,509 INFO L225 Difference]: With dead ends: 378 [2022-03-20 13:07:55,509 INFO L226 Difference]: Without dead ends: 372 [2022-03-20 13:07:55,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=20186, Invalid=27994, Unknown=0, NotChecked=0, Total=48180 [2022-03-20 13:07:55,511 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1086 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:55,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 60 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:07:55,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-03-20 13:07:55,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 365. [2022-03-20 13:07:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.1972222222222222) internal successors, (431), 360 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 435 transitions. [2022-03-20 13:07:55,693 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 435 transitions. Word has length 155 [2022-03-20 13:07:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:55,693 INFO L478 AbstractCegarLoop]: Abstraction has 365 states and 435 transitions. [2022-03-20 13:07:55,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:07:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 435 transitions. [2022-03-20 13:07:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 13:07:55,694 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:55,694 INFO L499 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:55,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 13:07:55,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:55,907 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:55,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1830496667, now seen corresponding path program 139 times [2022-03-20 13:07:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:55,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [988760630] [2022-03-20 13:07:55,908 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:07:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1830496667, now seen corresponding path program 140 times [2022-03-20 13:07:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:55,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066424824] [2022-03-20 13:07:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:55,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:57,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:57,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:57,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066424824] [2022-03-20 13:07:57,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066424824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:57,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953622324] [2022-03-20 13:07:57,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:07:57,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:57,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:57,546 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) [2022-03-20 13:07:57,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 13:07:57,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:07:57,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:57,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 13:07:57,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:07:57,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:08:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:02,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953622324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:08:02,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:08:02,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-03-20 13:08:02,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:08:02,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [988760630] [2022-03-20 13:08:02,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [988760630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:08:02,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:08:02,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 13:08:02,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067580848] [2022-03-20 13:08:02,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:08:02,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 13:08:02,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:02,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 13:08:02,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10452, Invalid=11898, Unknown=0, NotChecked=0, Total=22350 [2022-03-20 13:08:02,763 INFO L87 Difference]: Start difference. First operand 365 states and 435 transitions. Second operand has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:08:05,881 INFO L93 Difference]: Finished difference Result 383 states and 455 transitions. [2022-03-20 13:08:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 13:08:05,881 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-03-20 13:08:05,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:08:05,882 INFO L225 Difference]: With dead ends: 383 [2022-03-20 13:08:05,882 INFO L226 Difference]: Without dead ends: 377 [2022-03-20 13:08:05,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3831 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=20758, Invalid=28748, Unknown=0, NotChecked=0, Total=49506 [2022-03-20 13:08:05,884 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 976 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:08:05,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 60 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:08:05,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-20 13:08:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 370. [2022-03-20 13:08:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.1972602739726028) internal successors, (437), 365 states have internal predecessors, (437), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 441 transitions. [2022-03-20 13:08:06,076 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 441 transitions. Word has length 157 [2022-03-20 13:08:06,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:08:06,076 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 441 transitions. [2022-03-20 13:08:06,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 441 transitions. [2022-03-20 13:08:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-20 13:08:06,078 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:08:06,078 INFO L499 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:08:06,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-20 13:08:06,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:06,291 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:08:06,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:08:06,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2107177110, now seen corresponding path program 141 times [2022-03-20 13:08:06,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:06,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [143741689] [2022-03-20 13:08:06,292 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:08:06,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2107177110, now seen corresponding path program 142 times [2022-03-20 13:08:06,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:08:06,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986531058] [2022-03-20 13:08:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:08:06,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:08:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:08,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:08:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:08,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:08:08,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986531058] [2022-03-20 13:08:08,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986531058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:08:08,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023961158] [2022-03-20 13:08:08,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:08:08,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:08,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:08:08,017 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) [2022-03-20 13:08:08,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 13:08:08,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:08:08,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:08:08,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 13:08:08,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:08:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:08,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:08:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:13,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023961158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:08:13,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:08:13,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-03-20 13:08:13,319 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:08:13,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [143741689] [2022-03-20 13:08:13,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [143741689] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:08:13,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:08:13,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 13:08:13,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033739807] [2022-03-20 13:08:13,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:08:13,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 13:08:13,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:13,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 13:08:13,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10743, Invalid=12209, Unknown=0, NotChecked=0, Total=22952 [2022-03-20 13:08:13,321 INFO L87 Difference]: Start difference. First operand 370 states and 441 transitions. Second operand has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:16,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:08:16,457 INFO L93 Difference]: Finished difference Result 388 states and 461 transitions. [2022-03-20 13:08:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 13:08:16,458 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-03-20 13:08:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:08:16,459 INFO L225 Difference]: With dead ends: 388 [2022-03-20 13:08:16,459 INFO L226 Difference]: Without dead ends: 382 [2022-03-20 13:08:16,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3921 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21338, Invalid=29512, Unknown=0, NotChecked=0, Total=50850 [2022-03-20 13:08:16,461 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1115 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:08:16,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 45 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:08:16,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-03-20 13:08:16,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 375. [2022-03-20 13:08:16,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 370 states have (on average 1.1972972972972973) internal successors, (443), 370 states have internal predecessors, (443), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 447 transitions. [2022-03-20 13:08:16,652 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 447 transitions. Word has length 159 [2022-03-20 13:08:16,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:08:16,652 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 447 transitions. [2022-03-20 13:08:16,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 447 transitions. [2022-03-20 13:08:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 13:08:16,653 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:08:16,653 INFO L499 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:08:16,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-20 13:08:16,853 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:16,854 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:08:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:08:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1709110481, now seen corresponding path program 143 times [2022-03-20 13:08:16,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:16,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1455823163] [2022-03-20 13:08:16,855 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:08:16,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1709110481, now seen corresponding path program 144 times [2022-03-20 13:08:16,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:08:16,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293863793] [2022-03-20 13:08:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:08:16,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:08:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:18,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:08:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:18,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:08:18,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293863793] [2022-03-20 13:08:18,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293863793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:08:18,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938734578] [2022-03-20 13:08:18,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:08:18,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:18,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:08:18,582 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) [2022-03-20 13:08:18,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 13:08:18,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2022-03-20 13:08:18,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:08:18,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 13:08:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:08:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:19,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:08:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:24,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938734578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:08:24,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:08:24,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 154 [2022-03-20 13:08:24,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:08:24,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1455823163] [2022-03-20 13:08:24,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1455823163] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:08:24,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:08:24,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 13:08:24,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360949219] [2022-03-20 13:08:24,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:08:24,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 13:08:24,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:24,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 13:08:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11038, Invalid=12524, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 13:08:24,069 INFO L87 Difference]: Start difference. First operand 375 states and 447 transitions. Second operand has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:08:27,356 INFO L93 Difference]: Finished difference Result 393 states and 467 transitions. [2022-03-20 13:08:27,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 13:08:27,356 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-03-20 13:08:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:08:27,357 INFO L225 Difference]: With dead ends: 393 [2022-03-20 13:08:27,358 INFO L226 Difference]: Without dead ends: 387 [2022-03-20 13:08:27,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4012 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=21926, Invalid=30286, Unknown=0, NotChecked=0, Total=52212 [2022-03-20 13:08:27,360 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1149 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:08:27,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 40 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:08:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-20 13:08:27,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 380. [2022-03-20 13:08:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.1973333333333334) internal successors, (449), 375 states have internal predecessors, (449), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 453 transitions. [2022-03-20 13:08:27,553 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 453 transitions. Word has length 161 [2022-03-20 13:08:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:08:27,553 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 453 transitions. [2022-03-20 13:08:27,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 453 transitions. [2022-03-20 13:08:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 13:08:27,554 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:08:27,554 INFO L499 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:08:27,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-20 13:08:27,755 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,SelfDestructingSolverStorable73 [2022-03-20 13:08:27,755 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:08:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:08:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1419169356, now seen corresponding path program 145 times [2022-03-20 13:08:27,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:27,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [791239597] [2022-03-20 13:08:27,756 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:08:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1419169356, now seen corresponding path program 146 times [2022-03-20 13:08:27,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:08:27,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278756220] [2022-03-20 13:08:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:08:27,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:08:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:29,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:08:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:29,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:08:29,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278756220] [2022-03-20 13:08:29,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278756220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:08:29,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377129864] [2022-03-20 13:08:29,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:08:29,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:29,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:08:29,522 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) [2022-03-20 13:08:29,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 13:08:29,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:08:29,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:08:29,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 13:08:29,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:08:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:29,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:08:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:35,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377129864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:08:35,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:08:35,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-03-20 13:08:35,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:08:35,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [791239597] [2022-03-20 13:08:35,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [791239597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:08:35,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:08:35,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 13:08:35,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454744911] [2022-03-20 13:08:35,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:08:35,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 13:08:35,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:35,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 13:08:35,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11337, Invalid=12843, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 13:08:35,063 INFO L87 Difference]: Start difference. First operand 380 states and 453 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:08:38,325 INFO L93 Difference]: Finished difference Result 398 states and 473 transitions. [2022-03-20 13:08:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 13:08:38,325 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-03-20 13:08:38,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:08:38,327 INFO L225 Difference]: With dead ends: 398 [2022-03-20 13:08:38,327 INFO L226 Difference]: Without dead ends: 392 [2022-03-20 13:08:38,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4104 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=22522, Invalid=31070, Unknown=0, NotChecked=0, Total=53592 [2022-03-20 13:08:38,330 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 967 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:08:38,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 65 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:08:38,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-03-20 13:08:38,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 385. [2022-03-20 13:08:38,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 380 states have (on average 1.1973684210526316) internal successors, (455), 380 states have internal predecessors, (455), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:38,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 459 transitions. [2022-03-20 13:08:38,531 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 459 transitions. Word has length 163 [2022-03-20 13:08:38,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:08:38,532 INFO L478 AbstractCegarLoop]: Abstraction has 385 states and 459 transitions. [2022-03-20 13:08:38,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:38,532 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 459 transitions. [2022-03-20 13:08:38,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 13:08:38,532 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:08:38,533 INFO L499 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:08:38,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-20 13:08:38,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:38,733 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:08:38,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:08:38,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1958622471, now seen corresponding path program 147 times [2022-03-20 13:08:38,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:38,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1522711085] [2022-03-20 13:08:38,734 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:08:38,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1958622471, now seen corresponding path program 148 times [2022-03-20 13:08:38,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:08:38,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20573884] [2022-03-20 13:08:38,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:08:38,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:08:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:40,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:08:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:40,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:08:40,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20573884] [2022-03-20 13:08:40,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20573884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:08:40,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480252698] [2022-03-20 13:08:40,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:08:40,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:40,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:08:40,568 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) [2022-03-20 13:08:40,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 13:08:40,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:08:40,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:08:40,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-20 13:08:40,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:08:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:40,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:08:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:46,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480252698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:08:46,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:08:46,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-03-20 13:08:46,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:08:46,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1522711085] [2022-03-20 13:08:46,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1522711085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:08:46,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:08:46,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 13:08:46,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723139809] [2022-03-20 13:08:46,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:08:46,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 13:08:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 13:08:46,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11640, Invalid=13166, Unknown=0, NotChecked=0, Total=24806 [2022-03-20 13:08:46,270 INFO L87 Difference]: Start difference. First operand 385 states and 459 transitions. Second operand has 80 states, 80 states have (on average 2.0125) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:08:49,692 INFO L93 Difference]: Finished difference Result 403 states and 479 transitions. [2022-03-20 13:08:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 13:08:49,692 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-03-20 13:08:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:08:49,694 INFO L225 Difference]: With dead ends: 403 [2022-03-20 13:08:49,694 INFO L226 Difference]: Without dead ends: 397 [2022-03-20 13:08:49,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4197 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=23126, Invalid=31864, Unknown=0, NotChecked=0, Total=54990 [2022-03-20 13:08:49,696 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1106 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:08:49,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 60 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:08:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-03-20 13:08:49,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 390. [2022-03-20 13:08:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 385 states have (on average 1.1974025974025975) internal successors, (461), 385 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 465 transitions. [2022-03-20 13:08:49,905 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 465 transitions. Word has length 165 [2022-03-20 13:08:49,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:08:49,905 INFO L478 AbstractCegarLoop]: Abstraction has 390 states and 465 transitions. [2022-03-20 13:08:49,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:08:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 465 transitions. [2022-03-20 13:08:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 13:08:49,907 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:08:49,907 INFO L499 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:08:49,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-20 13:08:50,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:50,123 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:08:50,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:08:50,123 INFO L85 PathProgramCache]: Analyzing trace with hash 682023170, now seen corresponding path program 149 times [2022-03-20 13:08:50,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:50,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [495340666] [2022-03-20 13:08:50,124 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:08:50,124 INFO L85 PathProgramCache]: Analyzing trace with hash 682023170, now seen corresponding path program 150 times [2022-03-20 13:08:50,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:08:50,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331144366] [2022-03-20 13:08:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:08:50,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:08:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:51,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:08:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:51,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:08:51,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331144366] [2022-03-20 13:08:51,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331144366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:08:51,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953433401] [2022-03-20 13:08:51,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:08:51,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:51,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:08:51,989 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) [2022-03-20 13:08:51,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 13:08:52,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2022-03-20 13:08:52,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:08:52,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 13:08:52,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:08:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:52,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:08:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:08:57,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953433401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:08:57,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:08:57,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 160 [2022-03-20 13:08:57,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:08:57,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [495340666] [2022-03-20 13:08:57,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [495340666] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:08:57,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:08:57,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 13:08:57,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080138041] [2022-03-20 13:08:57,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:08:57,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 13:08:57,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:57,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 13:08:57,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11947, Invalid=13493, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 13:08:57,882 INFO L87 Difference]: Start difference. First operand 390 states and 465 transitions. Second operand has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:09:01,388 INFO L93 Difference]: Finished difference Result 408 states and 485 transitions. [2022-03-20 13:09:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 13:09:01,395 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-03-20 13:09:01,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:09:01,397 INFO L225 Difference]: With dead ends: 408 [2022-03-20 13:09:01,397 INFO L226 Difference]: Without dead ends: 402 [2022-03-20 13:09:01,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4291 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=23738, Invalid=32668, Unknown=0, NotChecked=0, Total=56406 [2022-03-20 13:09:01,400 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1302 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:09:01,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1302 Valid, 60 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:09:01,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-03-20 13:09:01,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 395. [2022-03-20 13:09:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 390 states have (on average 1.1974358974358974) internal successors, (467), 390 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 471 transitions. [2022-03-20 13:09:01,608 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 471 transitions. Word has length 167 [2022-03-20 13:09:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:09:01,608 INFO L478 AbstractCegarLoop]: Abstraction has 395 states and 471 transitions. [2022-03-20 13:09:01,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:01,609 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 471 transitions. [2022-03-20 13:09:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 13:09:01,609 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:09:01,609 INFO L499 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:09:01,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-20 13:09:01,810 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,SelfDestructingSolverStorable76 [2022-03-20 13:09:01,810 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:09:01,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:09:01,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2064225731, now seen corresponding path program 151 times [2022-03-20 13:09:01,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:01,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1070274653] [2022-03-20 13:09:01,811 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:09:01,811 INFO L85 PathProgramCache]: Analyzing trace with hash -2064225731, now seen corresponding path program 152 times [2022-03-20 13:09:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:09:01,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434177489] [2022-03-20 13:09:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:09:01,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:09:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:03,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:09:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:03,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:09:03,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434177489] [2022-03-20 13:09:03,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434177489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:09:03,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331547818] [2022-03-20 13:09:03,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:09:03,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:03,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:09:03,721 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) [2022-03-20 13:09:03,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 13:09:03,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:09:03,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:09:03,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 13:09:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:09:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:04,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:09:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:09,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331547818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:09:09,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:09:09,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-03-20 13:09:09,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:09:09,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1070274653] [2022-03-20 13:09:09,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1070274653] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:09:09,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:09:09,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 13:09:09,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184573490] [2022-03-20 13:09:09,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:09:09,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 13:09:09,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:09,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 13:09:09,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12258, Invalid=13824, Unknown=0, NotChecked=0, Total=26082 [2022-03-20 13:09:09,792 INFO L87 Difference]: Start difference. First operand 395 states and 471 transitions. Second operand has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:13,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:09:13,405 INFO L93 Difference]: Finished difference Result 413 states and 491 transitions. [2022-03-20 13:09:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 13:09:13,405 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-03-20 13:09:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:09:13,407 INFO L225 Difference]: With dead ends: 413 [2022-03-20 13:09:13,407 INFO L226 Difference]: Without dead ends: 407 [2022-03-20 13:09:13,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4386 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=24358, Invalid=33482, Unknown=0, NotChecked=0, Total=57840 [2022-03-20 13:09:13,409 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1381 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:09:13,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1381 Valid, 40 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:09:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-20 13:09:13,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 400. [2022-03-20 13:09:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.1974683544303797) internal successors, (473), 395 states have internal predecessors, (473), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 477 transitions. [2022-03-20 13:09:13,625 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 477 transitions. Word has length 169 [2022-03-20 13:09:13,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:09:13,625 INFO L478 AbstractCegarLoop]: Abstraction has 400 states and 477 transitions. [2022-03-20 13:09:13,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:13,625 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 477 transitions. [2022-03-20 13:09:13,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-20 13:09:13,626 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:09:13,626 INFO L499 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:09:13,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-20 13:09:13,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-20 13:09:13,827 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:09:13,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:09:13,827 INFO L85 PathProgramCache]: Analyzing trace with hash 195467448, now seen corresponding path program 153 times [2022-03-20 13:09:13,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:13,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1090655150] [2022-03-20 13:09:13,828 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:09:13,828 INFO L85 PathProgramCache]: Analyzing trace with hash 195467448, now seen corresponding path program 154 times [2022-03-20 13:09:13,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:09:13,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632771955] [2022-03-20 13:09:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:09:13,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:09:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:15,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:09:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:15,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:09:15,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632771955] [2022-03-20 13:09:15,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632771955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:09:15,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048329543] [2022-03-20 13:09:15,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:09:15,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:15,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:09:15,786 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) [2022-03-20 13:09:15,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 13:09:15,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:09:15,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:09:15,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 13:09:15,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:09:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:16,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:09:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:21,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048329543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:09:21,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:09:21,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-03-20 13:09:21,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:09:21,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1090655150] [2022-03-20 13:09:21,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1090655150] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:09:21,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:09:21,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 13:09:21,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528768333] [2022-03-20 13:09:21,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:09:21,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 13:09:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:21,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 13:09:21,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12573, Invalid=14159, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 13:09:21,846 INFO L87 Difference]: Start difference. First operand 400 states and 477 transitions. Second operand has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:25,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:09:25,568 INFO L93 Difference]: Finished difference Result 418 states and 497 transitions. [2022-03-20 13:09:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 13:09:25,568 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-03-20 13:09:25,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:09:25,569 INFO L225 Difference]: With dead ends: 418 [2022-03-20 13:09:25,569 INFO L226 Difference]: Without dead ends: 412 [2022-03-20 13:09:25,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4482 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=24986, Invalid=34306, Unknown=0, NotChecked=0, Total=59292 [2022-03-20 13:09:25,572 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1016 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:09:25,572 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 65 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:09:25,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-03-20 13:09:25,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 405. [2022-03-20 13:09:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 400 states have (on average 1.1975) internal successors, (479), 400 states have internal predecessors, (479), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 483 transitions. [2022-03-20 13:09:25,788 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 483 transitions. Word has length 171 [2022-03-20 13:09:25,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:09:25,788 INFO L478 AbstractCegarLoop]: Abstraction has 405 states and 483 transitions. [2022-03-20 13:09:25,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 483 transitions. [2022-03-20 13:09:25,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 13:09:25,789 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:09:25,789 INFO L499 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:09:25,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-20 13:09:25,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:25,989 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:09:25,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:09:25,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1492839309, now seen corresponding path program 155 times [2022-03-20 13:09:25,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:25,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1373566598] [2022-03-20 13:09:25,990 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:09:25,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1492839309, now seen corresponding path program 156 times [2022-03-20 13:09:25,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:09:25,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716289226] [2022-03-20 13:09:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:09:25,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:09:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:27,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:09:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:27,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:09:27,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716289226] [2022-03-20 13:09:27,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716289226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:09:27,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907631099] [2022-03-20 13:09:27,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:09:27,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:27,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:09:27,992 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) [2022-03-20 13:09:28,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 13:09:28,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2022-03-20 13:09:28,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:09:28,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 13:09:28,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:09:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:28,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:09:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:34,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907631099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:09:34,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:09:34,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 166 [2022-03-20 13:09:34,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:09:34,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1373566598] [2022-03-20 13:09:34,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1373566598] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:09:34,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:09:34,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 13:09:34,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350485329] [2022-03-20 13:09:34,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:09:34,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 13:09:34,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:34,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 13:09:34,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12892, Invalid=14498, Unknown=0, NotChecked=0, Total=27390 [2022-03-20 13:09:34,363 INFO L87 Difference]: Start difference. First operand 405 states and 483 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:09:38,196 INFO L93 Difference]: Finished difference Result 423 states and 503 transitions. [2022-03-20 13:09:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 13:09:38,196 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-03-20 13:09:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:09:38,197 INFO L225 Difference]: With dead ends: 423 [2022-03-20 13:09:38,198 INFO L226 Difference]: Without dead ends: 417 [2022-03-20 13:09:38,199 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4579 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=25622, Invalid=35140, Unknown=0, NotChecked=0, Total=60762 [2022-03-20 13:09:38,200 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1128 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:09:38,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 55 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:09:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-03-20 13:09:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 410. [2022-03-20 13:09:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 405 states have (on average 1.1975308641975309) internal successors, (485), 405 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 489 transitions. [2022-03-20 13:09:38,418 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 489 transitions. Word has length 173 [2022-03-20 13:09:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:09:38,418 INFO L478 AbstractCegarLoop]: Abstraction has 410 states and 489 transitions. [2022-03-20 13:09:38,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 489 transitions. [2022-03-20 13:09:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-20 13:09:38,420 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:09:38,420 INFO L499 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:09:38,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-20 13:09:38,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:38,643 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:09:38,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:09:38,643 INFO L85 PathProgramCache]: Analyzing trace with hash -457994898, now seen corresponding path program 157 times [2022-03-20 13:09:38,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:38,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1809864538] [2022-03-20 13:09:38,644 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:09:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash -457994898, now seen corresponding path program 158 times [2022-03-20 13:09:38,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:09:38,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725814923] [2022-03-20 13:09:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:09:38,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:09:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:40,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:09:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:40,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:09:40,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725814923] [2022-03-20 13:09:40,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725814923] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:09:40,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855718166] [2022-03-20 13:09:40,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:09:40,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:40,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:09:40,683 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) [2022-03-20 13:09:40,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 13:09:40,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:09:40,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:09:40,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 13:09:40,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:09:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:41,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:09:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:47,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855718166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:09:47,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:09:47,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-03-20 13:09:47,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:09:47,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1809864538] [2022-03-20 13:09:47,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1809864538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:09:47,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:09:47,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 13:09:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878659844] [2022-03-20 13:09:47,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:09:47,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 13:09:47,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:47,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 13:09:47,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13215, Invalid=14841, Unknown=0, NotChecked=0, Total=28056 [2022-03-20 13:09:47,059 INFO L87 Difference]: Start difference. First operand 410 states and 489 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:09:50,933 INFO L93 Difference]: Finished difference Result 428 states and 509 transitions. [2022-03-20 13:09:50,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 13:09:50,934 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-03-20 13:09:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:09:50,935 INFO L225 Difference]: With dead ends: 428 [2022-03-20 13:09:50,935 INFO L226 Difference]: Without dead ends: 422 [2022-03-20 13:09:50,937 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=26266, Invalid=35984, Unknown=0, NotChecked=0, Total=62250 [2022-03-20 13:09:50,937 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1216 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:09:50,937 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 50 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:09:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-03-20 13:09:51,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 415. [2022-03-20 13:09:51,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 410 states have (on average 1.197560975609756) internal successors, (491), 410 states have internal predecessors, (491), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 495 transitions. [2022-03-20 13:09:51,161 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 495 transitions. Word has length 175 [2022-03-20 13:09:51,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:09:51,162 INFO L478 AbstractCegarLoop]: Abstraction has 415 states and 495 transitions. [2022-03-20 13:09:51,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:09:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 495 transitions. [2022-03-20 13:09:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-20 13:09:51,163 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:09:51,163 INFO L499 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:09:51,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-20 13:09:51,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:51,363 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:09:51,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:09:51,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1890038697, now seen corresponding path program 159 times [2022-03-20 13:09:51,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:51,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [481342092] [2022-03-20 13:09:51,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:09:51,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1890038697, now seen corresponding path program 160 times [2022-03-20 13:09:51,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:09:51,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961868665] [2022-03-20 13:09:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:09:51,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:09:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:53,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:09:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:53,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:09:53,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961868665] [2022-03-20 13:09:53,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961868665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:09:53,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016485697] [2022-03-20 13:09:53,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:09:53,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:53,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:09:53,432 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) [2022-03-20 13:09:53,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 13:09:53,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:09:53,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:09:53,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 13:09:53,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:09:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:53,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:09:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:09:59,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016485697] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:09:59,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:09:59,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-03-20 13:09:59,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:09:59,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [481342092] [2022-03-20 13:09:59,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [481342092] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:09:59,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:09:59,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 13:09:59,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788384152] [2022-03-20 13:09:59,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:09:59,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 13:09:59,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 13:09:59,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13542, Invalid=15188, Unknown=0, NotChecked=0, Total=28730 [2022-03-20 13:09:59,942 INFO L87 Difference]: Start difference. First operand 415 states and 495 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:03,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:10:03,911 INFO L93 Difference]: Finished difference Result 433 states and 515 transitions. [2022-03-20 13:10:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 13:10:03,911 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-03-20 13:10:03,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:10:03,913 INFO L225 Difference]: With dead ends: 433 [2022-03-20 13:10:03,913 INFO L226 Difference]: Without dead ends: 427 [2022-03-20 13:10:03,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4776 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=26918, Invalid=36838, Unknown=0, NotChecked=0, Total=63756 [2022-03-20 13:10:03,915 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1133 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:10:03,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1133 Valid, 65 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:10:03,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-03-20 13:10:04,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 420. [2022-03-20 13:10:04,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 415 states have (on average 1.1975903614457832) internal successors, (497), 415 states have internal predecessors, (497), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:04,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 501 transitions. [2022-03-20 13:10:04,145 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 501 transitions. Word has length 177 [2022-03-20 13:10:04,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:10:04,146 INFO L478 AbstractCegarLoop]: Abstraction has 420 states and 501 transitions. [2022-03-20 13:10:04,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:04,146 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 501 transitions. [2022-03-20 13:10:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-20 13:10:04,146 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:10:04,147 INFO L499 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:10:04,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-20 13:10:04,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:04,347 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:10:04,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:10:04,347 INFO L85 PathProgramCache]: Analyzing trace with hash -802474204, now seen corresponding path program 161 times [2022-03-20 13:10:04,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:04,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1231381544] [2022-03-20 13:10:04,348 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:10:04,348 INFO L85 PathProgramCache]: Analyzing trace with hash -802474204, now seen corresponding path program 162 times [2022-03-20 13:10:04,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:10:04,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714653243] [2022-03-20 13:10:04,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:10:04,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:10:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:06,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:10:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:10:06,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:10:06,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714653243] [2022-03-20 13:10:06,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714653243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:10:06,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329723382] [2022-03-20 13:10:06,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:10:06,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:06,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:10:06,475 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) [2022-03-20 13:10:06,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 13:10:06,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2022-03-20 13:10:06,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:10:06,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 13:10:06,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:10:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:10:06,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:10:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:10:13,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329723382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:10:13,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:10:13,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 172 [2022-03-20 13:10:13,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:10:13,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1231381544] [2022-03-20 13:10:13,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1231381544] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:10:13,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:10:13,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 13:10:13,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386605132] [2022-03-20 13:10:13,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:10:13,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 13:10:13,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 13:10:13,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13873, Invalid=15539, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 13:10:13,092 INFO L87 Difference]: Start difference. First operand 420 states and 501 transitions. Second operand has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:10:17,171 INFO L93 Difference]: Finished difference Result 438 states and 521 transitions. [2022-03-20 13:10:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 13:10:17,172 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-03-20 13:10:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:10:17,173 INFO L225 Difference]: With dead ends: 438 [2022-03-20 13:10:17,173 INFO L226 Difference]: Without dead ends: 432 [2022-03-20 13:10:17,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4876 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=27578, Invalid=37702, Unknown=0, NotChecked=0, Total=65280 [2022-03-20 13:10:17,175 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1296 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:10:17,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1296 Valid, 40 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:10:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-03-20 13:10:17,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 425. [2022-03-20 13:10:17,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 420 states have (on average 1.1976190476190476) internal successors, (503), 420 states have internal predecessors, (503), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 507 transitions. [2022-03-20 13:10:17,410 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 507 transitions. Word has length 179 [2022-03-20 13:10:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:10:17,410 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 507 transitions. [2022-03-20 13:10:17,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 507 transitions. [2022-03-20 13:10:17,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-20 13:10:17,411 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:10:17,411 INFO L499 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:10:17,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-20 13:10:17,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:17,611 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:10:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:10:17,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1557907423, now seen corresponding path program 163 times [2022-03-20 13:10:17,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:17,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1257526520] [2022-03-20 13:10:17,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:10:17,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1557907423, now seen corresponding path program 164 times [2022-03-20 13:10:17,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:10:17,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351081890] [2022-03-20 13:10:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:10:17,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:10:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:19,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:10:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:10:19,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:10:19,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351081890] [2022-03-20 13:10:19,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351081890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:10:19,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353746303] [2022-03-20 13:10:19,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:10:19,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:19,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:10:19,758 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) [2022-03-20 13:10:19,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-20 13:10:19,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:10:19,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:10:19,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-20 13:10:19,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:10:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:10:20,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:10:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:10:26,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353746303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:10:26,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:10:26,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-03-20 13:10:26,584 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:10:26,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1257526520] [2022-03-20 13:10:26,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1257526520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:10:26,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:10:26,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 13:10:26,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353314849] [2022-03-20 13:10:26,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:10:26,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 13:10:26,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 13:10:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14208, Invalid=15894, Unknown=0, NotChecked=0, Total=30102 [2022-03-20 13:10:26,587 INFO L87 Difference]: Start difference. First operand 425 states and 507 transitions. Second operand has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:30,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:10:30,738 INFO L93 Difference]: Finished difference Result 443 states and 527 transitions. [2022-03-20 13:10:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 13:10:30,739 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-03-20 13:10:30,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:10:30,740 INFO L225 Difference]: With dead ends: 443 [2022-03-20 13:10:30,740 INFO L226 Difference]: Without dead ends: 437 [2022-03-20 13:10:30,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4977 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=28246, Invalid=38576, Unknown=0, NotChecked=0, Total=66822 [2022-03-20 13:10:30,743 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1279 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:10:30,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1279 Valid, 40 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:10:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-03-20 13:10:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 430. [2022-03-20 13:10:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 425 states have (on average 1.1976470588235295) internal successors, (509), 425 states have internal predecessors, (509), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 513 transitions. [2022-03-20 13:10:30,982 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 513 transitions. Word has length 181 [2022-03-20 13:10:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:10:30,982 INFO L478 AbstractCegarLoop]: Abstraction has 430 states and 513 transitions. [2022-03-20 13:10:30,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 513 transitions. [2022-03-20 13:10:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 13:10:30,983 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:10:30,983 INFO L499 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:10:31,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-20 13:10:31,183 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,SelfDestructingSolverStorable83 [2022-03-20 13:10:31,184 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:10:31,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:10:31,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2141918682, now seen corresponding path program 165 times [2022-03-20 13:10:31,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:31,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1194099754] [2022-03-20 13:10:31,185 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:10:31,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2141918682, now seen corresponding path program 166 times [2022-03-20 13:10:31,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:10:31,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608650830] [2022-03-20 13:10:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:10:31,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:10:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:33,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:10:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:10:33,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:10:33,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608650830] [2022-03-20 13:10:33,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608650830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:10:33,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475353814] [2022-03-20 13:10:33,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:10:33,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:33,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:10:33,430 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) [2022-03-20 13:10:33,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-20 13:10:33,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:10:33,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:10:33,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 13:10:33,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:10:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:10:33,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:10:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:10:40,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475353814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:10:40,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:10:40,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-03-20 13:10:40,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:10:40,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1194099754] [2022-03-20 13:10:40,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1194099754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:10:40,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:10:40,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 13:10:40,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325153122] [2022-03-20 13:10:40,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:10:40,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 13:10:40,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:40,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 13:10:40,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14547, Invalid=16253, Unknown=0, NotChecked=0, Total=30800 [2022-03-20 13:10:40,385 INFO L87 Difference]: Start difference. First operand 430 states and 513 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:10:44,742 INFO L93 Difference]: Finished difference Result 448 states and 533 transitions. [2022-03-20 13:10:44,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 13:10:44,742 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-03-20 13:10:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:10:44,744 INFO L225 Difference]: With dead ends: 448 [2022-03-20 13:10:44,744 INFO L226 Difference]: Without dead ends: 442 [2022-03-20 13:10:44,746 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5079 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=28922, Invalid=39460, Unknown=0, NotChecked=0, Total=68382 [2022-03-20 13:10:44,747 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1649 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:10:44,747 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1649 Valid, 40 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:10:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-03-20 13:10:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 435. [2022-03-20 13:10:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 430 states have (on average 1.197674418604651) internal successors, (515), 430 states have internal predecessors, (515), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 519 transitions. [2022-03-20 13:10:44,992 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 519 transitions. Word has length 183 [2022-03-20 13:10:44,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:10:44,993 INFO L478 AbstractCegarLoop]: Abstraction has 435 states and 519 transitions. [2022-03-20 13:10:44,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:44,993 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 519 transitions. [2022-03-20 13:10:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 13:10:44,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:10:44,994 INFO L499 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:10:45,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-20 13:10:45,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:45,207 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:10:45,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:10:45,208 INFO L85 PathProgramCache]: Analyzing trace with hash 736022805, now seen corresponding path program 167 times [2022-03-20 13:10:45,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:45,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1607645510] [2022-03-20 13:10:45,208 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:10:45,208 INFO L85 PathProgramCache]: Analyzing trace with hash 736022805, now seen corresponding path program 168 times [2022-03-20 13:10:45,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:10:45,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286821079] [2022-03-20 13:10:45,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:10:45,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:10:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:47,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:10:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:10:47,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:10:47,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286821079] [2022-03-20 13:10:47,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286821079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:10:47,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498404658] [2022-03-20 13:10:47,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:10:47,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:47,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:10:47,524 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) [2022-03-20 13:10:47,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-20 13:10:47,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2022-03-20 13:10:47,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:10:47,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 13:10:47,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:10:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:10:48,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:10:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:10:54,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498404658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:10:54,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:10:54,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 178 [2022-03-20 13:10:54,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:10:54,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1607645510] [2022-03-20 13:10:54,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1607645510] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:10:54,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:10:54,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-20 13:10:54,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585357793] [2022-03-20 13:10:54,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:10:54,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 13:10:54,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:54,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 13:10:54,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14890, Invalid=16616, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 13:10:54,721 INFO L87 Difference]: Start difference. First operand 435 states and 519 transitions. Second operand has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:10:59,124 INFO L93 Difference]: Finished difference Result 453 states and 539 transitions. [2022-03-20 13:10:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 13:10:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-03-20 13:10:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:10:59,126 INFO L225 Difference]: With dead ends: 453 [2022-03-20 13:10:59,126 INFO L226 Difference]: Without dead ends: 447 [2022-03-20 13:10:59,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5182 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=29606, Invalid=40354, Unknown=0, NotChecked=0, Total=69960 [2022-03-20 13:10:59,130 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1314 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:10:59,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 45 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:10:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-03-20 13:10:59,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 440. [2022-03-20 13:10:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.1977011494252874) internal successors, (521), 435 states have internal predecessors, (521), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 525 transitions. [2022-03-20 13:10:59,383 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 525 transitions. Word has length 185 [2022-03-20 13:10:59,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:10:59,383 INFO L478 AbstractCegarLoop]: Abstraction has 440 states and 525 transitions. [2022-03-20 13:10:59,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:59,384 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 525 transitions. [2022-03-20 13:10:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 13:10:59,384 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:10:59,384 INFO L499 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:10:59,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-20 13:10:59,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:59,585 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:10:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:10:59,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1710184048, now seen corresponding path program 169 times [2022-03-20 13:10:59,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:59,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1231194587] [2022-03-20 13:10:59,586 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:10:59,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1710184048, now seen corresponding path program 170 times [2022-03-20 13:10:59,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:10:59,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691273105] [2022-03-20 13:10:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:10:59,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:10:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:01,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:11:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:11:01,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:11:01,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691273105] [2022-03-20 13:11:01,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691273105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:11:01,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107053338] [2022-03-20 13:11:01,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:11:01,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:01,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:11:01,932 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) [2022-03-20 13:11:01,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-20 13:11:02,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:11:02,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:11:02,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 13:11:02,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:11:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:11:02,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:11:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:11:09,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107053338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:11:09,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:11:09,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-03-20 13:11:09,236 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:11:09,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1231194587] [2022-03-20 13:11:09,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1231194587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:11:09,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:11:09,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 13:11:09,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032939410] [2022-03-20 13:11:09,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:11:09,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 13:11:09,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:09,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 13:11:09,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15237, Invalid=16983, Unknown=0, NotChecked=0, Total=32220 [2022-03-20 13:11:09,239 INFO L87 Difference]: Start difference. First operand 440 states and 525 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:13,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:11:13,716 INFO L93 Difference]: Finished difference Result 458 states and 545 transitions. [2022-03-20 13:11:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 13:11:13,716 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-03-20 13:11:13,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:11:13,718 INFO L225 Difference]: With dead ends: 458 [2022-03-20 13:11:13,718 INFO L226 Difference]: Without dead ends: 452 [2022-03-20 13:11:13,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5286 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=30298, Invalid=41258, Unknown=0, NotChecked=0, Total=71556 [2022-03-20 13:11:13,721 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1492 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:11:13,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1492 Valid, 55 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:11:13,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-20 13:11:13,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 445. [2022-03-20 13:11:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 440 states have (on average 1.1977272727272728) internal successors, (527), 440 states have internal predecessors, (527), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 531 transitions. [2022-03-20 13:11:13,978 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 531 transitions. Word has length 187 [2022-03-20 13:11:13,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:11:13,978 INFO L478 AbstractCegarLoop]: Abstraction has 445 states and 531 transitions. [2022-03-20 13:11:13,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 531 transitions. [2022-03-20 13:11:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-20 13:11:13,979 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:11:13,979 INFO L499 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:11:13,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-20 13:11:14,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:14,179 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:11:14,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:11:14,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1127108427, now seen corresponding path program 171 times [2022-03-20 13:11:14,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:14,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [88342072] [2022-03-20 13:11:14,180 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:11:14,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1127108427, now seen corresponding path program 172 times [2022-03-20 13:11:14,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:11:14,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14011251] [2022-03-20 13:11:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:11:14,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:11:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:16,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:11:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:11:16,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:11:16,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14011251] [2022-03-20 13:11:16,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14011251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:11:16,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088293644] [2022-03-20 13:11:16,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:11:16,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:16,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:11:16,485 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) [2022-03-20 13:11:16,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-20 13:11:16,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:11:16,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:11:16,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-20 13:11:16,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:11:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:11:16,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:11:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:11:23,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088293644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:11:23,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:11:23,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-03-20 13:11:23,686 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:11:23,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [88342072] [2022-03-20 13:11:23,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [88342072] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:11:23,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:11:23,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-20 13:11:23,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377022921] [2022-03-20 13:11:23,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:11:23,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 13:11:23,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:23,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 13:11:23,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15588, Invalid=17354, Unknown=0, NotChecked=0, Total=32942 [2022-03-20 13:11:23,689 INFO L87 Difference]: Start difference. First operand 445 states and 531 transitions. Second operand has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:28,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:11:28,281 INFO L93 Difference]: Finished difference Result 463 states and 551 transitions. [2022-03-20 13:11:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 13:11:28,281 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-03-20 13:11:28,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:11:28,283 INFO L225 Difference]: With dead ends: 463 [2022-03-20 13:11:28,283 INFO L226 Difference]: Without dead ends: 457 [2022-03-20 13:11:28,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5391 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=30998, Invalid=42172, Unknown=0, NotChecked=0, Total=73170 [2022-03-20 13:11:28,286 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1265 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:11:28,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1265 Valid, 55 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:11:28,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-03-20 13:11:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 450. [2022-03-20 13:11:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 445 states have (on average 1.1977528089887641) internal successors, (533), 445 states have internal predecessors, (533), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 537 transitions. [2022-03-20 13:11:28,548 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 537 transitions. Word has length 189 [2022-03-20 13:11:28,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:11:28,548 INFO L478 AbstractCegarLoop]: Abstraction has 450 states and 537 transitions. [2022-03-20 13:11:28,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:28,549 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 537 transitions. [2022-03-20 13:11:28,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-20 13:11:28,550 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:11:28,550 INFO L499 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:11:28,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-20 13:11:28,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:28,763 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:11:28,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:11:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash 460943942, now seen corresponding path program 173 times [2022-03-20 13:11:28,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:28,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [163605086] [2022-03-20 13:11:28,764 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:11:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash 460943942, now seen corresponding path program 174 times [2022-03-20 13:11:28,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:11:28,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93191095] [2022-03-20 13:11:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:11:28,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:11:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:31,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:11:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:11:31,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:11:31,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93191095] [2022-03-20 13:11:31,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93191095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:11:31,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053787694] [2022-03-20 13:11:31,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:11:31,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:31,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:11:31,198 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) [2022-03-20 13:11:31,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-20 13:11:31,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2022-03-20 13:11:31,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:11:31,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 13:11:31,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:11:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:11:31,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:11:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:11:38,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053787694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:11:38,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:11:38,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 184 [2022-03-20 13:11:38,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:11:38,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [163605086] [2022-03-20 13:11:38,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [163605086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:11:38,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:11:38,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 13:11:38,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577062024] [2022-03-20 13:11:38,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:11:38,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 13:11:38,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:38,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 13:11:38,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15943, Invalid=17729, Unknown=0, NotChecked=0, Total=33672 [2022-03-20 13:11:38,814 INFO L87 Difference]: Start difference. First operand 450 states and 537 transitions. Second operand has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:11:43,430 INFO L93 Difference]: Finished difference Result 468 states and 557 transitions. [2022-03-20 13:11:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-20 13:11:43,430 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-03-20 13:11:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:11:43,431 INFO L225 Difference]: With dead ends: 468 [2022-03-20 13:11:43,431 INFO L226 Difference]: Without dead ends: 462 [2022-03-20 13:11:43,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5497 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=31706, Invalid=43096, Unknown=0, NotChecked=0, Total=74802 [2022-03-20 13:11:43,434 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1410 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:11:43,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1410 Valid, 70 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:11:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-03-20 13:11:43,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 455. [2022-03-20 13:11:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 450 states have (on average 1.1977777777777778) internal successors, (539), 450 states have internal predecessors, (539), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 543 transitions. [2022-03-20 13:11:43,714 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 543 transitions. Word has length 191 [2022-03-20 13:11:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:11:43,715 INFO L478 AbstractCegarLoop]: Abstraction has 455 states and 543 transitions. [2022-03-20 13:11:43,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 543 transitions. [2022-03-20 13:11:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-20 13:11:43,716 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:11:43,716 INFO L499 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:11:43,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-20 13:11:43,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:43,916 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:11:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:11:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash 227000961, now seen corresponding path program 175 times [2022-03-20 13:11:43,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:43,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2100365646] [2022-03-20 13:11:43,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:11:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash 227000961, now seen corresponding path program 176 times [2022-03-20 13:11:43,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:11:43,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019802119] [2022-03-20 13:11:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:11:43,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:11:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:46,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:11:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:11:46,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:11:46,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019802119] [2022-03-20 13:11:46,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019802119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:11:46,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645758142] [2022-03-20 13:11:46,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:11:46,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:46,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:11:46,303 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) [2022-03-20 13:11:46,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-20 13:11:46,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:11:46,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:11:46,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-20 13:11:46,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:11:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:11:46,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:11:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:11:53,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645758142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:11:53,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:11:53,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-03-20 13:11:53,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:11:53,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2100365646] [2022-03-20 13:11:53,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2100365646] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:11:53,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:11:53,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-20 13:11:53,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017600885] [2022-03-20 13:11:53,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:11:53,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 13:11:53,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:53,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 13:11:53,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16302, Invalid=18108, Unknown=0, NotChecked=0, Total=34410 [2022-03-20 13:11:53,913 INFO L87 Difference]: Start difference. First operand 455 states and 543 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:11:58,833 INFO L93 Difference]: Finished difference Result 473 states and 563 transitions. [2022-03-20 13:11:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 13:11:58,833 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-03-20 13:11:58,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:11:58,835 INFO L225 Difference]: With dead ends: 473 [2022-03-20 13:11:58,835 INFO L226 Difference]: Without dead ends: 467 [2022-03-20 13:11:58,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5604 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=32422, Invalid=44030, Unknown=0, NotChecked=0, Total=76452 [2022-03-20 13:11:58,837 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1324 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:11:58,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1324 Valid, 60 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:11:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-03-20 13:11:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 460. [2022-03-20 13:11:59,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 455 states have (on average 1.1978021978021978) internal successors, (545), 455 states have internal predecessors, (545), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 549 transitions. [2022-03-20 13:11:59,112 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 549 transitions. Word has length 193 [2022-03-20 13:11:59,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:11:59,112 INFO L478 AbstractCegarLoop]: Abstraction has 460 states and 549 transitions. [2022-03-20 13:11:59,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 549 transitions. [2022-03-20 13:11:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-20 13:11:59,113 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:11:59,113 INFO L499 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:11:59,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-20 13:11:59,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-20 13:11:59,314 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:11:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:11:59,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1253904388, now seen corresponding path program 177 times [2022-03-20 13:11:59,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:59,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2105807177] [2022-03-20 13:11:59,314 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:11:59,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1253904388, now seen corresponding path program 178 times [2022-03-20 13:11:59,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:11:59,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592191719] [2022-03-20 13:11:59,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:11:59,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:11:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:12:01,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:12:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:12:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:12:01,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:12:01,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592191719] [2022-03-20 13:12:01,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592191719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:12:01,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004156131] [2022-03-20 13:12:01,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:12:01,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:12:01,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:12:01,867 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) [2022-03-20 13:12:01,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-20 13:12:01,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:12:01,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:12:01,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 13:12:01,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:12:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:12:02,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:12:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:12:09,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004156131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:12:09,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:12:09,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 188 [2022-03-20 13:12:09,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:12:09,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2105807177] [2022-03-20 13:12:09,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2105807177] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:12:09,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:12:09,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 13:12:09,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766307136] [2022-03-20 13:12:09,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:12:09,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-20 13:12:09,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:12:09,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-20 13:12:09,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16665, Invalid=18491, Unknown=0, NotChecked=0, Total=35156 [2022-03-20 13:12:09,763 INFO L87 Difference]: Start difference. First operand 460 states and 549 transitions. Second operand has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:12:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:12:14,740 INFO L93 Difference]: Finished difference Result 478 states and 569 transitions. [2022-03-20 13:12:14,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-20 13:12:14,741 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-03-20 13:12:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:12:14,742 INFO L225 Difference]: With dead ends: 478 [2022-03-20 13:12:14,742 INFO L226 Difference]: Without dead ends: 472 [2022-03-20 13:12:14,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5712 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=33146, Invalid=44974, Unknown=0, NotChecked=0, Total=78120 [2022-03-20 13:12:14,745 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1319 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:12:14,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 45 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:12:14,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-03-20 13:12:15,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 465. [2022-03-20 13:12:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 460 states have (on average 1.1978260869565218) internal successors, (551), 460 states have internal predecessors, (551), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:12:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 555 transitions. [2022-03-20 13:12:15,026 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 555 transitions. Word has length 195 [2022-03-20 13:12:15,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:12:15,027 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 555 transitions. [2022-03-20 13:12:15,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:12:15,027 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 555 transitions. [2022-03-20 13:12:15,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-20 13:12:15,028 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:12:15,028 INFO L499 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:12:15,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-20 13:12:15,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:12:15,228 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:12:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:12:15,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1525197495, now seen corresponding path program 179 times [2022-03-20 13:12:15,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:12:15,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [307353815] [2022-03-20 13:12:15,229 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:12:15,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1525197495, now seen corresponding path program 180 times [2022-03-20 13:12:15,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:12:15,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836418239] [2022-03-20 13:12:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:12:15,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:12:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:12:17,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:12:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:12:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:12:17,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:12:17,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836418239] [2022-03-20 13:12:17,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836418239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:12:17,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466731304] [2022-03-20 13:12:17,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:12:17,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:12:17,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:12:17,760 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) [2022-03-20 13:12:17,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-20 13:12:17,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-03-20 13:12:17,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:12:17,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-20 13:12:17,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:12:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:12:18,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:12:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:12:25,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466731304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:12:25,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:12:25,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-03-20 13:12:25,755 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:12:25,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [307353815] [2022-03-20 13:12:25,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [307353815] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:12:25,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:12:25,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-20 13:12:25,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770418809] [2022-03-20 13:12:25,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:12:25,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 13:12:25,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:12:25,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 13:12:25,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17032, Invalid=18878, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 13:12:25,758 INFO L87 Difference]: Start difference. First operand 465 states and 555 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:12:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:12:30,813 INFO L93 Difference]: Finished difference Result 483 states and 575 transitions. [2022-03-20 13:12:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 13:12:30,814 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-03-20 13:12:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:12:30,815 INFO L225 Difference]: With dead ends: 483 [2022-03-20 13:12:30,815 INFO L226 Difference]: Without dead ends: 477 [2022-03-20 13:12:30,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5821 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=33878, Invalid=45928, Unknown=0, NotChecked=0, Total=79806 [2022-03-20 13:12:30,818 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1296 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:12:30,818 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1296 Valid, 70 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:12:30,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-20 13:12:31,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 470. [2022-03-20 13:12:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 1.1978494623655913) internal successors, (557), 465 states have internal predecessors, (557), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:12:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 561 transitions. [2022-03-20 13:12:31,105 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 561 transitions. Word has length 197 [2022-03-20 13:12:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:12:31,105 INFO L478 AbstractCegarLoop]: Abstraction has 470 states and 561 transitions. [2022-03-20 13:12:31,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:12:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 561 transitions. [2022-03-20 13:12:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-20 13:12:31,106 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:12:31,106 INFO L499 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:12:31,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-20 13:12:31,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:12:31,306 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:12:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:12:31,307 INFO L85 PathProgramCache]: Analyzing trace with hash 772448946, now seen corresponding path program 181 times [2022-03-20 13:12:31,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:12:31,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [662080227] [2022-03-20 13:12:31,307 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:12:31,308 INFO L85 PathProgramCache]: Analyzing trace with hash 772448946, now seen corresponding path program 182 times [2022-03-20 13:12:31,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:12:31,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254065081] [2022-03-20 13:12:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:12:31,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:12:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:12:33,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:12:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:12:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:12:33,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:12:33,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254065081] [2022-03-20 13:12:33,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254065081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:12:33,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872870830] [2022-03-20 13:12:33,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:12:33,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:12:33,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:12:33,936 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) [2022-03-20 13:12:33,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-20 13:12:34,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:12:34,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:12:34,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-20 13:12:34,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:12:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:12:34,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:12:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:12:42,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872870830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:12:42,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:12:42,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 192 [2022-03-20 13:12:42,097 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:12:42,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [662080227] [2022-03-20 13:12:42,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [662080227] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:12:42,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:12:42,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-20 13:12:42,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482630562] [2022-03-20 13:12:42,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:12:42,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-20 13:12:42,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:12:42,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-20 13:12:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17403, Invalid=19269, Unknown=0, NotChecked=0, Total=36672 [2022-03-20 13:12:42,100 INFO L87 Difference]: Start difference. First operand 470 states and 561 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:12:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:12:47,239 INFO L93 Difference]: Finished difference Result 488 states and 581 transitions. [2022-03-20 13:12:47,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-20 13:12:47,239 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-03-20 13:12:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:12:47,241 INFO L225 Difference]: With dead ends: 488 [2022-03-20 13:12:47,241 INFO L226 Difference]: Without dead ends: 482 [2022-03-20 13:12:47,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5931 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=34618, Invalid=46892, Unknown=0, NotChecked=0, Total=81510 [2022-03-20 13:12:47,244 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1447 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:12:47,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 55 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:12:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-03-20 13:12:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 475. [2022-03-20 13:12:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 470 states have (on average 1.1978723404255318) internal successors, (563), 470 states have internal predecessors, (563), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:12:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 567 transitions. [2022-03-20 13:12:47,536 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 567 transitions. Word has length 199 [2022-03-20 13:12:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:12:47,536 INFO L478 AbstractCegarLoop]: Abstraction has 475 states and 567 transitions. [2022-03-20 13:12:47,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:12:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 567 transitions. [2022-03-20 13:12:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-20 13:12:47,537 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:12:47,537 INFO L499 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:12:47,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-20 13:12:47,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:12:47,739 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:12:47,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:12:47,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1064400915, now seen corresponding path program 183 times [2022-03-20 13:12:47,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:12:47,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1341622699] [2022-03-20 13:12:47,739 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:12:47,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1064400915, now seen corresponding path program 184 times [2022-03-20 13:12:47,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:12:47,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688743602] [2022-03-20 13:12:47,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:12:47,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:12:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:12:50,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:12:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:12:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:12:50,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:12:50,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688743602] [2022-03-20 13:12:50,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688743602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:12:50,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687152937] [2022-03-20 13:12:50,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:12:50,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:12:50,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:12:50,405 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) [2022-03-20 13:12:50,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-20 13:12:50,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:12:50,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:12:50,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 13:12:50,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:12:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:12:50,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:12:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:12:58,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687152937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:12:58,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:12:58,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-03-20 13:12:58,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:12:58,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1341622699] [2022-03-20 13:12:58,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1341622699] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:12:58,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:12:58,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-20 13:12:58,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644999046] [2022-03-20 13:12:58,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:12:58,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 13:12:58,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:12:58,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 13:12:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17778, Invalid=19664, Unknown=0, NotChecked=0, Total=37442 [2022-03-20 13:12:58,745 INFO L87 Difference]: Start difference. First operand 475 states and 567 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:13:04,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:13:04,089 INFO L93 Difference]: Finished difference Result 493 states and 587 transitions. [2022-03-20 13:13:04,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 13:13:04,089 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-03-20 13:13:04,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:13:04,090 INFO L225 Difference]: With dead ends: 493 [2022-03-20 13:13:04,090 INFO L226 Difference]: Without dead ends: 487 [2022-03-20 13:13:04,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6042 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=35366, Invalid=47866, Unknown=0, NotChecked=0, Total=83232 [2022-03-20 13:13:04,093 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1481 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:13:04,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 45 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:13:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-03-20 13:13:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 480. [2022-03-20 13:13:04,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 475 states have (on average 1.1978947368421053) internal successors, (569), 475 states have internal predecessors, (569), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:13:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 573 transitions. [2022-03-20 13:13:04,391 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 573 transitions. Word has length 201 [2022-03-20 13:13:04,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:13:04,391 INFO L478 AbstractCegarLoop]: Abstraction has 480 states and 573 transitions. [2022-03-20 13:13:04,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:13:04,391 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 573 transitions. [2022-03-20 13:13:04,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-20 13:13:04,392 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:13:04,392 INFO L499 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:13:04,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-20 13:13:04,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:13:04,593 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:13:04,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:13:04,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1045558680, now seen corresponding path program 185 times [2022-03-20 13:13:04,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:13:04,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1496438366] [2022-03-20 13:13:04,594 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:13:04,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1045558680, now seen corresponding path program 186 times [2022-03-20 13:13:04,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:13:04,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530551796] [2022-03-20 13:13:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:13:04,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:13:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:13:07,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:13:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:13:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:13:07,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:13:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530551796] [2022-03-20 13:13:07,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530551796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:13:07,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57202610] [2022-03-20 13:13:07,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:13:07,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:13:07,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:13:07,284 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) [2022-03-20 13:13:07,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-20 13:13:07,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 94 check-sat command(s) [2022-03-20 13:13:07,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:13:07,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 13:13:07,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:13:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:13:07,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:13:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:13:15,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57202610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:13:15,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:13:15,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 196 [2022-03-20 13:13:15,738 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:13:15,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1496438366] [2022-03-20 13:13:15,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1496438366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:13:15,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:13:15,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-20 13:13:15,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797491394] [2022-03-20 13:13:15,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:13:15,739 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-20 13:13:15,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:13:15,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-20 13:13:15,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18157, Invalid=20063, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 13:13:15,742 INFO L87 Difference]: Start difference. First operand 480 states and 573 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:13:21,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:13:21,144 INFO L93 Difference]: Finished difference Result 498 states and 593 transitions. [2022-03-20 13:13:21,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-20 13:13:21,145 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-03-20 13:13:21,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:13:21,146 INFO L225 Difference]: With dead ends: 498 [2022-03-20 13:13:21,146 INFO L226 Difference]: Without dead ends: 492 [2022-03-20 13:13:21,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6154 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=36122, Invalid=48850, Unknown=0, NotChecked=0, Total=84972 [2022-03-20 13:13:21,149 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1479 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:13:21,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1479 Valid, 40 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:13:21,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-20 13:13:21,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 485. [2022-03-20 13:13:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 480 states have (on average 1.1979166666666667) internal successors, (575), 480 states have internal predecessors, (575), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:13:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 579 transitions. [2022-03-20 13:13:21,453 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 579 transitions. Word has length 203 [2022-03-20 13:13:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:13:21,454 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 579 transitions. [2022-03-20 13:13:21,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:13:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 579 transitions. [2022-03-20 13:13:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-20 13:13:21,455 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:13:21,455 INFO L499 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:13:21,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-20 13:13:21,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:13:21,655 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:13:21,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:13:21,656 INFO L85 PathProgramCache]: Analyzing trace with hash -118040029, now seen corresponding path program 187 times [2022-03-20 13:13:21,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:13:21,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1181200421] [2022-03-20 13:13:21,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:13:21,657 INFO L85 PathProgramCache]: Analyzing trace with hash -118040029, now seen corresponding path program 188 times [2022-03-20 13:13:21,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:13:21,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085908684] [2022-03-20 13:13:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:13:21,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:13:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:13:24,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:13:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:13:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:13:24,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:13:24,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085908684] [2022-03-20 13:13:24,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085908684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:13:24,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7862306] [2022-03-20 13:13:24,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:13:24,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:13:24,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:13:24,404 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) [2022-03-20 13:13:24,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-20 13:13:24,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:13:24,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:13:24,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-20 13:13:24,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:13:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:13:24,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:13:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:13:32,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7862306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:13:32,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:13:32,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-03-20 13:13:32,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:13:32,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1181200421] [2022-03-20 13:13:32,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1181200421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:13:32,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:13:32,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-20 13:13:32,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504807723] [2022-03-20 13:13:32,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:13:32,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-20 13:13:32,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:13:32,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-20 13:13:32,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18540, Invalid=20466, Unknown=0, NotChecked=0, Total=39006 [2022-03-20 13:13:32,934 INFO L87 Difference]: Start difference. First operand 485 states and 579 transitions. Second operand has 100 states, 100 states have (on average 2.01) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:13:38,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:13:38,459 INFO L93 Difference]: Finished difference Result 503 states and 599 transitions. [2022-03-20 13:13:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 13:13:38,460 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-03-20 13:13:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:13:38,461 INFO L225 Difference]: With dead ends: 503 [2022-03-20 13:13:38,461 INFO L226 Difference]: Without dead ends: 497 [2022-03-20 13:13:38,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6267 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=36886, Invalid=49844, Unknown=0, NotChecked=0, Total=86730 [2022-03-20 13:13:38,464 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1624 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1624 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:13:38,464 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1624 Valid, 55 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:13:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-03-20 13:13:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 490. [2022-03-20 13:13:38,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 485 states have (on average 1.1979381443298969) internal successors, (581), 485 states have internal predecessors, (581), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:13:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 585 transitions. [2022-03-20 13:13:38,791 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 585 transitions. Word has length 205 [2022-03-20 13:13:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:13:38,792 INFO L478 AbstractCegarLoop]: Abstraction has 490 states and 585 transitions. [2022-03-20 13:13:38,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:13:38,792 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 585 transitions. [2022-03-20 13:13:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-20 13:13:38,793 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:13:38,793 INFO L499 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:13:38,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-20 13:13:38,993 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,SelfDestructingSolverStorable95 [2022-03-20 13:13:38,993 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:13:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:13:38,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2125813986, now seen corresponding path program 189 times [2022-03-20 13:13:38,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:13:38,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1609412000] [2022-03-20 13:13:38,995 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:13:38,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2125813986, now seen corresponding path program 190 times [2022-03-20 13:13:38,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:13:38,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102934404] [2022-03-20 13:13:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:13:38,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:13:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:13:41,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:13:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:13:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:13:41,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:13:41,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102934404] [2022-03-20 13:13:41,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102934404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:13:41,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282868174] [2022-03-20 13:13:41,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:13:41,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:13:41,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:13:41,773 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) [2022-03-20 13:13:41,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-20 13:13:41,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:13:41,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:13:41,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 13:13:41,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:13:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:13:42,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:13:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:13:50,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282868174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:13:50,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:13:50,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 200 [2022-03-20 13:13:50,470 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:13:50,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1609412000] [2022-03-20 13:13:50,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1609412000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:13:50,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:13:50,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-20 13:13:50,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698796823] [2022-03-20 13:13:50,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:13:50,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-20 13:13:50,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:13:50,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-20 13:13:50,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18927, Invalid=20873, Unknown=0, NotChecked=0, Total=39800 [2022-03-20 13:13:50,473 INFO L87 Difference]: Start difference. First operand 490 states and 585 transitions. Second operand has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:13:56,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:13:56,193 INFO L93 Difference]: Finished difference Result 508 states and 605 transitions. [2022-03-20 13:13:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-20 13:13:56,193 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-03-20 13:13:56,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:13:56,194 INFO L225 Difference]: With dead ends: 508 [2022-03-20 13:13:56,194 INFO L226 Difference]: Without dead ends: 502 [2022-03-20 13:13:56,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6381 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=37658, Invalid=50848, Unknown=0, NotChecked=0, Total=88506 [2022-03-20 13:13:56,198 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1526 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:13:56,198 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1526 Valid, 55 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:13:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-03-20 13:13:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 495. [2022-03-20 13:13:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 490 states have (on average 1.1979591836734693) internal successors, (587), 490 states have internal predecessors, (587), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:13:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 591 transitions. [2022-03-20 13:13:56,529 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 591 transitions. Word has length 207 [2022-03-20 13:13:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:13:56,530 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 591 transitions. [2022-03-20 13:13:56,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:13:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 591 transitions. [2022-03-20 13:13:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-20 13:13:56,531 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:13:56,531 INFO L499 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:13:56,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-20 13:13:56,731 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,SelfDestructingSolverStorable96 [2022-03-20 13:13:56,731 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:13:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:13:56,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1138696537, now seen corresponding path program 191 times [2022-03-20 13:13:56,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:13:56,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [555481557] [2022-03-20 13:13:56,732 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:13:56,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1138696537, now seen corresponding path program 192 times [2022-03-20 13:13:56,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:13:56,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865812256] [2022-03-20 13:13:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:13:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:13:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:13:59,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:13:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:13:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:13:59,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:13:59,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865812256] [2022-03-20 13:13:59,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865812256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:13:59,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042261969] [2022-03-20 13:13:59,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:13:59,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:13:59,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:13:59,558 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) [2022-03-20 13:13:59,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-20 13:13:59,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2022-03-20 13:13:59,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:13:59,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 13:13:59,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:14:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:14:00,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:14:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:14:08,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042261969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:14:08,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:14:08,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2022-03-20 13:14:08,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:14:08,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [555481557] [2022-03-20 13:14:08,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [555481557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:14:08,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:14:08,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-20 13:14:08,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860293059] [2022-03-20 13:14:08,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:14:08,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-20 13:14:08,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:14:08,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-20 13:14:08,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19318, Invalid=21284, Unknown=0, NotChecked=0, Total=40602 [2022-03-20 13:14:08,461 INFO L87 Difference]: Start difference. First operand 495 states and 591 transitions. Second operand has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:14:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:14:14,372 INFO L93 Difference]: Finished difference Result 513 states and 611 transitions. [2022-03-20 13:14:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-20 13:14:14,372 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-03-20 13:14:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:14:14,373 INFO L225 Difference]: With dead ends: 513 [2022-03-20 13:14:14,373 INFO L226 Difference]: Without dead ends: 507 [2022-03-20 13:14:14,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6496 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=38438, Invalid=51862, Unknown=0, NotChecked=0, Total=90300 [2022-03-20 13:14:14,377 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1554 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:14:14,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1554 Valid, 60 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:14:14,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-20 13:14:14,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 500. [2022-03-20 13:14:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 495 states have (on average 1.197979797979798) internal successors, (593), 495 states have internal predecessors, (593), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:14:14,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 597 transitions. [2022-03-20 13:14:14,701 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 597 transitions. Word has length 209 [2022-03-20 13:14:14,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:14:14,702 INFO L478 AbstractCegarLoop]: Abstraction has 500 states and 597 transitions. [2022-03-20 13:14:14,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:14:14,702 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 597 transitions. [2022-03-20 13:14:14,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-20 13:14:14,703 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:14:14,703 INFO L499 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:14:14,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-20 13:14:14,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:14:14,903 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:14:14,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:14:14,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1287784236, now seen corresponding path program 193 times [2022-03-20 13:14:14,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:14:14,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1369829792] [2022-03-20 13:14:14,904 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:14:14,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1287784236, now seen corresponding path program 194 times [2022-03-20 13:14:14,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:14:14,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453520729] [2022-03-20 13:14:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:14:14,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:14:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:14:17,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:14:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:14:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:14:17,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:14:17,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453520729] [2022-03-20 13:14:17,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453520729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:14:17,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31708469] [2022-03-20 13:14:17,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:14:17,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:14:17,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:14:17,855 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) [2022-03-20 13:14:17,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-20 13:14:17,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:14:17,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:14:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-20 13:14:17,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:14:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:14:18,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:14:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:14:26,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31708469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:14:26,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:14:26,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2022-03-20 13:14:26,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:14:26,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1369829792] [2022-03-20 13:14:26,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1369829792] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:14:26,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:14:26,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-20 13:14:26,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200960717] [2022-03-20 13:14:26,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:14:26,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-20 13:14:26,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:14:26,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-20 13:14:26,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19713, Invalid=21699, Unknown=0, NotChecked=0, Total=41412 [2022-03-20 13:14:26,938 INFO L87 Difference]: Start difference. First operand 500 states and 597 transitions. Second operand has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)