/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 16:44:09,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 16:44:09,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 16:44:09,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 16:44:09,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 16:44:09,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 16:44:09,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 16:44:09,493 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 16:44:09,499 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 16:44:09,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 16:44:09,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 16:44:09,500 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 16:44:09,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 16:44:09,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 16:44:09,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 16:44:09,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 16:44:09,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 16:44:09,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 16:44:09,501 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 16:44:09,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 16:44:09,501 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 16:44:09,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 16:44:09,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 16:44:09,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 16:44:09,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 16:44:09,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 16:44:09,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 16:44:09,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 16:44:09,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 16:44:09,502 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 16:44:09,502 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 16:44:09,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 16:44:09,502 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 16:44:09,502 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 16:44:09,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 16:44:09,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 16:44:09,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 16:44:09,721 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 16:44:09,722 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 16:44:09,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c [2022-03-20 16:44:09,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09f0359c1/a44e9785484c45d99d433ada60f11112/FLAG78f27dbbc [2022-03-20 16:44:10,082 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 16:44:10,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c [2022-03-20 16:44:10,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09f0359c1/a44e9785484c45d99d433ada60f11112/FLAG78f27dbbc [2022-03-20 16:44:10,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09f0359c1/a44e9785484c45d99d433ada60f11112 [2022-03-20 16:44:10,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 16:44:10,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 16:44:10,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 16:44:10,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 16:44:10,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 16:44:10,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:44:10" (1/1) ... [2022-03-20 16:44:10,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c498afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:44:10, skipping insertion in model container [2022-03-20 16:44:10,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:44:10" (1/1) ... [2022-03-20 16:44:10,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 16:44:10,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 16:44:10,656 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c[458,471] [2022-03-20 16:44:10,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 16:44:10,678 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 16:44:10,691 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c[458,471] [2022-03-20 16:44:10,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 16:44:10,712 INFO L208 MainTranslator]: Completed translation [2022-03-20 16:44:10,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:44:10 WrapperNode [2022-03-20 16:44:10,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 16:44:10,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 16:44:10,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 16:44:10,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 16:44:10,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:44:10" (1/1) ... [2022-03-20 16:44:10,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:44:10" (1/1) ... [2022-03-20 16:44:10,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:44:10" (1/1) ... [2022-03-20 16:44:10,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:44:10" (1/1) ... [2022-03-20 16:44:10,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:44:10" (1/1) ... [2022-03-20 16:44:10,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:44:10" (1/1) ... [2022-03-20 16:44:10,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:44:10" (1/1) ... [2022-03-20 16:44:10,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 16:44:10,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 16:44:10,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 16:44:10,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 16:44:10,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:44:10" (1/1) ... [2022-03-20 16:44:10,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 16:44:10,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:10,792 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 16:44:10,810 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 16:44:10,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 16:44:10,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 16:44:10,821 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 16:44:10,821 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 16:44:10,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 16:44:10,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 16:44:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 16:44:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 16:44:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 16:44:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 16:44:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-20 16:44:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 16:44:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 16:44:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 16:44:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 16:44:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 16:44:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 16:44:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 16:44:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 16:44:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 16:44:10,877 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 16:44:10,879 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 16:44:10,973 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 16:44:10,977 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 16:44:10,977 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 16:44:10,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:44:10 BoogieIcfgContainer [2022-03-20 16:44:10,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 16:44:10,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 16:44:10,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 16:44:11,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 16:44:11,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:44:10" (1/3) ... [2022-03-20 16:44:11,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e60189d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:44:11, skipping insertion in model container [2022-03-20 16:44:11,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:44:10" (2/3) ... [2022-03-20 16:44:11,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e60189d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:44:11, skipping insertion in model container [2022-03-20 16:44:11,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:44:10" (3/3) ... [2022-03-20 16:44:11,003 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound20.c [2022-03-20 16:44:11,006 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 16:44:11,006 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 16:44:11,045 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 16:44:11,050 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 16:44:11,050 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 16:44:11,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 16:44:11,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 16:44:11,069 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:11,070 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 16:44:11,070 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:11,074 INFO L85 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times [2022-03-20 16:44:11,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:11,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [409297181] [2022-03-20 16:44:11,088 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:44:11,089 INFO L85 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 2 times [2022-03-20 16:44:11,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:11,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565995088] [2022-03-20 16:44:11,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:11,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:44:11,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 16:44:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:44:11,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 16:44:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:44:11,204 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 16:44:11,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:11,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565995088] [2022-03-20 16:44:11,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565995088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:11,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:11,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 16:44:11,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:11,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [409297181] [2022-03-20 16:44:11,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [409297181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:11,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:11,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 16:44:11,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29402145] [2022-03-20 16:44:11,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:11,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 16:44:11,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:11,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 16:44:11,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 16:44:11,233 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 16:44:11,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:11,275 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-03-20 16:44:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 16:44:11,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 16:44:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:11,281 INFO L225 Difference]: With dead ends: 47 [2022-03-20 16:44:11,281 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 16:44:11,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 16:44:11,286 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:11,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 16:44:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 16:44:11,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 16:44:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 16:44:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-20 16:44:11,311 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-03-20 16:44:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:11,311 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-20 16:44:11,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 16:44:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-20 16:44:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 16:44:11,312 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:11,312 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 16:44:11,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 16:44:11,313 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times [2022-03-20 16:44:11,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:11,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [392151460] [2022-03-20 16:44:11,314 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:44:11,314 INFO L85 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 2 times [2022-03-20 16:44:11,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:11,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344825101] [2022-03-20 16:44:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:11,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:11,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:11,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145939210] [2022-03-20 16:44:11,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:44:11,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:11,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:11,334 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 16:44:11,335 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 16:44:11,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 16:44:11,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:11,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 16:44:11,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:11,497 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 16:44:11,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 16:44:11,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:11,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344825101] [2022-03-20 16:44:11,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:11,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145939210] [2022-03-20 16:44:11,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145939210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:11,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:11,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 16:44:11,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:11,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [392151460] [2022-03-20 16:44:11,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [392151460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:11,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:11,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 16:44:11,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785660] [2022-03-20 16:44:11,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:11,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 16:44:11,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:11,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 16:44:11,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 16:44:11,502 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 16:44:11,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:11,554 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-20 16:44:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 16:44:11,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 16:44:11,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:11,567 INFO L225 Difference]: With dead ends: 34 [2022-03-20 16:44:11,568 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 16:44:11,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 16:44:11,569 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:11,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 16:44:11,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 16:44:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 16:44:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 16:44:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-20 16:44:11,578 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-03-20 16:44:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:11,578 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-20 16:44:11,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 16:44:11,579 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-20 16:44:11,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 16:44:11,579 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:11,579 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:11,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 16:44:11,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:11,788 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:11,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 1 times [2022-03-20 16:44:11,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:11,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1822469820] [2022-03-20 16:44:11,803 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:11,803 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:11,803 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:11,803 INFO L85 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 2 times [2022-03-20 16:44:11,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:11,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516928228] [2022-03-20 16:44:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:11,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:11,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:11,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847638310] [2022-03-20 16:44:11,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:44:11,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:11,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:11,815 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 16:44:11,835 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 16:44:11,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:44:11,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:11,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 16:44:11,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 16:44:11,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 16:44:12,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:12,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516928228] [2022-03-20 16:44:12,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:12,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847638310] [2022-03-20 16:44:12,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847638310] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:12,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:12,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 16:44:12,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:12,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1822469820] [2022-03-20 16:44:12,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1822469820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:12,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:12,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 16:44:12,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281428078] [2022-03-20 16:44:12,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:12,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 16:44:12,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 16:44:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 16:44:12,427 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 16:44:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:12,461 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-03-20 16:44:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 16:44:12,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-20 16:44:12,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:12,462 INFO L225 Difference]: With dead ends: 36 [2022-03-20 16:44:12,462 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 16:44:12,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 16:44:12,463 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:12,464 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 16:44:12,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 16:44:12,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 16:44:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 16:44:12,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-20 16:44:12,469 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-03-20 16:44:12,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:12,469 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-20 16:44:12,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 16:44:12,470 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-20 16:44:12,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 16:44:12,470 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:12,470 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:12,489 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 16:44:12,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 16:44:12,671 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:12,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 1 times [2022-03-20 16:44:12,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:12,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [472527116] [2022-03-20 16:44:12,675 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:12,675 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:12,675 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 2 times [2022-03-20 16:44:12,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:12,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469157394] [2022-03-20 16:44:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:12,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:12,687 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:12,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25642592] [2022-03-20 16:44:12,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:44:12,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:12,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:12,708 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 16:44:12,720 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 16:44:12,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:44:12,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:12,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 16:44:12,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 16:44:12,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:13,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:13,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469157394] [2022-03-20 16:44:13,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:13,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25642592] [2022-03-20 16:44:13,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25642592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:13,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:13,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 16:44:13,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:13,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [472527116] [2022-03-20 16:44:13,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [472527116] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:13,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:13,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 16:44:13,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607486719] [2022-03-20 16:44:13,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:13,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 16:44:13,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:13,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 16:44:13,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 16:44:13,066 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 16:44:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:13,118 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-03-20 16:44:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 16:44:13,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-03-20 16:44:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:13,120 INFO L225 Difference]: With dead ends: 39 [2022-03-20 16:44:13,120 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 16:44:13,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 16:44:13,121 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:13,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 16:44:13,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 16:44:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 16:44:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 16:44:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-03-20 16:44:13,137 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-03-20 16:44:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:13,137 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-03-20 16:44:13,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 16:44:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-03-20 16:44:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 16:44:13,139 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:13,140 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:13,158 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 16:44:13,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:13,358 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:13,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:13,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2045316535, now seen corresponding path program 3 times [2022-03-20 16:44:13,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:13,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1269898537] [2022-03-20 16:44:13,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:13,364 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:13,364 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:13,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2045316535, now seen corresponding path program 4 times [2022-03-20 16:44:13,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:13,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781684646] [2022-03-20 16:44:13,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:13,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:13,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:13,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956529982] [2022-03-20 16:44:13,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:44:13,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:13,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:13,373 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 16:44:13,374 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 16:44:13,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:44:13,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:13,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 16:44:13,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 16:44:13,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:13,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781684646] [2022-03-20 16:44:13,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956529982] [2022-03-20 16:44:13,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956529982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:13,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:13,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 16:44:13,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:13,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1269898537] [2022-03-20 16:44:13,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1269898537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:13,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:13,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 16:44:13,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754412641] [2022-03-20 16:44:13,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:13,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 16:44:13,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:13,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 16:44:13,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 16:44:13,718 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 16:44:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:13,774 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-03-20 16:44:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 16:44:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-03-20 16:44:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:13,776 INFO L225 Difference]: With dead ends: 42 [2022-03-20 16:44:13,776 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 16:44:13,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 16:44:13,777 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:13,777 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 165 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 16:44:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 16:44:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 16:44:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 16:44:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-20 16:44:13,783 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2022-03-20 16:44:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:13,783 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-20 16:44:13,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 16:44:13,783 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-20 16:44:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 16:44:13,784 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:13,784 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:13,802 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 16:44:13,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:13,999 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:14,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:14,000 INFO L85 PathProgramCache]: Analyzing trace with hash -285848920, now seen corresponding path program 5 times [2022-03-20 16:44:14,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:14,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [308023531] [2022-03-20 16:44:14,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:14,002 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:14,002 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash -285848920, now seen corresponding path program 6 times [2022-03-20 16:44:14,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:14,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725055269] [2022-03-20 16:44:14,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:14,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:14,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:14,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387249793] [2022-03-20 16:44:14,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:44:14,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:14,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:14,013 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 16:44:14,014 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 16:44:14,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 16:44:14,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:14,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 16:44:14,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 16:44:14,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:14,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:14,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725055269] [2022-03-20 16:44:14,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:14,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387249793] [2022-03-20 16:44:14,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387249793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:14,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:14,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 16:44:14,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:14,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [308023531] [2022-03-20 16:44:14,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [308023531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:14,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:14,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 16:44:14,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809947873] [2022-03-20 16:44:14,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:14,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 16:44:14,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:14,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 16:44:14,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 16:44:14,309 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 16:44:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:14,375 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-03-20 16:44:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 16:44:14,376 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2022-03-20 16:44:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:14,376 INFO L225 Difference]: With dead ends: 45 [2022-03-20 16:44:14,376 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 16:44:14,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 16:44:14,377 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:14,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 205 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 16:44:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 16:44:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-20 16:44:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 16:44:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-03-20 16:44:14,395 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 44 [2022-03-20 16:44:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:14,396 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-03-20 16:44:14,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 16:44:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-03-20 16:44:14,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 16:44:14,396 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:14,396 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:14,418 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 16:44:14,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:14,603 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:14,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:14,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1858889367, now seen corresponding path program 7 times [2022-03-20 16:44:14,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:14,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [109865473] [2022-03-20 16:44:14,606 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:14,606 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:14,606 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1858889367, now seen corresponding path program 8 times [2022-03-20 16:44:14,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:14,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355055962] [2022-03-20 16:44:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:14,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:14,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:14,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298510201] [2022-03-20 16:44:14,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:44:14,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:14,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:14,622 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 16:44:14,623 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 16:44:14,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:44:14,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:14,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 16:44:14,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 16:44:14,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:14,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:14,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355055962] [2022-03-20 16:44:14,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:14,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298510201] [2022-03-20 16:44:14,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298510201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:14,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:14,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 16:44:14,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:14,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [109865473] [2022-03-20 16:44:14,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [109865473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:14,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:14,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 16:44:14,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112376123] [2022-03-20 16:44:14,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:14,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 16:44:14,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 16:44:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 16:44:14,941 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 16:44:15,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:15,021 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-03-20 16:44:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 16:44:15,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2022-03-20 16:44:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:15,023 INFO L225 Difference]: With dead ends: 48 [2022-03-20 16:44:15,023 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 16:44:15,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 16:44:15,024 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:15,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 249 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 16:44:15,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 16:44:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 16:44:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 16:44:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-03-20 16:44:15,034 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 51 [2022-03-20 16:44:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:15,035 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-03-20 16:44:15,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 16:44:15,035 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-03-20 16:44:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 16:44:15,036 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:15,036 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:15,065 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 16:44:15,236 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:15,236 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1288003464, now seen corresponding path program 9 times [2022-03-20 16:44:15,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:15,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408781429] [2022-03-20 16:44:15,239 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:15,239 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:15,239 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:15,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1288003464, now seen corresponding path program 10 times [2022-03-20 16:44:15,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:15,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746650128] [2022-03-20 16:44:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:15,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:15,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:15,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212968798] [2022-03-20 16:44:15,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:44:15,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:15,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:15,247 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 16:44:15,248 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 16:44:15,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:44:15,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:15,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 16:44:15,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 16:44:15,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:15,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:15,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746650128] [2022-03-20 16:44:15,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:15,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212968798] [2022-03-20 16:44:15,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212968798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:15,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:15,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 16:44:15,659 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:15,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408781429] [2022-03-20 16:44:15,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408781429] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:15,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:15,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 16:44:15,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791249456] [2022-03-20 16:44:15,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:15,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 16:44:15,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:15,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 16:44:15,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 16:44:15,660 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 16:44:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:15,757 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-03-20 16:44:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 16:44:15,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2022-03-20 16:44:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:15,758 INFO L225 Difference]: With dead ends: 51 [2022-03-20 16:44:15,758 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 16:44:15,759 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 16:44:15,759 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:15,759 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 297 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 16:44:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 16:44:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 16:44:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 16:44:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-03-20 16:44:15,765 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 58 [2022-03-20 16:44:15,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:15,765 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-03-20 16:44:15,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 16:44:15,765 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-03-20 16:44:15,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 16:44:15,766 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:15,766 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:15,772 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 16:44:15,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:15,970 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:15,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1494042761, now seen corresponding path program 11 times [2022-03-20 16:44:15,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:15,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1304042262] [2022-03-20 16:44:15,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:15,973 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:15,973 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:15,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1494042761, now seen corresponding path program 12 times [2022-03-20 16:44:15,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:15,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411345807] [2022-03-20 16:44:15,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:15,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:15,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:15,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110553820] [2022-03-20 16:44:15,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:44:15,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:15,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:15,980 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 16:44:15,982 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 16:44:16,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 16:44:16,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:16,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 16:44:16,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 16:44:16,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:16,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:16,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411345807] [2022-03-20 16:44:16,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:16,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110553820] [2022-03-20 16:44:16,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110553820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:16,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:16,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 16:44:16,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:16,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1304042262] [2022-03-20 16:44:16,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1304042262] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:16,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:16,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 16:44:16,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512663941] [2022-03-20 16:44:16,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:16,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 16:44:16,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:16,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 16:44:16,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-20 16:44:16,666 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 16:44:16,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:16,786 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-03-20 16:44:16,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 16:44:16,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2022-03-20 16:44:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:16,788 INFO L225 Difference]: With dead ends: 54 [2022-03-20 16:44:16,788 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 16:44:16,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-20 16:44:16,788 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:16,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 349 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 16:44:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 16:44:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-20 16:44:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 16:44:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-03-20 16:44:16,795 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2022-03-20 16:44:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:16,795 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-03-20 16:44:16,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 16:44:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-03-20 16:44:16,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 16:44:16,796 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:16,796 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:16,803 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 16:44:17,001 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,SelfDestructingSolverStorable8 [2022-03-20 16:44:17,001 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:17,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:17,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1734448024, now seen corresponding path program 13 times [2022-03-20 16:44:17,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:17,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1371370313] [2022-03-20 16:44:17,004 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:17,004 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:17,004 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1734448024, now seen corresponding path program 14 times [2022-03-20 16:44:17,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:17,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620284428] [2022-03-20 16:44:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:17,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:17,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:17,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179697686] [2022-03-20 16:44:17,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:44:17,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:17,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:17,018 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 16:44:17,019 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 16:44:17,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:44:17,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:17,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 16:44:17,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 16:44:17,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:17,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:17,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620284428] [2022-03-20 16:44:17,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:17,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179697686] [2022-03-20 16:44:17,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179697686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:17,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:17,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 16:44:17,558 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:17,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1371370313] [2022-03-20 16:44:17,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1371370313] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:17,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:17,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 16:44:17,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914728696] [2022-03-20 16:44:17,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:17,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 16:44:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:17,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 16:44:17,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 16:44:17,559 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 16:44:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:17,700 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-03-20 16:44:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 16:44:17,700 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2022-03-20 16:44:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:17,701 INFO L225 Difference]: With dead ends: 57 [2022-03-20 16:44:17,701 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 16:44:17,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-20 16:44:17,701 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:17,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 405 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 16:44:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 16:44:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-20 16:44:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 16:44:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-03-20 16:44:17,707 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 72 [2022-03-20 16:44:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:17,708 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-03-20 16:44:17,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 16:44:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-03-20 16:44:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 16:44:17,708 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:17,709 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:17,719 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 16:44:17,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 16:44:17,913 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:17,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:17,914 INFO L85 PathProgramCache]: Analyzing trace with hash 708181929, now seen corresponding path program 15 times [2022-03-20 16:44:17,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:17,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [757748282] [2022-03-20 16:44:17,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:17,916 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:17,916 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash 708181929, now seen corresponding path program 16 times [2022-03-20 16:44:17,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:17,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521647117] [2022-03-20 16:44:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:17,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:17,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:17,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427447669] [2022-03-20 16:44:17,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:44:17,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:17,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:17,924 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 16:44:17,925 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 16:44:18,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:44:18,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:18,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 16:44:18,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 16:44:18,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:18,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:18,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521647117] [2022-03-20 16:44:18,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:18,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427447669] [2022-03-20 16:44:18,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427447669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:18,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:18,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 16:44:18,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:18,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [757748282] [2022-03-20 16:44:18,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [757748282] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:18,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:18,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 16:44:18,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714396372] [2022-03-20 16:44:18,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:18,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 16:44:18,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:18,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 16:44:18,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-20 16:44:18,770 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 16:44:18,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:18,945 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-03-20 16:44:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 16:44:18,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 79 [2022-03-20 16:44:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:18,947 INFO L225 Difference]: With dead ends: 60 [2022-03-20 16:44:18,947 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 16:44:18,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-20 16:44:18,947 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:18,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 465 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 16:44:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 16:44:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 16:44:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 16:44:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-03-20 16:44:18,953 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2022-03-20 16:44:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:18,953 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-03-20 16:44:18,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 16:44:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-03-20 16:44:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 16:44:18,954 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:18,954 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:18,973 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 16:44:19,159 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,SelfDestructingSolverStorable10 [2022-03-20 16:44:19,159 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:19,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1649446584, now seen corresponding path program 17 times [2022-03-20 16:44:19,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:19,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [221069798] [2022-03-20 16:44:19,161 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:19,161 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:19,161 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1649446584, now seen corresponding path program 18 times [2022-03-20 16:44:19,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:19,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714518023] [2022-03-20 16:44:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:19,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:19,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:19,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291375845] [2022-03-20 16:44:19,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:44:19,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:19,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:19,174 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 16:44:19,175 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 16:44:19,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 16:44:19,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:19,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 16:44:19,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 16:44:19,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:20,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:20,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714518023] [2022-03-20 16:44:20,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:20,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291375845] [2022-03-20 16:44:20,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291375845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:20,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:20,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 16:44:20,187 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:20,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [221069798] [2022-03-20 16:44:20,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [221069798] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:20,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:20,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 16:44:20,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121869999] [2022-03-20 16:44:20,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:20,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 16:44:20,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:20,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 16:44:20,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-03-20 16:44:20,188 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 16:44:20,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:20,379 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-03-20 16:44:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 16:44:20,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 86 [2022-03-20 16:44:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:20,380 INFO L225 Difference]: With dead ends: 63 [2022-03-20 16:44:20,380 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 16:44:20,381 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-03-20 16:44:20,381 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:20,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 529 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 16:44:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 16:44:20,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-20 16:44:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 16:44:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-03-20 16:44:20,389 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 86 [2022-03-20 16:44:20,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:20,390 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-03-20 16:44:20,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 16:44:20,390 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-03-20 16:44:20,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 16:44:20,391 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:20,391 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:20,400 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 16:44:20,596 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,SelfDestructingSolverStorable11 [2022-03-20 16:44:20,596 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:20,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:20,597 INFO L85 PathProgramCache]: Analyzing trace with hash -373309751, now seen corresponding path program 19 times [2022-03-20 16:44:20,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:20,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [199728372] [2022-03-20 16:44:20,599 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:20,599 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:20,599 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:20,599 INFO L85 PathProgramCache]: Analyzing trace with hash -373309751, now seen corresponding path program 20 times [2022-03-20 16:44:20,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:20,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053708264] [2022-03-20 16:44:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:20,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:20,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:20,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233471760] [2022-03-20 16:44:20,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:44:20,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:20,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:20,606 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 16:44:20,607 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 16:44:21,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:44:21,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:21,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 16:44:21,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 16:44:21,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:21,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053708264] [2022-03-20 16:44:21,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233471760] [2022-03-20 16:44:21,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233471760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:21,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:21,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 16:44:21,740 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [199728372] [2022-03-20 16:44:21,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [199728372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:21,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:21,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 16:44:21,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469837017] [2022-03-20 16:44:21,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:21,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 16:44:21,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 16:44:21,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-20 16:44:21,742 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 16:44:21,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:21,941 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-03-20 16:44:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 16:44:21,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 93 [2022-03-20 16:44:21,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:21,942 INFO L225 Difference]: With dead ends: 66 [2022-03-20 16:44:21,942 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 16:44:21,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 16:44:21,943 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:21,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 597 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 16:44:21,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 16:44:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-20 16:44:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 16:44:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-03-20 16:44:21,949 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 93 [2022-03-20 16:44:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:21,949 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-03-20 16:44:21,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 16:44:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-03-20 16:44:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 16:44:21,950 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:21,950 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:21,975 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 16:44:22,156 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,SelfDestructingSolverStorable12 [2022-03-20 16:44:22,156 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:22,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:22,156 INFO L85 PathProgramCache]: Analyzing trace with hash -22647256, now seen corresponding path program 21 times [2022-03-20 16:44:22,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:22,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [994360964] [2022-03-20 16:44:22,158 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:22,158 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:22,158 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:22,158 INFO L85 PathProgramCache]: Analyzing trace with hash -22647256, now seen corresponding path program 22 times [2022-03-20 16:44:22,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:22,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004645775] [2022-03-20 16:44:22,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:22,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:22,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:22,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148798603] [2022-03-20 16:44:22,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:44:22,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:22,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:22,171 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 16:44:22,172 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 16:44:23,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:44:23,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:23,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 16:44:23,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 16:44:23,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:23,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:23,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004645775] [2022-03-20 16:44:23,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:23,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148798603] [2022-03-20 16:44:23,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148798603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:23,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:23,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 16:44:23,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:23,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [994360964] [2022-03-20 16:44:23,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [994360964] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:23,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:23,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 16:44:23,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328744173] [2022-03-20 16:44:23,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:23,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 16:44:23,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:23,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 16:44:23,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-20 16:44:23,673 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 16:44:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:23,912 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-03-20 16:44:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 16:44:23,925 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2022-03-20 16:44:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:23,926 INFO L225 Difference]: With dead ends: 69 [2022-03-20 16:44:23,926 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 16:44:23,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-20 16:44:23,926 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:23,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 669 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 16:44:23,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 16:44:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-20 16:44:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 17 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 16:44:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-20 16:44:23,949 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 100 [2022-03-20 16:44:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:23,950 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-20 16:44:23,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 16:44:23,951 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-20 16:44:23,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 16:44:23,952 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:23,952 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:23,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 16:44:24,159 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,SelfDestructingSolverStorable13 [2022-03-20 16:44:24,160 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:24,160 INFO L85 PathProgramCache]: Analyzing trace with hash 893158889, now seen corresponding path program 23 times [2022-03-20 16:44:24,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:24,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [346573793] [2022-03-20 16:44:24,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:24,162 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:24,162 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:24,162 INFO L85 PathProgramCache]: Analyzing trace with hash 893158889, now seen corresponding path program 24 times [2022-03-20 16:44:24,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:24,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033694727] [2022-03-20 16:44:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:24,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:24,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:24,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775080378] [2022-03-20 16:44:24,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:44:24,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:24,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:24,171 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 16:44:24,172 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 16:44:24,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 16:44:24,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:24,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 16:44:24,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 26 proven. 234 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 16:44:24,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:25,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:25,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033694727] [2022-03-20 16:44:25,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:25,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775080378] [2022-03-20 16:44:25,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775080378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:25,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:25,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 16:44:25,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:25,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [346573793] [2022-03-20 16:44:25,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [346573793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:25,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:25,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 16:44:25,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603461353] [2022-03-20 16:44:25,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:25,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 16:44:25,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:25,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 16:44:25,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-03-20 16:44:25,286 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 16:44:25,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:25,548 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-03-20 16:44:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 16:44:25,548 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 107 [2022-03-20 16:44:25,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:25,549 INFO L225 Difference]: With dead ends: 72 [2022-03-20 16:44:25,549 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 16:44:25,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-03-20 16:44:25,550 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:25,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 745 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 16:44:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 16:44:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-20 16:44:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 16:44:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-03-20 16:44:25,559 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 107 [2022-03-20 16:44:25,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:25,560 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-03-20 16:44:25,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 16:44:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-03-20 16:44:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 16:44:25,560 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:25,560 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:25,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 16:44:25,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:25,763 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:25,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:25,764 INFO L85 PathProgramCache]: Analyzing trace with hash 363946760, now seen corresponding path program 25 times [2022-03-20 16:44:25,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:25,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1981772148] [2022-03-20 16:44:25,771 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:25,771 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:25,771 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:25,772 INFO L85 PathProgramCache]: Analyzing trace with hash 363946760, now seen corresponding path program 26 times [2022-03-20 16:44:25,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:25,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047942165] [2022-03-20 16:44:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:25,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:25,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:25,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688085192] [2022-03-20 16:44:25,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:44:25,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:25,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:25,779 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 16:44:25,780 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 16:44:26,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:44:26,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:26,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 16:44:26,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 28 proven. 273 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-20 16:44:26,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:27,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:27,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047942165] [2022-03-20 16:44:27,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:27,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688085192] [2022-03-20 16:44:27,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688085192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:27,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:27,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-20 16:44:27,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:27,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1981772148] [2022-03-20 16:44:27,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1981772148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:27,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:27,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 16:44:27,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86339017] [2022-03-20 16:44:27,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:27,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 16:44:27,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:27,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 16:44:27,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-20 16:44:27,170 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 16 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 16:44:27,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:27,448 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-03-20 16:44:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 16:44:27,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 16 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 114 [2022-03-20 16:44:27,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:27,449 INFO L225 Difference]: With dead ends: 75 [2022-03-20 16:44:27,449 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 16:44:27,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-20 16:44:27,450 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:27,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 825 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 16:44:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 16:44:27,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-20 16:44:27,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 16:44:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-03-20 16:44:27,456 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 114 [2022-03-20 16:44:27,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:27,456 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-03-20 16:44:27,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 16 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 16:44:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-03-20 16:44:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 16:44:27,457 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:27,457 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:27,464 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 16:44:27,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 16:44:27,662 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:27,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:27,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2101455607, now seen corresponding path program 27 times [2022-03-20 16:44:27,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:27,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [21879655] [2022-03-20 16:44:27,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:27,664 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:27,664 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:27,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2101455607, now seen corresponding path program 28 times [2022-03-20 16:44:27,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:27,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341230204] [2022-03-20 16:44:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:27,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:27,670 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:27,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141113886] [2022-03-20 16:44:27,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:44:27,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:27,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:27,671 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 16:44:27,672 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 16:44:28,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:44:28,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:28,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 16:44:28,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 16:44:28,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:29,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:29,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341230204] [2022-03-20 16:44:29,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:29,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141113886] [2022-03-20 16:44:29,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141113886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:29,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:29,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 16:44:29,104 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:29,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [21879655] [2022-03-20 16:44:29,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [21879655] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:29,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:29,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 16:44:29,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671447976] [2022-03-20 16:44:29,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:29,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 16:44:29,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:29,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 16:44:29,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-20 16:44:29,106 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 16:44:29,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:29,407 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2022-03-20 16:44:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 16:44:29,407 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 121 [2022-03-20 16:44:29,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:29,408 INFO L225 Difference]: With dead ends: 78 [2022-03-20 16:44:29,408 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 16:44:29,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-20 16:44:29,409 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:29,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 909 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 16:44:29,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 16:44:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-20 16:44:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 20 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 16:44:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-03-20 16:44:29,416 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 121 [2022-03-20 16:44:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:29,416 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-03-20 16:44:29,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 16:44:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-03-20 16:44:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 16:44:29,417 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:29,417 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:29,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 16:44:29,625 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,SelfDestructingSolverStorable16 [2022-03-20 16:44:29,625 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:29,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:29,625 INFO L85 PathProgramCache]: Analyzing trace with hash -729919512, now seen corresponding path program 29 times [2022-03-20 16:44:29,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:29,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1876002225] [2022-03-20 16:44:29,627 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:29,627 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:29,627 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:29,627 INFO L85 PathProgramCache]: Analyzing trace with hash -729919512, now seen corresponding path program 30 times [2022-03-20 16:44:29,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:29,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453510886] [2022-03-20 16:44:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:29,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:29,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:29,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210657699] [2022-03-20 16:44:29,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:44:29,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:29,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:29,634 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 16:44:29,635 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 16:44:29,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 16:44:29,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:29,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 16:44:29,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 16:44:30,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:30,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:30,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453510886] [2022-03-20 16:44:30,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:30,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210657699] [2022-03-20 16:44:30,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210657699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:30,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:30,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 16:44:30,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:30,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1876002225] [2022-03-20 16:44:30,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1876002225] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:30,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:30,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 16:44:30,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669671284] [2022-03-20 16:44:30,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:30,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 16:44:30,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 16:44:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-03-20 16:44:30,477 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 16:44:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:30,796 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-03-20 16:44:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 16:44:30,796 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 128 [2022-03-20 16:44:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:30,797 INFO L225 Difference]: With dead ends: 81 [2022-03-20 16:44:30,797 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 16:44:30,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-20 16:44:30,797 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:30,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 997 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 16:44:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 16:44:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-20 16:44:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 21 states have call successors, (21), 6 states have call predecessors, (21), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 16:44:30,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2022-03-20 16:44:30,804 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 128 [2022-03-20 16:44:30,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:30,804 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2022-03-20 16:44:30,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 16:44:30,805 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2022-03-20 16:44:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 16:44:30,805 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:30,805 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:30,827 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 16:44:31,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 16:44:31,011 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:31,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1087843369, now seen corresponding path program 31 times [2022-03-20 16:44:31,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:31,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [109128593] [2022-03-20 16:44:31,013 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:31,013 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:31,013 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1087843369, now seen corresponding path program 32 times [2022-03-20 16:44:31,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:31,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044705646] [2022-03-20 16:44:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:31,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:31,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:31,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805219991] [2022-03-20 16:44:31,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:44:31,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:31,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:31,020 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 16:44:31,021 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 16:44:31,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:44:31,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:31,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 16:44:31,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 34 proven. 408 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 16:44:32,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:33,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:33,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044705646] [2022-03-20 16:44:33,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:33,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805219991] [2022-03-20 16:44:33,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805219991] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:33,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:33,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 16:44:33,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:33,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [109128593] [2022-03-20 16:44:33,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [109128593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:33,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:33,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 16:44:33,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309581369] [2022-03-20 16:44:33,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:33,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 16:44:33,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:33,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 16:44:33,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1220, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 16:44:33,255 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 19 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 16:44:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:33,656 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2022-03-20 16:44:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 16:44:33,656 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 19 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 135 [2022-03-20 16:44:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:33,657 INFO L225 Difference]: With dead ends: 84 [2022-03-20 16:44:33,657 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 16:44:33,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=350, Invalid=1372, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 16:44:33,658 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:33,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1089 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 16:44:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 16:44:33,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-20 16:44:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 22 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 16:44:33,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-03-20 16:44:33,666 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 135 [2022-03-20 16:44:33,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:33,666 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-03-20 16:44:33,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 19 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 16:44:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-03-20 16:44:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-20 16:44:33,667 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:33,667 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:33,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 16:44:33,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:33,869 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:33,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:33,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1539623736, now seen corresponding path program 33 times [2022-03-20 16:44:33,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:33,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1880415786] [2022-03-20 16:44:33,872 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:33,872 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:33,872 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:33,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1539623736, now seen corresponding path program 34 times [2022-03-20 16:44:33,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:33,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452502398] [2022-03-20 16:44:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:33,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:33,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:33,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656160962] [2022-03-20 16:44:33,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:44:33,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:33,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:33,879 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 16:44:33,880 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 16:44:34,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:44:34,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:34,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 16:44:34,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-20 16:44:34,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:35,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:35,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452502398] [2022-03-20 16:44:35,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:35,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656160962] [2022-03-20 16:44:35,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656160962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:35,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:35,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 16:44:35,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:35,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1880415786] [2022-03-20 16:44:35,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1880415786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:35,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:35,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 16:44:35,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942102243] [2022-03-20 16:44:35,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:35,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 16:44:35,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:35,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 16:44:35,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-20 16:44:35,040 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 16:44:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:35,441 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2022-03-20 16:44:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 16:44:35,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 142 [2022-03-20 16:44:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:35,442 INFO L225 Difference]: With dead ends: 87 [2022-03-20 16:44:35,442 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 16:44:35,443 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-20 16:44:35,446 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:35,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1185 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 16:44:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 16:44:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-20 16:44:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 16:44:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-03-20 16:44:35,460 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 142 [2022-03-20 16:44:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:35,460 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-03-20 16:44:35,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 16:44:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-03-20 16:44:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 16:44:35,462 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:35,462 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:35,469 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 16:44:35,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:35,668 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:35,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:35,668 INFO L85 PathProgramCache]: Analyzing trace with hash -157742263, now seen corresponding path program 35 times [2022-03-20 16:44:35,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:35,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [193612583] [2022-03-20 16:44:35,669 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:35,669 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:35,669 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:35,670 INFO L85 PathProgramCache]: Analyzing trace with hash -157742263, now seen corresponding path program 36 times [2022-03-20 16:44:35,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:35,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024468749] [2022-03-20 16:44:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:35,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:35,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:35,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143647549] [2022-03-20 16:44:35,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:44:35,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:35,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:35,681 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 16:44:35,684 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 16:44:46,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 16:44:46,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:46,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 16:44:46,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-20 16:44:47,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:47,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:47,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024468749] [2022-03-20 16:44:47,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:47,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143647549] [2022-03-20 16:44:47,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143647549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:47,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:47,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-20 16:44:47,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:47,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [193612583] [2022-03-20 16:44:47,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [193612583] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:47,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:47,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 16:44:47,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551655461] [2022-03-20 16:44:47,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:47,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 16:44:47,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:47,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 16:44:47,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-20 16:44:47,523 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 16:44:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:47,993 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-03-20 16:44:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 16:44:47,994 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 149 [2022-03-20 16:44:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:47,994 INFO L225 Difference]: With dead ends: 90 [2022-03-20 16:44:47,994 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 16:44:47,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-20 16:44:47,995 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:47,995 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1285 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 16:44:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 16:44:48,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-20 16:44:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 24 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 16:44:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-03-20 16:44:48,004 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 149 [2022-03-20 16:44:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:48,004 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-03-20 16:44:48,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 16:44:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-03-20 16:44:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-20 16:44:48,005 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:48,005 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:48,014 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 16:44:48,215 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,SelfDestructingSolverStorable20 [2022-03-20 16:44:48,215 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:48,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1167462824, now seen corresponding path program 37 times [2022-03-20 16:44:48,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:48,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [416126960] [2022-03-20 16:44:48,218 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:48,218 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:48,218 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:48,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1167462824, now seen corresponding path program 38 times [2022-03-20 16:44:48,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:48,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426771537] [2022-03-20 16:44:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:48,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:48,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:48,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89334472] [2022-03-20 16:44:48,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:44:48,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:48,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:48,225 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 16:44:48,226 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 16:44:48,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:44:48,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:48,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 16:44:48,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-20 16:44:49,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:50,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:50,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426771537] [2022-03-20 16:44:50,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:50,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89334472] [2022-03-20 16:44:50,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89334472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:50,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:50,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-03-20 16:44:50,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:50,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [416126960] [2022-03-20 16:44:50,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [416126960] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:50,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:50,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 16:44:50,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362460786] [2022-03-20 16:44:50,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:50,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 16:44:50,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:50,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 16:44:50,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1613, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 16:44:50,816 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 16:44:51,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:51,403 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-03-20 16:44:51,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 16:44:51,403 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 156 [2022-03-20 16:44:51,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:51,404 INFO L225 Difference]: With dead ends: 93 [2022-03-20 16:44:51,404 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 16:44:51,404 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=467, Invalid=1789, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 16:44:51,405 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:51,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1389 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 16:44:51,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 16:44:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 16:44:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 25 states have call successors, (25), 6 states have call predecessors, (25), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 16:44:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-03-20 16:44:51,413 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 156 [2022-03-20 16:44:51,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:51,413 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-03-20 16:44:51,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 16:44:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-03-20 16:44:51,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 16:44:51,414 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:51,414 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:51,420 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 16:44:51,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 16:44:51,620 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:51,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1670771305, now seen corresponding path program 39 times [2022-03-20 16:44:51,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:51,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [128906830] [2022-03-20 16:44:51,622 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:51,622 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:51,622 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:51,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1670771305, now seen corresponding path program 40 times [2022-03-20 16:44:51,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:51,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951805147] [2022-03-20 16:44:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:51,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:51,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:51,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604660443] [2022-03-20 16:44:51,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:44:51,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:51,630 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 16:44:51,630 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 16:44:52,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:44:52,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:52,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 16:44:52,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-20 16:44:52,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:52,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:52,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951805147] [2022-03-20 16:44:52,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:52,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604660443] [2022-03-20 16:44:52,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604660443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:44:52,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:44:52,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-20 16:44:52,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:52,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [128906830] [2022-03-20 16:44:52,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [128906830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:52,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:52,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 16:44:52,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449814039] [2022-03-20 16:44:52,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:52,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 16:44:52,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 16:44:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-20 16:44:52,850 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 16:44:53,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:53,401 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2022-03-20 16:44:53,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 16:44:53,401 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 163 [2022-03-20 16:44:53,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:53,402 INFO L225 Difference]: With dead ends: 96 [2022-03-20 16:44:53,402 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 16:44:53,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-03-20 16:44:53,402 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:53,402 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1497 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 16:44:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 16:44:53,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-20 16:44:53,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 26 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 16:44:53,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-03-20 16:44:53,412 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 163 [2022-03-20 16:44:53,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:53,412 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-03-20 16:44:53,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 16:44:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-03-20 16:44:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-20 16:44:53,413 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:44:53,413 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:44:53,435 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 16:44:53,618 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:53,618 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:44:53,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:44:53,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1329797496, now seen corresponding path program 41 times [2022-03-20 16:44:53,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:53,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [711008013] [2022-03-20 16:44:53,621 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:44:53,621 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:44:53,621 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:44:53,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1329797496, now seen corresponding path program 42 times [2022-03-20 16:44:53,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:44:53,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451795296] [2022-03-20 16:44:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:44:53,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:44:53,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:44:53,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804476166] [2022-03-20 16:44:53,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:44:53,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:53,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:44:53,631 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 16:44:53,632 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 16:44:54,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 16:44:54,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:44:54,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 16:44:54,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:44:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 819 proven. 0 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-20 16:44:55,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 16:44:55,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:44:55,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451795296] [2022-03-20 16:44:55,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:44:55,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804476166] [2022-03-20 16:44:55,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804476166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:55,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:55,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 16:44:55,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:44:55,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [711008013] [2022-03-20 16:44:55,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [711008013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:44:55,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:44:55,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 16:44:55,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147655595] [2022-03-20 16:44:55,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:44:55,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 16:44:55,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:44:55,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 16:44:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2022-03-20 16:44:55,083 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 23 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 16:44:55,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:44:55,250 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2022-03-20 16:44:55,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 16:44:55,250 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 23 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) Word has length 170 [2022-03-20 16:44:55,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:44:55,251 INFO L225 Difference]: With dead ends: 95 [2022-03-20 16:44:55,251 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 16:44:55,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2022-03-20 16:44:55,252 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 16:44:55,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 423 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 16:44:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 16:44:55,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 16:44:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 16:44:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 16:44:55,252 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2022-03-20 16:44:55,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:44:55,252 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 16:44:55,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 23 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 16:44:55,252 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 16:44:55,252 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 16:44:55,254 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 16:44:55,269 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 16:44:55,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:44:55,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 16:44:56,936 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-03-20 16:44:56,936 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-03-20 16:44:56,936 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-03-20 16:44:56,936 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2022-03-20 16:44:56,936 INFO L878 garLoopResultBuilder]: At program point L7(line 7) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-20 16:44:56,936 INFO L878 garLoopResultBuilder]: At program point L7-2(lines 6 8) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 16:44:56,936 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 6 8) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 16:44:56,936 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 17 40) the Hoare annotation is: true [2022-03-20 16:44:56,937 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 20)) (.cse1 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and .cse0 (= main_~c~0 16) (= main_~y~0 16) .cse1 (< 15 main_~k~0)) (and (= 7 main_~y~0) (= 7 main_~c~0) .cse0 .cse1 (< 6 main_~k~0)) (and (= main_~y~0 9) .cse0 (= main_~c~0 9) (< 8 main_~k~0) .cse1) (and .cse0 (= main_~y~0 1) (< 0 main_~k~0) .cse1 (= main_~c~0 1)) (and (< 7 main_~k~0) (= main_~y~0 8) .cse0 (= main_~c~0 8) .cse1) (and (= main_~c~0 17) .cse0 .cse1 (< 16 main_~k~0) (= main_~y~0 17)) (and (= main_~y~0 12) .cse0 (= main_~c~0 12) (< 11 main_~k~0) .cse1) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and (< 17 main_~k~0) .cse0 (= main_~c~0 18) .cse1 (= main_~y~0 18)) (and .cse0 (= 5 main_~c~0) (= 5 main_~y~0) .cse1 (< 4 main_~k~0)) (and .cse0 (= main_~y~0 10) (< 9 main_~k~0) (= main_~c~0 10) .cse1) (and .cse0 (< 18 main_~k~0) (= 19 main_~y~0) .cse1 (= 19 main_~c~0)) (and (= main_~c~0 15) .cse0 (= main_~y~0 15) (< 14 main_~k~0) .cse1) (and .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0) .cse1) (and (<= main_~c~0 20) .cse0 (< 19 main_~k~0) (= main_~y~0 20) (<= 20 main_~c~0) .cse1) (and (= main_~y~0 2) (< 1 main_~k~0) .cse0 (= main_~c~0 2) .cse1) (and (< 12 main_~k~0) .cse0 (= main_~c~0 13) (= main_~y~0 13) .cse1) (and (< 10 main_~k~0) .cse0 (= main_~c~0 11) (= main_~y~0 11) .cse1) (and (= main_~y~0 6) .cse0 (= main_~c~0 6) (< 5 main_~k~0) .cse1) (and .cse0 (= main_~y~0 3) .cse1 (< main_~c~0 (+ main_~k~0 1)) (= main_~c~0 3)) (and (= main_~y~0 14) .cse0 (< 13 main_~k~0) (= main_~c~0 14) .cse1))) [2022-03-20 16:44:56,937 INFO L878 garLoopResultBuilder]: At program point L28-1(lines 27 36) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 20)) (.cse1 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and .cse0 (= main_~c~0 16) (= main_~y~0 16) .cse1 (< 15 main_~k~0)) (and (= 7 main_~y~0) (= 7 main_~c~0) .cse0 .cse1 (< 6 main_~k~0)) (and (= main_~y~0 9) .cse0 (= main_~c~0 9) (< 8 main_~k~0) .cse1) (and .cse0 (= main_~y~0 1) (< 0 main_~k~0) .cse1 (= main_~c~0 1)) (and (< 7 main_~k~0) (= main_~y~0 8) .cse0 (= main_~c~0 8) .cse1) (and (= main_~c~0 17) .cse0 .cse1 (< 16 main_~k~0) (= main_~y~0 17)) (and (= main_~y~0 12) .cse0 (= main_~c~0 12) (< 11 main_~k~0) .cse1) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and (< 17 main_~k~0) .cse0 (= main_~c~0 18) .cse1 (= main_~y~0 18)) (and .cse0 (= 5 main_~c~0) (= 5 main_~y~0) .cse1 (< 4 main_~k~0)) (and .cse0 (= main_~y~0 10) (< 9 main_~k~0) (= main_~c~0 10) .cse1) (and .cse0 (< 18 main_~k~0) (= 19 main_~y~0) .cse1 (= 19 main_~c~0)) (and (= main_~c~0 15) .cse0 (= main_~y~0 15) (< 14 main_~k~0) .cse1) (and .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0) .cse1) (and (<= main_~c~0 20) .cse0 (< 19 main_~k~0) (= main_~y~0 20) (<= 20 main_~c~0) .cse1) (and (= main_~y~0 2) (< 1 main_~k~0) .cse0 (= main_~c~0 2) .cse1) (and (< 12 main_~k~0) .cse0 (= main_~c~0 13) (= main_~y~0 13) .cse1) (and (< 10 main_~k~0) .cse0 (= main_~c~0 11) (= main_~y~0 11) .cse1) (and (= main_~y~0 6) .cse0 (= main_~c~0 6) (< 5 main_~k~0) .cse1) (and .cse0 (= main_~y~0 3) .cse1 (< main_~c~0 (+ main_~k~0 1)) (= main_~c~0 3)) (and (= main_~y~0 14) .cse0 (< 13 main_~k~0) (= main_~c~0 14) .cse1))) [2022-03-20 16:44:56,937 INFO L878 garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 20)) (.cse1 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and .cse0 (= main_~c~0 16) (= main_~y~0 16) .cse1 (< 15 main_~k~0)) (and (= 7 main_~y~0) (= 7 main_~c~0) .cse0 .cse1 (< 6 main_~k~0)) (and (= main_~y~0 9) .cse0 (= main_~c~0 9) (< 8 main_~k~0) .cse1) (and .cse0 (= main_~y~0 1) (< 0 main_~k~0) .cse1 (= main_~c~0 1)) (and (< 7 main_~k~0) (= main_~y~0 8) .cse0 (= main_~c~0 8) .cse1) (and (= main_~c~0 17) .cse0 .cse1 (< 16 main_~k~0) (= main_~y~0 17)) (and (= main_~y~0 12) .cse0 (= main_~c~0 12) (< 11 main_~k~0) .cse1) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and (< 17 main_~k~0) .cse0 (= main_~c~0 18) .cse1 (= main_~y~0 18)) (and .cse0 (= 5 main_~c~0) (= 5 main_~y~0) .cse1 (< 4 main_~k~0)) (and .cse0 (= main_~y~0 10) (< 9 main_~k~0) (= main_~c~0 10) .cse1) (and .cse0 (< 18 main_~k~0) (= 19 main_~y~0) .cse1 (= 19 main_~c~0)) (and (= main_~c~0 15) .cse0 (= main_~y~0 15) (< 14 main_~k~0) .cse1) (and .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0) .cse1) (and (<= main_~c~0 20) .cse0 (< 19 main_~k~0) (= main_~y~0 20) (<= 20 main_~c~0) .cse1) (and (= main_~y~0 2) (< 1 main_~k~0) .cse0 (= main_~c~0 2) .cse1) (and (< 12 main_~k~0) .cse0 (= main_~c~0 13) (= main_~y~0 13) .cse1) (and (< 10 main_~k~0) .cse0 (= main_~c~0 11) (= main_~y~0 11) .cse1) (and (= main_~y~0 6) .cse0 (= main_~c~0 6) (< 5 main_~k~0) .cse1) (and .cse0 (= main_~y~0 3) .cse1 (< main_~c~0 (+ main_~k~0 1)) (= main_~c~0 3)) (and (= main_~y~0 14) .cse0 (< 13 main_~k~0) (= main_~c~0 14) .cse1))) [2022-03-20 16:44:56,937 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 17 40) the Hoare annotation is: true [2022-03-20 16:44:56,937 INFO L878 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse1 (+ (- 1) main_~y~0)) (.cse2 (+ main_~y~0 (- 3))) (.cse0 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and (< 13 main_~k~0) .cse0 (<= main_~k~0 14) (<= main_~c~0 14) (= .cse1 13)) (and (<= main_~c~0 11) (< 10 main_~k~0) (<= main_~k~0 11) (= .cse1 10) .cse0) (and (= main_~x~0 0) (= main_~y~0 0)) (and (<= main_~c~0 3) (<= main_~k~0 3) (= .cse2 0) (< 2 main_~k~0) .cse0) (and (= main_~y~0 9) (<= main_~k~0 9) (< 8 main_~k~0) (<= main_~c~0 9) .cse0) (and (<= main_~c~0 20) (<= main_~k~0 20) (< 19 main_~k~0) (= main_~y~0 20) .cse0) (and (< 12 main_~k~0) (<= main_~c~0 13) (<= main_~k~0 13) (= (+ (- 2) main_~y~0) 11) .cse0) (and (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2) (<= main_~c~0 2) .cse0) (and (= .cse1 0) (<= main_~k~0 1) (< 0 main_~k~0) .cse0 (<= main_~c~0 1)) (and (= main_~y~0 6) (<= main_~k~0 6) (< 5 main_~k~0) .cse0 (<= main_~c~0 6)) (and (<= main_~c~0 5) (<= main_~k~0 5) (= 5 main_~y~0) .cse0 (< 4 main_~k~0)) (and (= main_~y~0 4) (< 3 main_~k~0) (<= main_~k~0 4) .cse0 (<= main_~c~0 4)) (and (< 14 main_~k~0) (<= main_~c~0 15) (<= main_~k~0 15) .cse0 (= 14 .cse1)) (and (< 17 main_~k~0) (<= main_~c~0 18) (<= main_~k~0 18) .cse0 (= .cse1 17)) (and (= main_~y~0 12) (<= main_~c~0 12) (< 11 main_~k~0) .cse0 (<= main_~k~0 12)) (and (<= main_~k~0 10) (<= main_~c~0 10) (= 7 .cse2) (< 9 main_~k~0) .cse0) (and (<= main_~k~0 7) (<= main_~c~0 7) (= (+ main_~y~0 (- 4)) 3) .cse0 (< 6 main_~k~0)) (and (<= main_~k~0 16) (= main_~y~0 16) .cse0 (< 15 main_~k~0) (<= main_~c~0 16)) (and (< 18 main_~k~0) (<= main_~c~0 19) (<= main_~k~0 19) (= 19 main_~y~0) .cse0) (and (<= main_~c~0 17) (<= main_~k~0 17) .cse0 (< 16 main_~k~0) (= main_~y~0 17)) (and (< 7 main_~k~0) (= main_~y~0 8) (<= main_~c~0 8) (<= main_~k~0 8) .cse0))) [2022-03-20 16:44:56,937 INFO L885 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true [2022-03-20 16:44:56,937 INFO L878 garLoopResultBuilder]: At program point L21-1(line 21) the Hoare annotation is: (and (<= main_~k~0 20) (<= 0 main_~k~0)) [2022-03-20 16:44:56,937 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 17 40) the Hoare annotation is: true [2022-03-20 16:44:56,937 INFO L885 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: true [2022-03-20 16:44:56,937 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)) [2022-03-20 16:44:56,937 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 16:44:56,937 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 16:44:56,937 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 16:44:56,938 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 16:44:56,938 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 16:44:56,938 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 16:44:56,938 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 16:44:56,938 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-03-20 16:44:56,938 INFO L878 garLoopResultBuilder]: At program point L11(lines 11 12) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 16:44:56,938 INFO L878 garLoopResultBuilder]: At program point L10(lines 10 13) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) [2022-03-20 16:44:56,938 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 9 15) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) [2022-03-20 16:44:56,938 INFO L878 garLoopResultBuilder]: At program point L10-2(lines 9 15) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) [2022-03-20 16:44:56,938 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 16:44:56,940 INFO L719 BasicCegarLoop]: Path program histogram: [42, 2, 2, 2] [2022-03-20 16:44:56,941 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 16:44:56,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:44:56 BoogieIcfgContainer [2022-03-20 16:44:56,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 16:44:56,965 INFO L158 Benchmark]: Toolchain (without parser) took 46452.75ms. Allocated memory was 192.9MB in the beginning and 259.0MB in the end (delta: 66.1MB). Free memory was 143.5MB in the beginning and 223.5MB in the end (delta: -79.9MB). Peak memory consumption was 127.9MB. Max. memory is 8.0GB. [2022-03-20 16:44:56,965 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 192.9MB. Free memory was 159.5MB in the beginning and 159.5MB in the end (delta: 73.1kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 16:44:56,965 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.74ms. Allocated memory is still 192.9MB. Free memory was 143.3MB in the beginning and 168.9MB in the end (delta: -25.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 16:44:56,965 INFO L158 Benchmark]: Boogie Preprocessor took 37.62ms. Allocated memory is still 192.9MB. Free memory was 168.9MB in the beginning and 167.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 16:44:56,965 INFO L158 Benchmark]: RCFGBuilder took 225.95ms. Allocated memory is still 192.9MB. Free memory was 167.3MB in the beginning and 157.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 16:44:56,965 INFO L158 Benchmark]: TraceAbstraction took 45968.96ms. Allocated memory was 192.9MB in the beginning and 259.0MB in the end (delta: 66.1MB). Free memory was 156.8MB in the beginning and 223.5MB in the end (delta: -66.6MB). Peak memory consumption was 142.1MB. Max. memory is 8.0GB. [2022-03-20 16:44:56,968 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 192.9MB. Free memory was 159.5MB in the beginning and 159.5MB in the end (delta: 73.1kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 199.74ms. Allocated memory is still 192.9MB. Free memory was 143.3MB in the beginning and 168.9MB in the end (delta: -25.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.62ms. Allocated memory is still 192.9MB. Free memory was 168.9MB in the beginning and 167.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 225.95ms. Allocated memory is still 192.9MB. Free memory was 167.3MB in the beginning and 157.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 45968.96ms. Allocated memory was 192.9MB in the beginning and 259.0MB in the end (delta: 66.1MB). Free memory was 156.8MB in the beginning and 223.5MB in the end (delta: -66.6MB). Peak memory consumption was 142.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 45.9s, OverallIterations: 24, TraceHistogramMax: 23, PathProgramHistogramMax: 42, EmptinessCheckTime: 0.0s, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 78 SdHoareTripleChecker+Valid, 4.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 71 mSDsluCounter, 14591 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 13376 mSDsCounter, 31 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8992 IncrementalHoareTripleChecker+Invalid, 9023 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 31 mSolverCounterUnsat, 1215 mSDtfsCounter, 8992 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2767 GetRequests, 2274 SyntacticMatches, 22 SemanticMatches, 471 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=23, InterpolantAutomatonStates: 369, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 24 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 28 LocationsWithAnnotation, 316 PreInvPairs, 504 NumberOfFragments, 2797 HoareAnnotationTreeSize, 316 FomulaSimplifications, 1926 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 28 FomulaSimplificationsInter, 38 FormulaSimplificationTreeSizeReductionInter, 1.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((k <= 20 && c == 16) && y == 16) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 15 < k) || ((((7 == y && 7 == c) && k <= 20) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 6 < k)) || ((((y == 9 && k <= 20) && c == 9) && 8 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 20 && y == 1) && 0 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && c == 1)) || ((((7 < k && y == 8) && k <= 20) && c == 8) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((c == 17 && k <= 20) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 16 < k) && y == 17)) || ((((y == 12 && k <= 20) && c == 12) && 11 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 20 && y == 4) && c == 4) && 3 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((17 < k && k <= 20) && c == 18) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && y == 18)) || ((((k <= 20 && 5 == c) && 5 == y) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 4 < k)) || ((((k <= 20 && y == 10) && 9 < k) && c == 10) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 20 && 18 < k) && 19 == y) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 19 == c)) || ((((c == 15 && k <= 20) && y == 15) && 14 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 20 && 0 <= k) && c == 0) && y == 0) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || (((((c <= 20 && k <= 20) && 19 < k) && y == 20) && 20 <= c) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((y == 2 && 1 < k) && k <= 20) && c == 2) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((12 < k && k <= 20) && c == 13) && y == 13) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((10 < k && k <= 20) && c == 11) && y == 11) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((y == 6 && k <= 20) && c == 6) && 5 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 20 && y == 3) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && c < k + 1) && c == 3)) || ((((y == 14 && k <= 20) && 13 < k) && c == 14) && y * y * y * y + y * y + y * y * y * 2 == x * 4) - ProcedureContractResult [Line: 6]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 17]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: !(1 <= \old(cond)) || 1 <= cond RESULT: Ultimate proved your program to be correct! [2022-03-20 16:44:56,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...