/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-acceleration/functions_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 18:01:00,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:01:00,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:01:00,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:01:00,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 18:01:00,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 18:01:00,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 18:01:00,658 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:01:00,667 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:01:00,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:01:00,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:01:00,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:01:00,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:01:00,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:01:00,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:01:00,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:01:00,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:01:00,670 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:01:00,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:01:00,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:01:00,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:01:00,671 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:01:00,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:01:00,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:01:00,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:01:00,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:01:00,671 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:01:00,671 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:01:00,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:01:00,671 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:01:00,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:01:00,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:01:00,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:01:00,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:01:00,889 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:01:00,889 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:01:00,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2022-03-20 18:01:00,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b44e1738/c12eb934369d438ea6472bb970abebd4/FLAG5a2b73b06 [2022-03-20 18:01:01,235 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:01:01,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2022-03-20 18:01:01,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b44e1738/c12eb934369d438ea6472bb970abebd4/FLAG5a2b73b06 [2022-03-20 18:01:01,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b44e1738/c12eb934369d438ea6472bb970abebd4 [2022-03-20 18:01:01,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:01:01,675 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:01:01,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:01:01,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:01:01,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:01:01,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:01:01" (1/1) ... [2022-03-20 18:01:01,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eda3dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:01:01, skipping insertion in model container [2022-03-20 18:01:01,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:01:01" (1/1) ... [2022-03-20 18:01:01,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:01:01,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:01:01,801 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-acceleration/functions_1-2.c[325,338] [2022-03-20 18:01:01,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:01:01,813 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:01:01,820 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-acceleration/functions_1-2.c[325,338] [2022-03-20 18:01:01,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:01:01,829 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:01:01,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:01:01 WrapperNode [2022-03-20 18:01:01,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:01:01,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:01:01,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:01:01,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:01:01,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:01:01" (1/1) ... [2022-03-20 18:01:01,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:01:01" (1/1) ... [2022-03-20 18:01:01,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:01:01" (1/1) ... [2022-03-20 18:01:01,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:01:01" (1/1) ... [2022-03-20 18:01:01,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:01:01" (1/1) ... [2022-03-20 18:01:01,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:01:01" (1/1) ... [2022-03-20 18:01:01,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:01:01" (1/1) ... [2022-03-20 18:01:01,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:01:01,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:01:01,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:01:01,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:01:01,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:01:01" (1/1) ... [2022-03-20 18:01:01,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:01:01,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:01,886 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 18:01:01,891 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 18:01:01,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:01:01,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:01:01,918 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:01:01,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 18:01:01,918 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-03-20 18:01:01,918 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:01:01,918 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:01:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:01:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:01:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:01:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:01:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-03-20 18:01:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:01:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:01:01,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:01:01,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:01:01,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:01:01,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:01:01,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:01:01,965 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:01:01,966 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:01:02,067 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:01:02,071 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:01:02,072 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 18:01:02,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:01:02 BoogieIcfgContainer [2022-03-20 18:01:02,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:01:02,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:01:02,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:01:02,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:01:02,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:01:01" (1/3) ... [2022-03-20 18:01:02,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797550c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:01:02, skipping insertion in model container [2022-03-20 18:01:02,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:01:01" (2/3) ... [2022-03-20 18:01:02,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797550c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:01:02, skipping insertion in model container [2022-03-20 18:01:02,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:01:02" (3/3) ... [2022-03-20 18:01:02,088 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-2.c [2022-03-20 18:01:02,096 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:01:02,096 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:01:02,131 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:01:02,136 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 18:01:02,136 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:01:02,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:01:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 18:01:02,150 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:02,150 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:02,150 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:02,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:02,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1649640916, now seen corresponding path program 1 times [2022-03-20 18:01:02,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:02,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [459351897] [2022-03-20 18:01:02,166 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:01:02,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1649640916, now seen corresponding path program 2 times [2022-03-20 18:01:02,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:02,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443095227] [2022-03-20 18:01:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:02,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:02,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:02,262 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 18:01:02,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:02,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443095227] [2022-03-20 18:01:02,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443095227] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:02,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:02,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:01:02,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:02,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [459351897] [2022-03-20 18:01:02,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [459351897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:02,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:02,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:01:02,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552903212] [2022-03-20 18:01:02,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:02,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 18:01:02,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:02,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 18:01:02,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 18:01:02,288 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:02,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:02,341 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-20 18:01:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 18:01:02,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2022-03-20 18:01:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:02,349 INFO L225 Difference]: With dead ends: 34 [2022-03-20 18:01:02,349 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 18:01:02,351 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 18:01:02,354 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:02,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:01:02,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 18:01:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 18:01:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:01:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-03-20 18:01:02,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2022-03-20 18:01:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:02,383 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-03-20 18:01:02,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:02,384 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-03-20 18:01:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 18:01:02,384 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:02,384 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:02,385 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 18:01:02,385 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1655182042, now seen corresponding path program 1 times [2022-03-20 18:01:02,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:02,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [847145171] [2022-03-20 18:01:02,386 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:01:02,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1655182042, now seen corresponding path program 2 times [2022-03-20 18:01:02,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:02,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153606538] [2022-03-20 18:01:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:02,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:02,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:02,466 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 18:01:02,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:02,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153606538] [2022-03-20 18:01:02,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153606538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:02,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:02,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:01:02,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:02,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [847145171] [2022-03-20 18:01:02,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [847145171] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:02,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:02,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:01:02,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100391507] [2022-03-20 18:01:02,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:02,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 18:01:02,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 18:01:02,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 18:01:02,469 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:02,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:02,510 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-03-20 18:01:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 18:01:02,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2022-03-20 18:01:02,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:02,512 INFO L225 Difference]: With dead ends: 25 [2022-03-20 18:01:02,512 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 18:01:02,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 18:01:02,513 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:02,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:01:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 18:01:02,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-03-20 18:01:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:01:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-20 18:01:02,519 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2022-03-20 18:01:02,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:02,520 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-20 18:01:02,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:02,520 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-20 18:01:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 18:01:02,520 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:02,520 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 18:01:02,520 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 18:01:02,521 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:02,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1503524740, now seen corresponding path program 1 times [2022-03-20 18:01:02,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:02,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2142462941] [2022-03-20 18:01:02,598 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:02,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1236910030, now seen corresponding path program 1 times [2022-03-20 18:01:02,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:02,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479168120] [2022-03-20 18:01:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:02,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:02,619 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:02,646 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:02,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1503524740, now seen corresponding path program 2 times [2022-03-20 18:01:02,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:02,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731283260] [2022-03-20 18:01:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:02,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:02,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:02,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:02,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:02,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731283260] [2022-03-20 18:01:02,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731283260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:02,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197188385] [2022-03-20 18:01:02,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:02,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:02,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:02,777 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 18:01:02,781 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 18:01:02,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:02,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:02,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 18:01:02,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:02,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:01:03,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197188385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:03,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:03,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-20 18:01:03,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:03,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2142462941] [2022-03-20 18:01:03,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2142462941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:03,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:03,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:01:03,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818991254] [2022-03-20 18:01:03,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:03,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 18:01:03,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:03,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 18:01:03,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:01:03,091 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:01:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:03,187 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-03-20 18:01:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 18:01:03,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-20 18:01:03,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:03,188 INFO L225 Difference]: With dead ends: 28 [2022-03-20 18:01:03,188 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 18:01:03,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-20 18:01:03,197 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:03,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:01:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 18:01:03,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-03-20 18:01:03,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:01:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-20 18:01:03,203 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2022-03-20 18:01:03,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:03,203 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-20 18:01:03,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:01:03,203 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-20 18:01:03,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 18:01:03,204 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:03,205 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:03,225 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 18:01:03,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:03,425 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:03,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:03,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1270987934, now seen corresponding path program 3 times [2022-03-20 18:01:03,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:03,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1548532088] [2022-03-20 18:01:03,464 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:03,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1296015374, now seen corresponding path program 1 times [2022-03-20 18:01:03,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:03,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292056196] [2022-03-20 18:01:03,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:03,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:03,506 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:03,523 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:03,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1270987934, now seen corresponding path program 4 times [2022-03-20 18:01:03,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:03,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836786870] [2022-03-20 18:01:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:03,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:03,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:03,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:03,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 18:01:03,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:03,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836786870] [2022-03-20 18:01:03,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836786870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:03,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948827546] [2022-03-20 18:01:03,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:03,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:03,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:03,653 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 18:01:03,655 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 18:01:03,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:03,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:03,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 18:01:03,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 18:01:03,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 18:01:04,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948827546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:04,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:04,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 17 [2022-03-20 18:01:04,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:04,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1548532088] [2022-03-20 18:01:04,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1548532088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:04,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:04,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:01:04,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919489432] [2022-03-20 18:01:04,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:04,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 18:01:04,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:04,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 18:01:04,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-20 18:01:04,018 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:01:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:04,212 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-03-20 18:01:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 18:01:04,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2022-03-20 18:01:04,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:04,213 INFO L225 Difference]: With dead ends: 31 [2022-03-20 18:01:04,213 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 18:01:04,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-03-20 18:01:04,214 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:04,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 47 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:04,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 18:01:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-03-20 18:01:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:01:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-20 18:01:04,219 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2022-03-20 18:01:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:04,223 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-20 18:01:04,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:01:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-20 18:01:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 18:01:04,224 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:04,224 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:04,243 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 18:01:04,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-20 18:01:04,444 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash -371085120, now seen corresponding path program 5 times [2022-03-20 18:01:04,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:04,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1605741287] [2022-03-20 18:01:04,477 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1355120718, now seen corresponding path program 1 times [2022-03-20 18:01:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:04,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245972406] [2022-03-20 18:01:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:04,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:04,493 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:04,514 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:04,515 INFO L85 PathProgramCache]: Analyzing trace with hash -371085120, now seen corresponding path program 6 times [2022-03-20 18:01:04,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:04,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619642621] [2022-03-20 18:01:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:04,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:04,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:04,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:04,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:04,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:01:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 18:01:04,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:04,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619642621] [2022-03-20 18:01:04,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619642621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:04,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915054112] [2022-03-20 18:01:04,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:04,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:04,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:04,663 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 18:01:04,664 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 18:01:04,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 18:01:04,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:04,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 18:01:04,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 18:01:04,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 18:01:05,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915054112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:05,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:05,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 22 [2022-03-20 18:01:05,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:05,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1605741287] [2022-03-20 18:01:05,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1605741287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:05,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:05,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 18:01:05,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655000597] [2022-03-20 18:01:05,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:05,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 18:01:05,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:05,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 18:01:05,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-20 18:01:05,097 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:01:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:05,288 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-20 18:01:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 18:01:05,289 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-03-20 18:01:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:05,290 INFO L225 Difference]: With dead ends: 34 [2022-03-20 18:01:05,290 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 18:01:05,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2022-03-20 18:01:05,291 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:05,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 58 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:05,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 18:01:05,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-03-20 18:01:05,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 18:01:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 18:01:05,296 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 29 [2022-03-20 18:01:05,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:05,297 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 18:01:05,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:01:05,297 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 18:01:05,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 18:01:05,297 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:05,297 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:05,319 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 18:01:05,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:05,511 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:05,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1928781922, now seen corresponding path program 7 times [2022-03-20 18:01:05,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:05,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [745695579] [2022-03-20 18:01:05,543 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:05,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1414226062, now seen corresponding path program 1 times [2022-03-20 18:01:05,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:05,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674549597] [2022-03-20 18:01:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:05,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:05,551 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:05,557 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:05,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1928781922, now seen corresponding path program 8 times [2022-03-20 18:01:05,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:05,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068847300] [2022-03-20 18:01:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:05,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:05,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:05,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:05,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:05,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:01:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:05,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:01:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 18:01:05,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:05,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068847300] [2022-03-20 18:01:05,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068847300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:05,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907219953] [2022-03-20 18:01:05,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:05,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:05,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:05,732 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 18:01:05,762 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 18:01:05,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:05,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:05,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 18:01:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 18:01:05,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 18:01:06,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907219953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:06,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:06,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 15] total 27 [2022-03-20 18:01:06,293 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [745695579] [2022-03-20 18:01:06,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [745695579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:06,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:06,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 18:01:06,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174863955] [2022-03-20 18:01:06,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:06,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 18:01:06,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:06,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 18:01:06,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-03-20 18:01:06,295 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 18:01:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:06,551 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-03-20 18:01:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 18:01:06,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2022-03-20 18:01:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:06,552 INFO L225 Difference]: With dead ends: 37 [2022-03-20 18:01:06,552 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 18:01:06,553 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:01:06,553 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:06,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 69 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:06,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 18:01:06,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-03-20 18:01:06,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 18:01:06,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-20 18:01:06,559 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 35 [2022-03-20 18:01:06,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:06,559 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-20 18:01:06,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 18:01:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-20 18:01:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 18:01:06,560 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:06,560 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:06,579 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 18:01:06,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:06,775 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:06,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:06,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1005752324, now seen corresponding path program 9 times [2022-03-20 18:01:06,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:06,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [759402852] [2022-03-20 18:01:06,802 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:06,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1473331406, now seen corresponding path program 1 times [2022-03-20 18:01:06,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:06,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024214325] [2022-03-20 18:01:06,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:06,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:06,809 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:06,814 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:06,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1005752324, now seen corresponding path program 10 times [2022-03-20 18:01:06,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:06,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867740912] [2022-03-20 18:01:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:06,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:06,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:06,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:06,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:06,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:01:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:07,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:01:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:07,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:01:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 18:01:07,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:07,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867740912] [2022-03-20 18:01:07,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867740912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:07,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051269665] [2022-03-20 18:01:07,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:07,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:07,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:07,035 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 18:01:07,036 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 18:01:07,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:07,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:07,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 18:01:07,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 18:01:07,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:07,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051269665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:07,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:07,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 18] total 32 [2022-03-20 18:01:07,755 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:07,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [759402852] [2022-03-20 18:01:07,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [759402852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:07,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:07,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:01:07,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055088139] [2022-03-20 18:01:07,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:07,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 18:01:07,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:07,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 18:01:07,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:01:07,757 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 18:01:08,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:08,082 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-03-20 18:01:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:01:08,082 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-03-20 18:01:08,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:08,084 INFO L225 Difference]: With dead ends: 40 [2022-03-20 18:01:08,084 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 18:01:08,085 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:01:08,086 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:08,086 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 70 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:08,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 18:01:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-03-20 18:01:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 18:01:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-03-20 18:01:08,101 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 41 [2022-03-20 18:01:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:08,101 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-03-20 18:01:08,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 18:01:08,101 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-03-20 18:01:08,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 18:01:08,102 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:08,102 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:08,119 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 18:01:08,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10,SelfDestructingSolverStorable11 [2022-03-20 18:01:08,320 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:08,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:08,320 INFO L85 PathProgramCache]: Analyzing trace with hash 119505370, now seen corresponding path program 11 times [2022-03-20 18:01:08,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:08,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [717748808] [2022-03-20 18:01:08,346 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:08,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1532436750, now seen corresponding path program 1 times [2022-03-20 18:01:08,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:08,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387463291] [2022-03-20 18:01:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:08,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:08,352 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:08,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash 119505370, now seen corresponding path program 12 times [2022-03-20 18:01:08,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:08,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507880625] [2022-03-20 18:01:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:08,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:08,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:08,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:08,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:08,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:01:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:08,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:01:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:08,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:01:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:08,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:01:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 18:01:08,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:08,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507880625] [2022-03-20 18:01:08,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507880625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:08,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441976436] [2022-03-20 18:01:08,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:08,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:08,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:08,589 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 18:01:08,590 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 18:01:08,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 18:01:08,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:08,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 18:01:08,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 18:01:08,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 18:01:09,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441976436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:09,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:09,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 21] total 37 [2022-03-20 18:01:09,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:09,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [717748808] [2022-03-20 18:01:09,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [717748808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:09,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:09,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:01:09,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705523450] [2022-03-20 18:01:09,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:09,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:01:09,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:09,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:01:09,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:01:09,640 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 18:01:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:10,100 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-03-20 18:01:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:01:10,100 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2022-03-20 18:01:10,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:10,101 INFO L225 Difference]: With dead ends: 43 [2022-03-20 18:01:10,101 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 18:01:10,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=401, Invalid=2149, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:01:10,103 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:10,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 81 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:01:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 18:01:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-03-20 18:01:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 18:01:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-03-20 18:01:10,108 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 47 [2022-03-20 18:01:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:10,108 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-03-20 18:01:10,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 18:01:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-03-20 18:01:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 18:01:10,109 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:10,109 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:10,117 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 18:01:10,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:10,315 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:10,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1581790520, now seen corresponding path program 13 times [2022-03-20 18:01:10,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:10,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1097675365] [2022-03-20 18:01:10,344 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1591542094, now seen corresponding path program 1 times [2022-03-20 18:01:10,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:10,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238732279] [2022-03-20 18:01:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:10,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:10,349 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:10,353 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:10,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1581790520, now seen corresponding path program 14 times [2022-03-20 18:01:10,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:10,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922128701] [2022-03-20 18:01:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:10,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:10,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:10,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:10,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:10,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:01:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:10,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:01:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:10,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:01:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:10,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:01:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:10,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:01:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-20 18:01:10,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:10,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922128701] [2022-03-20 18:01:10,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922128701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:10,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319496238] [2022-03-20 18:01:10,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:10,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:10,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:10,640 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 18:01:10,663 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 18:01:10,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:10,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:10,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 18:01:10,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-20 18:01:10,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 18:01:11,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319496238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:11,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:11,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 24] total 42 [2022-03-20 18:01:11,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:11,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1097675365] [2022-03-20 18:01:11,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1097675365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:11,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:11,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 18:01:11,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923376] [2022-03-20 18:01:11,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:11,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 18:01:11,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:11,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 18:01:11,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:01:11,897 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 18:01:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:12,426 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-03-20 18:01:12,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 18:01:12,427 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 53 [2022-03-20 18:01:12,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:12,428 INFO L225 Difference]: With dead ends: 46 [2022-03-20 18:01:12,428 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 18:01:12,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=499, Invalid=2807, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:01:12,429 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:12,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 102 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:01:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 18:01:12,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-03-20 18:01:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 18:01:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-03-20 18:01:12,434 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 53 [2022-03-20 18:01:12,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:12,434 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-03-20 18:01:12,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 18:01:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-03-20 18:01:12,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 18:01:12,435 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:12,435 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:12,464 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 18:01:12,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:12,642 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:12,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:12,642 INFO L85 PathProgramCache]: Analyzing trace with hash 526936598, now seen corresponding path program 15 times [2022-03-20 18:01:12,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:12,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1604713396] [2022-03-20 18:01:12,691 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:12,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1650647438, now seen corresponding path program 1 times [2022-03-20 18:01:12,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:12,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882296798] [2022-03-20 18:01:12,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:12,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:12,698 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:12,703 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:12,703 INFO L85 PathProgramCache]: Analyzing trace with hash 526936598, now seen corresponding path program 16 times [2022-03-20 18:01:12,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:12,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272491299] [2022-03-20 18:01:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:12,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:12,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:12,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:12,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:12,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:01:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:12,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:01:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:12,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:01:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:12,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:01:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:13,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:01:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:13,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:01:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 18:01:13,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:13,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272491299] [2022-03-20 18:01:13,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272491299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:13,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521433127] [2022-03-20 18:01:13,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:13,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:13,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:13,016 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 18:01:13,017 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 18:01:13,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:13,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:13,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 18:01:13,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 18:01:13,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 18:01:14,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521433127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:14,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:14,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 27] total 47 [2022-03-20 18:01:14,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:14,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1604713396] [2022-03-20 18:01:14,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1604713396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:14,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:14,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 18:01:14,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141743012] [2022-03-20 18:01:14,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:14,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 18:01:14,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:14,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 18:01:14,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 18:01:14,566 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 18:01:15,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:15,222 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-03-20 18:01:15,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 18:01:15,223 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 59 [2022-03-20 18:01:15,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:15,223 INFO L225 Difference]: With dead ends: 49 [2022-03-20 18:01:15,224 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 18:01:15,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 102 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=607, Invalid=3553, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 18:01:15,225 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:15,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 98 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 18:01:15,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-03-20 18:01:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 18:01:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-20 18:01:15,231 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 59 [2022-03-20 18:01:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:15,232 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-20 18:01:15,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 18:01:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-20 18:01:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 18:01:15,232 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:15,233 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:15,259 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 18:01:15,450 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,SelfDestructingSolverStorable16,SelfDestructingSolverStorable17 [2022-03-20 18:01:15,451 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:15,451 INFO L85 PathProgramCache]: Analyzing trace with hash 741933172, now seen corresponding path program 17 times [2022-03-20 18:01:15,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:15,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [349312743] [2022-03-20 18:01:15,486 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:15,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1709752782, now seen corresponding path program 1 times [2022-03-20 18:01:15,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:15,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270200508] [2022-03-20 18:01:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:15,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:15,491 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:15,495 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:15,495 INFO L85 PathProgramCache]: Analyzing trace with hash 741933172, now seen corresponding path program 18 times [2022-03-20 18:01:15,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:15,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860908023] [2022-03-20 18:01:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:15,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:15,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:15,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:15,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:15,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:01:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:15,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:01:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:15,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:01:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:15,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:01:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:15,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:01:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:15,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:01:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:15,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:01:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 18:01:15,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:15,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860908023] [2022-03-20 18:01:15,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860908023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:15,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145379689] [2022-03-20 18:01:15,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:15,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:15,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:15,898 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 18:01:15,899 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 18:01:15,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 18:01:15,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:15,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 18:01:15,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 18:01:16,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 18:01:17,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145379689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:17,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:17,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 30] total 52 [2022-03-20 18:01:17,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:17,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [349312743] [2022-03-20 18:01:17,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [349312743] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:17,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:17,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 18:01:17,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573559679] [2022-03-20 18:01:17,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:17,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 18:01:17,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:17,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 18:01:17,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2341, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:01:17,916 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 18:01:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:18,670 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-03-20 18:01:18,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 18:01:18,670 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 65 [2022-03-20 18:01:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:18,671 INFO L225 Difference]: With dead ends: 52 [2022-03-20 18:01:18,671 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 18:01:18,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=725, Invalid=4387, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:01:18,673 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:18,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 79 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:18,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 18:01:18,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-03-20 18:01:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 13 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 18:01:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-03-20 18:01:18,680 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 65 [2022-03-20 18:01:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:18,680 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-03-20 18:01:18,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 18:01:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-03-20 18:01:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 18:01:18,681 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:18,681 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:18,702 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 18:01:18,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:18,887 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:18,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:18,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1337272238, now seen corresponding path program 19 times [2022-03-20 18:01:18,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:18,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1235917556] [2022-03-20 18:01:18,914 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1768858126, now seen corresponding path program 1 times [2022-03-20 18:01:18,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575102493] [2022-03-20 18:01:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:18,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:18,941 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:18,950 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:18,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1337272238, now seen corresponding path program 20 times [2022-03-20 18:01:18,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:18,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466967178] [2022-03-20 18:01:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:18,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:19,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:19,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:19,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:19,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:01:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:19,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:01:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:19,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:01:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:19,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:01:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:19,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:01:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:19,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:01:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:19,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:01:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:19,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:01:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-20 18:01:19,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:19,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466967178] [2022-03-20 18:01:19,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466967178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:19,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091862021] [2022-03-20 18:01:19,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:19,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:19,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:19,411 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 18:01:19,463 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 18:01:19,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:19,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:19,496 WARN L261 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-20 18:01:19,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-20 18:01:19,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 18:01:21,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091862021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:21,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:21,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 33] total 57 [2022-03-20 18:01:21,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:21,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1235917556] [2022-03-20 18:01:21,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1235917556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:21,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:21,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 18:01:21,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972381934] [2022-03-20 18:01:21,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:21,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 18:01:21,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 18:01:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=2828, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 18:01:21,942 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 18:01:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:22,852 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-03-20 18:01:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 18:01:22,853 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 71 [2022-03-20 18:01:22,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:22,854 INFO L225 Difference]: With dead ends: 55 [2022-03-20 18:01:22,854 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 18:01:22,855 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 122 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=853, Invalid=5309, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 18:01:22,856 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:22,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 90 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 18:01:22,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-03-20 18:01:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 14 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 18:01:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-03-20 18:01:22,862 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 71 [2022-03-20 18:01:22,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:22,862 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-03-20 18:01:22,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 18:01:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-03-20 18:01:22,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 18:01:22,863 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:22,863 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:22,887 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 18:01:23,079 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,SelfDestructingSolverStorable20,SelfDestructingSolverStorable21 [2022-03-20 18:01:23,079 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:23,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1594282416, now seen corresponding path program 21 times [2022-03-20 18:01:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:23,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1409139893] [2022-03-20 18:01:23,104 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1827963470, now seen corresponding path program 1 times [2022-03-20 18:01:23,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:23,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919678453] [2022-03-20 18:01:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:23,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:23,114 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:23,118 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:23,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1594282416, now seen corresponding path program 22 times [2022-03-20 18:01:23,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:23,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089751219] [2022-03-20 18:01:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:23,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:01:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:01:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:01:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:01:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:01:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:01:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:01:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:01:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:01:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-03-20 18:01:23,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:23,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089751219] [2022-03-20 18:01:23,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089751219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:23,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503291045] [2022-03-20 18:01:23,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:23,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:23,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:23,558 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 18:01:23,559 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 18:01:23,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:23,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:23,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-20 18:01:23,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-03-20 18:01:24,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-20 18:01:26,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503291045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:26,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:26,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 36] total 62 [2022-03-20 18:01:26,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:26,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1409139893] [2022-03-20 18:01:26,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1409139893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:26,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:26,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 18:01:26,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232197543] [2022-03-20 18:01:26,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:26,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 18:01:26,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:26,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 18:01:26,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=3361, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 18:01:26,413 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 18:01:27,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:27,454 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2022-03-20 18:01:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 18:01:27,454 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 77 [2022-03-20 18:01:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:27,455 INFO L225 Difference]: With dead ends: 58 [2022-03-20 18:01:27,455 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 18:01:27,458 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=991, Invalid=6319, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 18:01:27,459 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:27,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 116 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:01:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 18:01:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-03-20 18:01:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 15 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 18:01:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2022-03-20 18:01:27,473 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 77 [2022-03-20 18:01:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:27,473 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2022-03-20 18:01:27,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 18:01:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2022-03-20 18:01:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 18:01:27,474 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:27,474 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:27,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:27,683 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,SelfDestructingSolverStorable22,SelfDestructingSolverStorable23 [2022-03-20 18:01:27,683 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 833473678, now seen corresponding path program 23 times [2022-03-20 18:01:27,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:27,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1319978093] [2022-03-20 18:01:27,708 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:27,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1887068814, now seen corresponding path program 1 times [2022-03-20 18:01:27,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:27,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495840651] [2022-03-20 18:01:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:27,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:27,714 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:27,720 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash 833473678, now seen corresponding path program 24 times [2022-03-20 18:01:27,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:27,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052045105] [2022-03-20 18:01:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:27,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:01:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:01:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:01:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:01:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:01:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:01:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:01:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:01:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:01:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:01:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-20 18:01:28,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:28,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052045105] [2022-03-20 18:01:28,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052045105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:28,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993042520] [2022-03-20 18:01:28,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:28,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:28,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:28,216 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 18:01:28,217 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 18:01:28,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 18:01:28,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:28,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-20 18:01:28,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-20 18:01:28,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-20 18:01:32,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993042520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:32,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:32,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 39] total 67 [2022-03-20 18:01:32,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:32,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1319978093] [2022-03-20 18:01:32,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1319978093] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:32,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:32,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 18:01:32,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219234177] [2022-03-20 18:01:32,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:32,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 18:01:32,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:32,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 18:01:32,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=3940, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 18:01:32,320 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 16 states have internal predecessors, (33), 14 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 18:01:33,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:33,646 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-03-20 18:01:33,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 18:01:33,647 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 16 states have internal predecessors, (33), 14 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 83 [2022-03-20 18:01:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:33,648 INFO L225 Difference]: With dead ends: 61 [2022-03-20 18:01:33,648 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 18:01:33,649 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 142 SyntacticMatches, 12 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1139, Invalid=7417, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 18:01:33,650 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:33,650 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 117 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:01:33,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 18:01:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-03-20 18:01:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 16 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 18:01:33,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-03-20 18:01:33,657 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 83 [2022-03-20 18:01:33,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:33,657 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-03-20 18:01:33,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 16 states have internal predecessors, (33), 14 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 18:01:33,657 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-03-20 18:01:33,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 18:01:33,658 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:33,658 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:33,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:33,867 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,SelfDestructingSolverStorable24,SelfDestructingSolverStorable25 [2022-03-20 18:01:33,868 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:33,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:33,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1520916244, now seen corresponding path program 25 times [2022-03-20 18:01:33,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:33,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1052009615] [2022-03-20 18:01:33,896 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:33,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1946174158, now seen corresponding path program 1 times [2022-03-20 18:01:33,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:33,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570829548] [2022-03-20 18:01:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:33,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:33,901 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:33,904 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1520916244, now seen corresponding path program 26 times [2022-03-20 18:01:33,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:33,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600273879] [2022-03-20 18:01:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:33,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:01:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:01:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:01:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:01:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:01:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:01:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:01:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:01:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:01:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:01:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:01:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-03-20 18:01:34,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:34,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600273879] [2022-03-20 18:01:34,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600273879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:34,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134498804] [2022-03-20 18:01:34,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:34,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:34,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:34,470 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 18:01:34,471 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 18:01:34,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:34,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:34,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 133 conjunts are in the unsatisfiable core [2022-03-20 18:01:34,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-03-20 18:01:35,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-20 18:01:39,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134498804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:39,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:39,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 42] total 72 [2022-03-20 18:01:39,450 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:39,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1052009615] [2022-03-20 18:01:39,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1052009615] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:39,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:39,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 18:01:39,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331869128] [2022-03-20 18:01:39,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:39,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 18:01:39,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:39,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 18:01:39,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=4565, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:01:39,451 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 18:01:40,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:40,921 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2022-03-20 18:01:40,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 18:01:40,922 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 89 [2022-03-20 18:01:40,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:40,923 INFO L225 Difference]: With dead ends: 64 [2022-03-20 18:01:40,923 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 18:01:40,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 152 SyntacticMatches, 13 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1297, Invalid=8603, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 18:01:40,925 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:40,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 108 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:01:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 18:01:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-03-20 18:01:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 17 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 18:01:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2022-03-20 18:01:40,936 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 89 [2022-03-20 18:01:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:40,936 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2022-03-20 18:01:40,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 18:01:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2022-03-20 18:01:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 18:01:40,937 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:40,937 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:40,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 18:01:41,139 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,SelfDestructingSolverStorable26,SelfDestructingSolverStorable27 [2022-03-20 18:01:41,139 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:41,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:41,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2029536970, now seen corresponding path program 27 times [2022-03-20 18:01:41,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:41,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1558553747] [2022-03-20 18:01:41,166 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:41,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2005279502, now seen corresponding path program 1 times [2022-03-20 18:01:41,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:41,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083548269] [2022-03-20 18:01:41,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:41,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:41,178 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:41,181 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:41,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2029536970, now seen corresponding path program 28 times [2022-03-20 18:01:41,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:41,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275865120] [2022-03-20 18:01:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:41,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:01:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:01:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:01:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:01:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:01:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:01:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:01:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:01:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:01:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:01:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:01:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 18:01:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-03-20 18:01:41,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:41,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275865120] [2022-03-20 18:01:41,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275865120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:41,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302114728] [2022-03-20 18:01:41,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:41,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:41,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:41,800 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 18:01:41,801 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 18:01:41,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:41,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:41,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 143 conjunts are in the unsatisfiable core [2022-03-20 18:01:41,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-03-20 18:01:42,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 18:01:47,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302114728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:47,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:47,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 45] total 77 [2022-03-20 18:01:47,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:47,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1558553747] [2022-03-20 18:01:47,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1558553747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:47,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:47,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 18:01:47,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005807812] [2022-03-20 18:01:47,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:47,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 18:01:47,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:47,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 18:01:47,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=5236, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 18:01:47,964 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 18:01:49,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:49,772 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2022-03-20 18:01:49,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 18:01:49,773 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 95 [2022-03-20 18:01:49,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:49,774 INFO L225 Difference]: With dead ends: 67 [2022-03-20 18:01:49,774 INFO L226 Difference]: Without dead ends: 62 [2022-03-20 18:01:49,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 162 SyntacticMatches, 14 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1465, Invalid=9877, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 18:01:49,776 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 40 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:49,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 154 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:01:49,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-20 18:01:49,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-03-20 18:01:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 18 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 18:01:49,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-03-20 18:01:49,787 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 95 [2022-03-20 18:01:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:49,788 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-03-20 18:01:49,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 18:01:49,788 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-03-20 18:01:49,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 18:01:49,788 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:49,788 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:49,808 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 18:01:49,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:49,991 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:49,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:49,992 INFO L85 PathProgramCache]: Analyzing trace with hash -346716632, now seen corresponding path program 29 times [2022-03-20 18:01:49,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:49,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [881384437] [2022-03-20 18:01:50,016 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:01:50,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2064384846, now seen corresponding path program 1 times [2022-03-20 18:01:50,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:50,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570234474] [2022-03-20 18:01:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:50,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:50,021 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:01:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:01:50,025 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:01:50,026 INFO L85 PathProgramCache]: Analyzing trace with hash -346716632, now seen corresponding path program 30 times [2022-03-20 18:01:50,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:50,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057401970] [2022-03-20 18:01:50,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:50,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:01:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:01:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:01:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:01:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:01:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:01:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:01:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:01:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:01:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:01:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:01:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:01:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:01:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 18:01:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 18:01:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-20 18:01:50,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:50,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057401970] [2022-03-20 18:01:50,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057401970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:50,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919054692] [2022-03-20 18:01:50,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:50,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:50,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:50,790 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 18:01:50,791 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 18:01:51,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 18:01:51,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:51,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 154 conjunts are in the unsatisfiable core [2022-03-20 18:01:51,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-20 18:01:52,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-20 18:02:02,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919054692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:02,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:02,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 49] total 83 [2022-03-20 18:02:02,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:02,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [881384437] [2022-03-20 18:02:02,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [881384437] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:02,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:02,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 18:02:02,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651260433] [2022-03-20 18:02:02,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:02,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 18:02:02,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:02,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 18:02:02,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=6097, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 18:02:02,051 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 18:02:04,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:04,504 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2022-03-20 18:02:04,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 18:02:04,505 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 101 [2022-03-20 18:02:04,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:04,506 INFO L225 Difference]: With dead ends: 70 [2022-03-20 18:02:04,506 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 18:02:04,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 171 SyntacticMatches, 15 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1694, Invalid=11416, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 18:02:04,507 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:04,507 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 160 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2043 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:02:04,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 18:02:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-03-20 18:02:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 19 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 18:02:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2022-03-20 18:02:04,515 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 101 [2022-03-20 18:02:04,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:04,516 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2022-03-20 18:02:04,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 18:02:04,516 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2022-03-20 18:02:04,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 18:02:04,516 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:04,517 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:04,524 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 18:02:04,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:04,722 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:04,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2031175430, now seen corresponding path program 31 times [2022-03-20 18:02:04,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:04,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [202010775] [2022-03-20 18:02:04,753 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:02:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2123490190, now seen corresponding path program 1 times [2022-03-20 18:02:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:04,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907846172] [2022-03-20 18:02:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:02:04,757 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:02:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:02:04,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:02:04,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2031175430, now seen corresponding path program 32 times [2022-03-20 18:02:04,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:04,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966569407] [2022-03-20 18:02:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:04,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:02:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:02:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:02:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:02:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:02:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:02:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:02:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:02:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:02:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:02:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:02:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:02:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:02:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 18:02:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 18:02:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-20 18:02:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 18:02:05,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:05,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966569407] [2022-03-20 18:02:05,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966569407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:05,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568849757] [2022-03-20 18:02:05,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:02:05,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:05,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:05,609 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 18:02:05,610 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 18:02:05,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:02:05,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:05,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 163 conjunts are in the unsatisfiable core [2022-03-20 18:02:05,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 18:02:06,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-20 18:02:16,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568849757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:16,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:16,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 51] total 87 [2022-03-20 18:02:16,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:16,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [202010775] [2022-03-20 18:02:16,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [202010775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:16,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:16,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 18:02:16,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674342130] [2022-03-20 18:02:16,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:16,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 18:02:16,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 18:02:16,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=6716, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 18:02:16,270 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 18:02:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:18,681 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2022-03-20 18:02:18,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 18:02:18,683 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 107 [2022-03-20 18:02:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:18,684 INFO L225 Difference]: With dead ends: 73 [2022-03-20 18:02:18,684 INFO L226 Difference]: Without dead ends: 68 [2022-03-20 18:02:18,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 182 SyntacticMatches, 16 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1831, Invalid=12689, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 18:02:18,686 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:18,686 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 141 Invalid, 2263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:02:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-20 18:02:18,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-03-20 18:02:18,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 20 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 18:02:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-03-20 18:02:18,695 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 107 [2022-03-20 18:02:18,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:18,695 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-03-20 18:02:18,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 18:02:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-03-20 18:02:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 18:02:18,696 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:18,696 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:18,716 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 18:02:18,911 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,SelfDestructingSolverStorable32,SelfDestructingSolverStorable33 [2022-03-20 18:02:18,911 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:18,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:18,912 INFO L85 PathProgramCache]: Analyzing trace with hash 446982500, now seen corresponding path program 33 times [2022-03-20 18:02:18,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:18,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [952956420] [2022-03-20 18:02:18,935 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:02:18,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2112371762, now seen corresponding path program 1 times [2022-03-20 18:02:18,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:18,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550822199] [2022-03-20 18:02:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:18,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:02:18,940 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:02:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:02:18,951 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:02:18,951 INFO L85 PathProgramCache]: Analyzing trace with hash 446982500, now seen corresponding path program 34 times [2022-03-20 18:02:18,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:18,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239762290] [2022-03-20 18:02:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:18,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:02:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:02:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:02:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:02:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:02:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:02:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:02:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:02:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:02:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:02:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:02:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:02:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:02:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 18:02:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 18:02:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-20 18:02:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 18:02:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-03-20 18:02:19,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:19,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239762290] [2022-03-20 18:02:19,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239762290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:19,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380445665] [2022-03-20 18:02:19,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:02:19,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:19,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:19,775 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 18:02:19,776 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 18:02:19,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:02:19,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:19,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 173 conjunts are in the unsatisfiable core [2022-03-20 18:02:19,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-03-20 18:02:21,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 18:02:32,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380445665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:32,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:32,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 54] total 92 [2022-03-20 18:02:32,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [952956420] [2022-03-20 18:02:32,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [952956420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:32,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:32,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 18:02:32,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825625090] [2022-03-20 18:02:32,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:32,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 18:02:32,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:32,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 18:02:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=847, Invalid=7525, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 18:02:32,537 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 18:02:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:35,355 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2022-03-20 18:02:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 18:02:35,356 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 113 [2022-03-20 18:02:35,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:35,357 INFO L225 Difference]: With dead ends: 76 [2022-03-20 18:02:35,357 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 18:02:35,358 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 192 SyntacticMatches, 17 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=2029, Invalid=14227, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 18:02:35,359 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2691 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:35,359 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 202 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2691 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:02:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 18:02:35,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-03-20 18:02:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 21 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 18:02:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2022-03-20 18:02:35,368 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 113 [2022-03-20 18:02:35,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:35,368 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2022-03-20 18:02:35,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 18:02:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2022-03-20 18:02:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 18:02:35,369 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:35,369 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:35,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:35,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:35,584 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:35,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:35,584 INFO L85 PathProgramCache]: Analyzing trace with hash 39832898, now seen corresponding path program 35 times [2022-03-20 18:02:35,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:35,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335944124] [2022-03-20 18:02:35,619 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:02:35,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2053266418, now seen corresponding path program 1 times [2022-03-20 18:02:35,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:35,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816005273] [2022-03-20 18:02:35,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:35,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:02:35,623 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:02:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:02:35,626 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:02:35,627 INFO L85 PathProgramCache]: Analyzing trace with hash 39832898, now seen corresponding path program 36 times [2022-03-20 18:02:35,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:35,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690513984] [2022-03-20 18:02:35,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:35,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:02:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:02:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:02:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:02:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:02:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:02:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:02:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:02:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:02:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:02:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:02:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:02:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:02:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 18:02:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 18:02:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-20 18:02:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 18:02:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-20 18:02:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-20 18:02:36,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:36,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690513984] [2022-03-20 18:02:36,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690513984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:36,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477617446] [2022-03-20 18:02:36,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:02:36,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:36,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:36,536 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 18:02:36,538 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 18:02:37,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 18:02:37,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:37,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 189 conjunts are in the unsatisfiable core [2022-03-20 18:02:37,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-20 18:02:38,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-20 18:02:48,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477617446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:48,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:48,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 60] total 100 [2022-03-20 18:02:48,284 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:48,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [335944124] [2022-03-20 18:02:48,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [335944124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:48,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:48,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 18:02:48,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19094404] [2022-03-20 18:02:48,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:48,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 18:02:48,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:48,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 18:02:48,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=8943, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 18:02:48,286 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 18:02:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:51,267 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2022-03-20 18:02:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 18:02:51,269 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 119 [2022-03-20 18:02:51,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:51,270 INFO L225 Difference]: With dead ends: 79 [2022-03-20 18:02:51,270 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 18:02:51,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 199 SyntacticMatches, 18 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=2262, Invalid=16644, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 18:02:51,271 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2733 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:51,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 163 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2733 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:02:51,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 18:02:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-03-20 18:02:51,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 22 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 18:02:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-03-20 18:02:51,281 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 119 [2022-03-20 18:02:51,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:51,281 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-03-20 18:02:51,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 18:02:51,281 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-03-20 18:02:51,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 18:02:51,282 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:51,282 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:51,287 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 18:02:51,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 18:02:51,488 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:51,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:51,488 INFO L85 PathProgramCache]: Analyzing trace with hash -630435168, now seen corresponding path program 37 times [2022-03-20 18:02:51,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:51,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1890835805] [2022-03-20 18:02:51,513 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:02:51,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1994161074, now seen corresponding path program 1 times [2022-03-20 18:02:51,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:51,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324312250] [2022-03-20 18:02:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:51,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:02:51,518 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:02:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:02:51,521 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:02:51,521 INFO L85 PathProgramCache]: Analyzing trace with hash -630435168, now seen corresponding path program 38 times [2022-03-20 18:02:51,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:51,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505318895] [2022-03-20 18:02:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:51,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:02:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:02:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:02:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:02:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:02:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:02:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:02:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:02:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:02:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:02:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:02:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:02:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:02:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 18:02:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 18:02:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-20 18:02:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 18:02:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-20 18:02:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-20 18:02:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-03-20 18:02:52,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:52,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505318895] [2022-03-20 18:02:52,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505318895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:52,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902839725] [2022-03-20 18:02:52,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:02:52,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:52,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:52,468 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 18:02:52,497 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 18:02:52,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:02:52,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:52,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 193 conjunts are in the unsatisfiable core [2022-03-20 18:02:52,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-03-20 18:02:54,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-03-20 18:03:16,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902839725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:16,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:16,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 60] total 102 [2022-03-20 18:03:16,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:16,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1890835805] [2022-03-20 18:03:16,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1890835805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:16,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:16,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 18:03:16,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063697934] [2022-03-20 18:03:16,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:16,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 18:03:16,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:16,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 18:03:16,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1021, Invalid=9281, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 18:03:16,919 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 18:03:20,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:20,626 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2022-03-20 18:03:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 18:03:20,627 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 125 [2022-03-20 18:03:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:20,628 INFO L225 Difference]: With dead ends: 82 [2022-03-20 18:03:20,628 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 18:03:20,629 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 212 SyntacticMatches, 19 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=2455, Invalid=17567, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 18:03:20,629 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 50 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3176 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 3176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:20,630 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 199 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 3176 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 18:03:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 18:03:20,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-20 18:03:20,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 23 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 18:03:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-03-20 18:03:20,639 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 125 [2022-03-20 18:03:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:20,640 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-03-20 18:03:20,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 18:03:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-03-20 18:03:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 18:03:20,640 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:20,641 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:03:20,657 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 18:03:20,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 18:03:20,847 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:20,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:20,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2100635266, now seen corresponding path program 39 times [2022-03-20 18:03:20,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:20,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [310932925] [2022-03-20 18:03:20,875 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:03:20,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1935055730, now seen corresponding path program 1 times [2022-03-20 18:03:20,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:20,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022310550] [2022-03-20 18:03:20,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:20,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:03:20,879 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:03:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:03:20,882 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:03:20,882 INFO L85 PathProgramCache]: Analyzing trace with hash -2100635266, now seen corresponding path program 40 times [2022-03-20 18:03:20,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:20,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295311283] [2022-03-20 18:03:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:20,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:03:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:03:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:03:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:03:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:03:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:03:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:03:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:03:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:03:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:03:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:03:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:03:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:03:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 18:03:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 18:03:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-20 18:03:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 18:03:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-20 18:03:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-20 18:03:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-20 18:03:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-03-20 18:03:21,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:21,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295311283] [2022-03-20 18:03:21,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295311283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:21,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413283673] [2022-03-20 18:03:21,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:03:21,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:21,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:21,928 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 18:03:21,929 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 18:03:22,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:03:22,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:22,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 203 conjunts are in the unsatisfiable core [2022-03-20 18:03:22,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-03-20 18:03:23,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-20 18:03:56,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413283673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:56,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:56,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 63] total 107 [2022-03-20 18:03:56,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:56,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [310932925] [2022-03-20 18:03:56,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [310932925] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:56,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:56,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 18:03:56,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457607794] [2022-03-20 18:03:56,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:56,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 18:03:56,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:56,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 18:03:56,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1114, Invalid=10228, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 18:03:56,366 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 18:04:00,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:04:00,952 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2022-03-20 18:04:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 18:04:00,956 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 131 [2022-03-20 18:04:00,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:04:00,956 INFO L225 Difference]: With dead ends: 85 [2022-03-20 18:04:00,956 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 18:04:00,957 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 222 SyntacticMatches, 20 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=2683, Invalid=19369, Unknown=0, NotChecked=0, Total=22052 [2022-03-20 18:04:00,958 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 52 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 3225 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 3348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:04:00,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 160 Invalid, 3348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3225 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 18:04:00,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 18:04:00,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-03-20 18:04:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 24 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 18:04:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2022-03-20 18:04:00,969 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 131 [2022-03-20 18:04:00,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:00,972 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2022-03-20 18:04:00,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 18:04:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2022-03-20 18:04:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 18:04:00,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:00,973 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:04:00,992 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 18:04:01,187 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,SelfDestructingSolverStorable40,SelfDestructingSolverStorable41 [2022-03-20 18:04:01,187 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:01,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1330921948, now seen corresponding path program 41 times [2022-03-20 18:04:01,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:01,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [697136397] [2022-03-20 18:04:01,212 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:04:01,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1875950386, now seen corresponding path program 1 times [2022-03-20 18:04:01,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:01,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851534199] [2022-03-20 18:04:01,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:01,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:04:01,216 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:04:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:04:01,219 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:04:01,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1330921948, now seen corresponding path program 42 times [2022-03-20 18:04:01,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:01,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27131649] [2022-03-20 18:04:01,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:01,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:04:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:04:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:04:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:04:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:04:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:04:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:04:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:04:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:04:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:04:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:04:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:04:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:04:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 18:04:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 18:04:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-20 18:04:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 18:04:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-20 18:04:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-20 18:04:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-20 18:04:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 18:04:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-03-20 18:04:02,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:02,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27131649] [2022-03-20 18:04:02,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27131649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:02,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071413774] [2022-03-20 18:04:02,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:04:02,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:02,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:02,339 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 18:04:02,340 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 18:04:03,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 18:04:03,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:03,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 219 conjunts are in the unsatisfiable core [2022-03-20 18:04:03,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-03-20 18:04:05,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:04:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-20 18:04:25,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071413774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:04:25,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:04:25,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 69] total 115 [2022-03-20 18:04:25,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:04:25,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [697136397] [2022-03-20 18:04:25,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [697136397] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:04:25,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:04:25,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 18:04:25,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832919141] [2022-03-20 18:04:25,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:04:25,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 18:04:25,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:25,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 18:04:25,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1239, Invalid=11871, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 18:04:25,819 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 18:04:31,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:04:31,035 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-03-20 18:04:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 18:04:31,038 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 137 [2022-03-20 18:04:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:04:31,038 INFO L225 Difference]: With dead ends: 88 [2022-03-20 18:04:31,038 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 18:04:31,040 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 229 SyntacticMatches, 21 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=2949, Invalid=22173, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 18:04:31,041 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 4024 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 4136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 4024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:04:31,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 251 Invalid, 4136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 4024 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 18:04:31,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 18:04:31,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-03-20 18:04:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 25 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 18:04:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2022-03-20 18:04:31,065 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 137 [2022-03-20 18:04:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:31,065 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2022-03-20 18:04:31,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 18:04:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2022-03-20 18:04:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:04:31,066 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:31,066 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:04:31,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 18:04:31,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-20 18:04:31,271 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:31,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash -977704006, now seen corresponding path program 43 times [2022-03-20 18:04:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:31,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [25695357] [2022-03-20 18:04:31,299 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:04:31,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1816845042, now seen corresponding path program 1 times [2022-03-20 18:04:31,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:31,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166572377] [2022-03-20 18:04:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:31,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:04:31,303 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:04:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:04:31,306 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:04:31,306 INFO L85 PathProgramCache]: Analyzing trace with hash -977704006, now seen corresponding path program 44 times [2022-03-20 18:04:31,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:31,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58018615] [2022-03-20 18:04:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:31,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:04:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:04:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:04:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:04:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:04:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:04:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:04:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:04:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:04:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:04:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:04:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:04:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:04:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 18:04:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 18:04:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-20 18:04:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 18:04:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-20 18:04:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-20 18:04:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-20 18:04:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 18:04:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-20 18:04:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-03-20 18:04:32,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58018615] [2022-03-20 18:04:32,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58018615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044578358] [2022-03-20 18:04:32,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:04:32,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:32,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:32,772 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 18:04:32,773 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 18:04:32,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:04:32,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:32,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 223 conjunts are in the unsatisfiable core [2022-03-20 18:04:32,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-03-20 18:04:35,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:05:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-03-20 18:05:31,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044578358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:05:31,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:05:31,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 69] total 117 [2022-03-20 18:05:31,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:05:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [25695357] [2022-03-20 18:05:31,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [25695357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:05:31,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:05:31,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 18:05:31,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630539219] [2022-03-20 18:05:31,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:05:31,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 18:05:31,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:31,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 18:05:31,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1312, Invalid=12260, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 18:05:31,009 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 18:05:36,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:05:36,281 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2022-03-20 18:05:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 18:05:36,284 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 143 [2022-03-20 18:05:36,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:05:36,284 INFO L225 Difference]: With dead ends: 91 [2022-03-20 18:05:36,284 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 18:05:36,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 242 SyntacticMatches, 22 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 59.6s TimeCoverageRelationStatistics Valid=3169, Invalid=23237, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 18:05:36,286 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 56 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 4391 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 4508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 4391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:05:36,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 262 Invalid, 4508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 4391 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 18:05:36,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 18:05:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-03-20 18:05:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 26 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 18:05:36,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2022-03-20 18:05:36,298 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 143 [2022-03-20 18:05:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:05:36,298 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2022-03-20 18:05:36,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 18:05:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2022-03-20 18:05:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 18:05:36,299 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:05:36,299 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:05:36,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 18:05:36,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,SelfDestructingSolverStorable45,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:05:36,517 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:05:36,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:05:36,517 INFO L85 PathProgramCache]: Analyzing trace with hash -612157672, now seen corresponding path program 45 times [2022-03-20 18:05:36,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:36,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1332630089] [2022-03-20 18:05:36,542 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:05:36,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1757739698, now seen corresponding path program 1 times [2022-03-20 18:05:36,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:05:36,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921960430] [2022-03-20 18:05:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:05:36,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:05:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:05:36,546 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:05:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:05:36,553 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:05:36,553 INFO L85 PathProgramCache]: Analyzing trace with hash -612157672, now seen corresponding path program 46 times [2022-03-20 18:05:36,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:05:36,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024270514] [2022-03-20 18:05:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:05:36,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:05:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:05:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:05:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:05:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:05:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:05:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:05:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:05:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:05:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:05:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:05:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:05:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:05:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:05:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:05:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 18:05:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 18:05:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-20 18:05:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 18:05:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-20 18:05:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-20 18:05:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-20 18:05:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 18:05:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-20 18:05:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-20 18:05:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-03-20 18:05:37,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:05:37,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024270514] [2022-03-20 18:05:37,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024270514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:05:37,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256401262] [2022-03-20 18:05:37,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:05:37,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:05:37,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:05:37,821 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 18:05:37,822 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 18:05:37,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:05:37,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:05:37,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 233 conjunts are in the unsatisfiable core [2022-03-20 18:05:37,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:05:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-03-20 18:05:40,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:07:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-20 18:07:03,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256401262] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:07:03,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:07:03,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 72] total 122 [2022-03-20 18:07:03,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:07:03,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1332630089] [2022-03-20 18:07:03,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1332630089] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:07:03,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:07:03,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 18:07:03,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457891455] [2022-03-20 18:07:03,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:07:03,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 18:07:03,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 18:07:03,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1417, Invalid=13345, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 18:07:03,997 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 18:07:11,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:07:11,518 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2022-03-20 18:07:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 18:07:11,522 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 149 [2022-03-20 18:07:11,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:07:11,522 INFO L225 Difference]: With dead ends: 94 [2022-03-20 18:07:11,522 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 18:07:11,524 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 252 SyntacticMatches, 23 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 88.6s TimeCoverageRelationStatistics Valid=3427, Invalid=25303, Unknown=0, NotChecked=0, Total=28730 [2022-03-20 18:07:11,525 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 58 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 4588 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 4716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:07:11,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 243 Invalid, 4716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4588 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 18:07:11,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 18:07:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-03-20 18:07:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 27 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 18:07:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-03-20 18:07:11,537 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 149 [2022-03-20 18:07:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:07:11,538 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-03-20 18:07:11,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 18:07:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-03-20 18:07:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 18:07:11,538 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:07:11,539 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:07:11,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 18:07:11,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,SelfDestructingSolverStorable47,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:11,744 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:07:11,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:07:11,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1273854986, now seen corresponding path program 47 times [2022-03-20 18:07:11,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:11,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [23361459] [2022-03-20 18:07:11,771 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:07:11,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1698634354, now seen corresponding path program 1 times [2022-03-20 18:07:11,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:07:11,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755501012] [2022-03-20 18:07:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:07:11,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:07:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:07:11,775 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:07:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:07:11,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:07:11,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1273854986, now seen corresponding path program 48 times [2022-03-20 18:07:11,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:07:11,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960948838] [2022-03-20 18:07:11,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:07:11,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:07:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:12,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:07:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:12,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:07:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:12,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:07:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:12,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:07:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:12,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:07:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:12,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:07:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:12,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:07:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:12,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:07:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:12,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:07:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:07:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:07:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:07:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:07:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:07:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 18:07:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 18:07:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-20 18:07:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 18:07:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-20 18:07:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-20 18:07:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-20 18:07:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 18:07:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-20 18:07:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-20 18:07:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-20 18:07:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2022-03-20 18:07:13,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:07:13,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960948838] [2022-03-20 18:07:13,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960948838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:07:13,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839138292] [2022-03-20 18:07:13,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:07:13,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:13,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:07:13,163 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 18:07:13,170 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 18:07:15,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 18:07:15,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:07:15,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 246 conjunts are in the unsatisfiable core [2022-03-20 18:07:15,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:07:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2022-03-20 18:07:19,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:08:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-20 18:08:21,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839138292] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:08:21,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:08:21,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 78] total 130 [2022-03-20 18:08:21,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:08:21,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [23361459] [2022-03-20 18:08:21,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [23361459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:08:21,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:08:21,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 18:08:21,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135933829] [2022-03-20 18:08:21,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:08:21,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 18:08:21,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:08:21,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 18:08:21,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1557, Invalid=15213, Unknown=0, NotChecked=0, Total=16770 [2022-03-20 18:08:21,668 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 18:08:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:08:30,137 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2022-03-20 18:08:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 18:08:30,139 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 155 [2022-03-20 18:08:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:08:30,140 INFO L225 Difference]: With dead ends: 97 [2022-03-20 18:08:30,140 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 18:08:30,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 259 SyntacticMatches, 24 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3181 ImplicationChecksByTransitivity, 68.4s TimeCoverageRelationStatistics Valid=3726, Invalid=28494, Unknown=0, NotChecked=0, Total=32220 [2022-03-20 18:08:30,142 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 60 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 4533 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 4680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 4533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:08:30,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 184 Invalid, 4680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 4533 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 18:08:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 18:08:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2022-03-20 18:08:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 28 states have call successors, (28), 4 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 18:08:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2022-03-20 18:08:30,156 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 155 [2022-03-20 18:08:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:08:30,156 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2022-03-20 18:08:30,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 18:08:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2022-03-20 18:08:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 18:08:30,157 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:08:30,157 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:08:30,162 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 18:08:30,362 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,SelfDestructingSolverStorable48,SelfDestructingSolverStorable49 [2022-03-20 18:08:30,363 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:08:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:08:30,363 INFO L85 PathProgramCache]: Analyzing trace with hash -559926700, now seen corresponding path program 49 times [2022-03-20 18:08:30,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:08:30,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [345746629] [2022-03-20 18:08:30,389 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:08:30,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1639529010, now seen corresponding path program 1 times [2022-03-20 18:08:30,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:08:30,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215470128] [2022-03-20 18:08:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:08:30,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:08:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:08:30,394 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:08:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:08:30,398 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:08:30,398 INFO L85 PathProgramCache]: Analyzing trace with hash -559926700, now seen corresponding path program 50 times [2022-03-20 18:08:30,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:08:30,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590688863] [2022-03-20 18:08:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:08:30,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:08:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:08:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:08:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:08:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:08:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:08:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:08:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:08:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:08:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:08:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:08:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:08:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:08:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:08:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:08:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 18:08:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 18:08:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-20 18:08:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 18:08:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-20 18:08:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-20 18:08:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-20 18:08:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 18:08:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-20 18:08:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-20 18:08:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-20 18:08:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-20 18:08:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-03-20 18:08:31,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:08:31,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590688863] [2022-03-20 18:08:31,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590688863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:08:31,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896018571] [2022-03-20 18:08:31,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:08:31,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:08:31,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:08:31,893 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 18:08:31,893 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 18:08:31,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:08:31,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:08:31,997 WARN L261 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 253 conjunts are in the unsatisfiable core [2022-03-20 18:08:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:08:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-03-20 18:08:35,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:11:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-20 18:11:45,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896018571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:11:45,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:11:45,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 78] total 132 [2022-03-20 18:11:45,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:11:45,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [345746629] [2022-03-20 18:11:45,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [345746629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:11:45,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:11:45,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 18:11:45,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051264440] [2022-03-20 18:11:45,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:11:45,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 18:11:45,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:11:45,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 18:11:45,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=15653, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 18:11:45,985 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 18:11:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:11:59,645 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2022-03-20 18:11:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 18:11:59,648 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 161 [2022-03-20 18:11:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:11:59,649 INFO L225 Difference]: With dead ends: 100 [2022-03-20 18:11:59,649 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 18:11:59,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 272 SyntacticMatches, 25 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3432 ImplicationChecksByTransitivity, 199.4s TimeCoverageRelationStatistics Valid=3973, Invalid=29699, Unknown=0, NotChecked=0, Total=33672 [2022-03-20 18:11:59,652 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 5258 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 5400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 5258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:11:59,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 245 Invalid, 5400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 5258 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 18:11:59,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 18:11:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-03-20 18:11:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 29 states have call successors, (29), 4 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 18:11:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2022-03-20 18:11:59,667 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 161 [2022-03-20 18:11:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:11:59,667 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2022-03-20 18:11:59,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 18:11:59,667 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2022-03-20 18:11:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 18:11:59,668 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:11:59,668 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:11:59,687 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 18:11:59,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-20 18:11:59,873 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:11:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:11:59,873 INFO L85 PathProgramCache]: Analyzing trace with hash 339550770, now seen corresponding path program 51 times [2022-03-20 18:11:59,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:11:59,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1983328767] [2022-03-20 18:11:59,898 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:11:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1580423666, now seen corresponding path program 1 times [2022-03-20 18:11:59,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:11:59,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191698816] [2022-03-20 18:11:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:11:59,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:11:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:11:59,902 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 18:11:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 18:11:59,905 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 18:11:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash 339550770, now seen corresponding path program 52 times [2022-03-20 18:11:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:11:59,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263505820] [2022-03-20 18:11:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:11:59,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:11:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:12:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 18:12:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 18:12:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 18:12:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 18:12:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:12:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 18:12:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 18:12:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 18:12:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 18:12:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-20 18:12:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-20 18:12:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 18:12:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 18:12:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 18:12:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 18:12:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-20 18:12:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 18:12:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-20 18:12:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-20 18:12:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-20 18:12:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 18:12:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-20 18:12:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-20 18:12:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-20 18:12:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-20 18:12:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-20 18:12:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2022-03-20 18:12:01,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:12:01,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263505820] [2022-03-20 18:12:01,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263505820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:12:01,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055350688] [2022-03-20 18:12:01,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:12:01,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:12:01,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:12:01,808 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 18:12:01,808 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 18:12:01,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:12:01,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:12:01,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 263 conjunts are in the unsatisfiable core [2022-03-20 18:12:01,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:12:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2022-03-20 18:12:08,212 INFO L328 TraceCheckSpWp]: Computing backward predicates...