/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_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 16:43:15,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 16:43:15,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 16:43:15,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 16:43:15,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 16:43:15,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 16:43:15,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 16:43:15,586 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 16:43:15,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 16:43:15,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 16:43:15,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 16:43:15,598 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 16:43:15,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 16:43:15,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 16:43:15,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 16:43:15,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 16:43:15,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 16:43:15,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 16:43:15,599 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 16:43:15,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 16:43:15,599 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 16:43:15,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 16:43:15,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 16:43:15,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 16:43:15,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 16:43:15,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 16:43:15,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 16:43:15,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 16:43:15,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 16:43:15,600 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 16:43:15,600 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 16:43:15,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 16:43:15,600 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 16:43:15,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 16:43:15,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 16:43:15,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 16:43:15,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 16:43:15,811 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 16:43:15,812 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 16:43:15,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-03-20 16:43:15,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e9ed7359/3ec1d7ab70c742649f5dab5faca376ac/FLAG2720a8b82 [2022-03-20 16:43:16,210 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 16:43:16,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-03-20 16:43:16,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e9ed7359/3ec1d7ab70c742649f5dab5faca376ac/FLAG2720a8b82 [2022-03-20 16:43:16,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e9ed7359/3ec1d7ab70c742649f5dab5faca376ac [2022-03-20 16:43:16,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 16:43:16,228 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 16:43:16,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 16:43:16,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 16:43:16,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 16:43:16,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:43:16" (1/1) ... [2022-03-20 16:43:16,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a6a48ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:43:16, skipping insertion in model container [2022-03-20 16:43:16,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:43:16" (1/1) ... [2022-03-20 16:43:16,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 16:43:16,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 16:43:16,390 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_valuebound100.c[458,471] [2022-03-20 16:43:16,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 16:43:16,411 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 16:43:16,420 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c[458,471] [2022-03-20 16:43:16,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 16:43:16,442 INFO L208 MainTranslator]: Completed translation [2022-03-20 16:43:16,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:43:16 WrapperNode [2022-03-20 16:43:16,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 16:43:16,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 16:43:16,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 16:43:16,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 16:43:16,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:43:16" (1/1) ... [2022-03-20 16:43:16,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:43:16" (1/1) ... [2022-03-20 16:43:16,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:43:16" (1/1) ... [2022-03-20 16:43:16,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:43:16" (1/1) ... [2022-03-20 16:43:16,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:43:16" (1/1) ... [2022-03-20 16:43:16,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:43:16" (1/1) ... [2022-03-20 16:43:16,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:43:16" (1/1) ... [2022-03-20 16:43:16,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 16:43:16,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 16:43:16,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 16:43:16,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 16:43:16,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:43:16" (1/1) ... [2022-03-20 16:43:16,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 16:43:16,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:16,494 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 16:43:16,511 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 16:43:16,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 16:43:16,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 16:43:16,532 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 16:43:16,532 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 16:43:16,532 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 16:43:16,533 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 16:43:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 16:43:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 16:43:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 16:43:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 16:43:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-20 16:43:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 16:43:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 16:43:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 16:43:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 16:43:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 16:43:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 16:43:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 16:43:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 16:43:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 16:43:16,572 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 16:43:16,573 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 16:43:16,662 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 16:43:16,666 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 16:43:16,666 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 16:43:16,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:43:16 BoogieIcfgContainer [2022-03-20 16:43:16,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 16:43:16,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 16:43:16,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 16:43:16,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 16:43:16,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:43:16" (1/3) ... [2022-03-20 16:43:16,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c42dcb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:43:16, skipping insertion in model container [2022-03-20 16:43:16,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:43:16" (2/3) ... [2022-03-20 16:43:16,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c42dcb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:43:16, skipping insertion in model container [2022-03-20 16:43:16,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:43:16" (3/3) ... [2022-03-20 16:43:16,672 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.c [2022-03-20 16:43:16,675 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 16:43:16,675 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 16:43:16,700 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 16:43:16,704 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 16:43:16,704 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 16:43:16,713 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 16:43:16,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 16:43:16,717 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:16,718 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 16:43:16,718 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times [2022-03-20 16:43:16,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:16,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [375806930] [2022-03-20 16:43:16,747 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:43:16,747 INFO L85 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 2 times [2022-03-20 16:43:16,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:16,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086268994] [2022-03-20 16:43:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:16,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:43:16,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 16:43:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:43:16,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 16:43:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:43:16,875 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 16:43:16,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:16,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086268994] [2022-03-20 16:43:16,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086268994] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:16,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:16,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 16:43:16,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:16,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [375806930] [2022-03-20 16:43:16,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [375806930] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:16,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:16,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 16:43:16,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336222171] [2022-03-20 16:43:16,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:16,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 16:43:16,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:16,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 16:43:16,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 16:43:16,902 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 16:43:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:16,938 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-03-20 16:43:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 16:43:16,942 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 16:43:16,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:16,946 INFO L225 Difference]: With dead ends: 47 [2022-03-20 16:43:16,946 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 16:43:16,948 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 16:43:16,950 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 16:43:16,950 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 16:43:16,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 16:43:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 16:43:16,971 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 16:43:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-20 16:43:16,973 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-03-20 16:43:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:16,973 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-20 16:43:16,973 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 16:43:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-20 16:43:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 16:43:16,974 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:16,974 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 16:43:16,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 16:43:16,975 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:16,976 INFO L85 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times [2022-03-20 16:43:16,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:16,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1478674860] [2022-03-20 16:43:16,980 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:43:16,980 INFO L85 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 2 times [2022-03-20 16:43:16,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:16,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421800002] [2022-03-20 16:43:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:16,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:17,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:17,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023500913] [2022-03-20 16:43:17,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:43:17,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:17,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:17,008 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 16:43:17,009 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 16:43:17,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 16:43:17,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:17,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 16:43:17,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:17,174 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 16:43:17,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 16:43:17,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:17,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421800002] [2022-03-20 16:43:17,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:43:17,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023500913] [2022-03-20 16:43:17,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023500913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:17,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:17,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 16:43:17,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:17,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1478674860] [2022-03-20 16:43:17,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1478674860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:17,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:17,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 16:43:17,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924781725] [2022-03-20 16:43:17,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:17,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 16:43:17,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:17,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 16:43:17,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 16:43:17,178 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 16:43:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:17,224 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-20 16:43:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 16:43:17,224 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 16:43:17,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:17,225 INFO L225 Difference]: With dead ends: 34 [2022-03-20 16:43:17,225 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 16:43:17,226 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 16:43:17,227 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 16:43:17,227 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 16:43:17,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 16:43:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 16:43:17,237 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 16:43:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-20 16:43:17,238 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-03-20 16:43:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:17,238 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-20 16:43:17,238 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 16:43:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-20 16:43:17,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 16:43:17,239 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:17,239 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 16:43:17,256 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 16:43:17,451 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 16:43:17,451 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:17,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:17,452 INFO L85 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 1 times [2022-03-20 16:43:17,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:17,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [16070717] [2022-03-20 16:43:17,467 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:43:17,467 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:43:17,467 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:43:17,467 INFO L85 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 2 times [2022-03-20 16:43:17,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:17,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341790661] [2022-03-20 16:43:17,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:17,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:17,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:17,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612227232] [2022-03-20 16:43:17,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:43:17,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:17,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:17,480 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 16:43:17,481 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 16:43:17,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:43:17,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:17,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 16:43:17,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:17,640 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 16:43:17,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:43:25,952 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 16:43:25,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:25,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341790661] [2022-03-20 16:43:25,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:43:25,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612227232] [2022-03-20 16:43:25,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612227232] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 16:43:25,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:43:25,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 16:43:25,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:25,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [16070717] [2022-03-20 16:43:25,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [16070717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:25,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:25,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 16:43:25,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770206758] [2022-03-20 16:43:25,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:25,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 16:43:25,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:25,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 16:43:25,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2022-03-20 16:43:25,956 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 16:43:25,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:25,986 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-03-20 16:43:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 16:43:25,987 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 16:43:25,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:25,987 INFO L225 Difference]: With dead ends: 36 [2022-03-20 16:43:25,987 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 16:43:25,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-03-20 16:43:25,989 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 16:43:25,989 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 16:43:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 16:43:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 16:43:25,994 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 16:43:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-20 16:43:25,995 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-03-20 16:43:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:25,995 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-20 16:43:25,995 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 16:43:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-20 16:43:25,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 16:43:25,996 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:25,996 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 16:43:26,015 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 16:43:26,203 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 16:43:26,207 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:26,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:26,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 1 times [2022-03-20 16:43:26,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:26,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670448231] [2022-03-20 16:43:26,210 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:43:26,210 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:43:26,211 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:43:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 2 times [2022-03-20 16:43:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:26,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152469404] [2022-03-20 16:43:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:26,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:26,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:26,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549006246] [2022-03-20 16:43:26,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:43:26,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:26,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:26,221 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 16:43:26,222 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 16:43:26,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:43:26,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:26,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 16:43:26,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:26,387 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 16:43:26,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:43:26,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:26,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152469404] [2022-03-20 16:43:26,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:43:26,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549006246] [2022-03-20 16:43:26,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549006246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:43:26,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:43:26,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 16:43:26,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:26,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670448231] [2022-03-20 16:43:26,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670448231] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:26,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:26,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 16:43:26,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132041110] [2022-03-20 16:43:26,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:26,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 16:43:26,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:26,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 16:43:26,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 16:43:26,524 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 16:43:26,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:26,575 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-03-20 16:43:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 16:43:26,576 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 16:43:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:26,577 INFO L225 Difference]: With dead ends: 39 [2022-03-20 16:43:26,577 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 16:43:26,578 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 16:43:26,580 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 16:43:26,581 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 16:43:26,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 16:43:26,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 16:43:26,593 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 16:43:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-03-20 16:43:26,597 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-03-20 16:43:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:26,597 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-03-20 16:43:26,598 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 16:43:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-03-20 16:43:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 16:43:26,599 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:26,599 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 16:43:26,615 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 16:43:26,807 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 16:43:26,807 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:26,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2045316535, now seen corresponding path program 3 times [2022-03-20 16:43:26,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:26,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1967482415] [2022-03-20 16:43:26,820 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:43:26,820 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:43:26,821 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:43:26,821 INFO L85 PathProgramCache]: Analyzing trace with hash -2045316535, now seen corresponding path program 4 times [2022-03-20 16:43:26,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:26,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926226444] [2022-03-20 16:43:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:26,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:26,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:26,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368539965] [2022-03-20 16:43:26,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:43:26,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:26,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:26,838 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 16:43:26,839 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 16:43:26,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:43:26,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:26,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 16:43:26,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:27,039 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 16:43:27,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:43:27,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:27,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926226444] [2022-03-20 16:43:27,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:43:27,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368539965] [2022-03-20 16:43:27,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368539965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:43:27,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:43:27,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 16:43:27,153 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:27,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1967482415] [2022-03-20 16:43:27,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1967482415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:27,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:27,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 16:43:27,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620888462] [2022-03-20 16:43:27,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:27,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 16:43:27,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:27,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 16:43:27,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 16:43:27,154 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 16:43:27,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:27,206 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-03-20 16:43:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 16:43:27,207 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 16:43:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:27,208 INFO L225 Difference]: With dead ends: 42 [2022-03-20 16:43:27,208 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 16:43:27,208 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 16:43:27,208 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 16:43:27,208 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 16:43:27,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 16:43:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 16:43:27,213 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 16:43:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-20 16:43:27,214 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2022-03-20 16:43:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:27,214 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-20 16:43:27,214 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 16:43:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-20 16:43:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 16:43:27,215 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:27,215 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 16:43:27,233 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 16:43:27,433 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 16:43:27,433 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:27,434 INFO L85 PathProgramCache]: Analyzing trace with hash -285848920, now seen corresponding path program 5 times [2022-03-20 16:43:27,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:27,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2106858811] [2022-03-20 16:43:27,436 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:43:27,436 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:43:27,437 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:43:27,437 INFO L85 PathProgramCache]: Analyzing trace with hash -285848920, now seen corresponding path program 6 times [2022-03-20 16:43:27,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:27,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419933191] [2022-03-20 16:43:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:27,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:27,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:27,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130973229] [2022-03-20 16:43:27,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:43:27,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:27,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:27,471 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 16:43:27,474 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 16:43:27,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 16:43:27,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:27,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 16:43:27,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:27,674 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 16:43:27,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:43:27,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:27,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419933191] [2022-03-20 16:43:27,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:43:27,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130973229] [2022-03-20 16:43:27,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130973229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:43:27,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:43:27,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 16:43:27,775 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:27,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2106858811] [2022-03-20 16:43:27,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2106858811] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:27,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:27,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 16:43:27,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696735718] [2022-03-20 16:43:27,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:27,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 16:43:27,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:27,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 16:43:27,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 16:43:27,777 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 16:43:27,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:27,844 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-03-20 16:43:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 16:43:27,844 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 16:43:27,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:27,847 INFO L225 Difference]: With dead ends: 45 [2022-03-20 16:43:27,847 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 16:43:27,847 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 16:43:27,848 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 16:43:27,849 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 16:43:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 16:43:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-20 16:43:27,856 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 16:43:27,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-03-20 16:43:27,858 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 44 [2022-03-20 16:43:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:27,858 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-03-20 16:43:27,859 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 16:43:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-03-20 16:43:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 16:43:27,859 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:27,859 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 16:43:27,876 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 16:43:28,075 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 16:43:28,075 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:28,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:28,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1858889367, now seen corresponding path program 7 times [2022-03-20 16:43:28,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:28,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1289909109] [2022-03-20 16:43:28,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:43:28,078 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:43:28,078 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:43:28,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1858889367, now seen corresponding path program 8 times [2022-03-20 16:43:28,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:28,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128617150] [2022-03-20 16:43:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:28,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:28,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:28,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071638164] [2022-03-20 16:43:28,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:43:28,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:28,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:28,091 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 16:43:28,092 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 16:43:28,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:43:28,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:28,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 16:43:28,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:28,336 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 16:43:28,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:43:28,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:28,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128617150] [2022-03-20 16:43:28,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:43:28,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071638164] [2022-03-20 16:43:28,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071638164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:43:28,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:43:28,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 16:43:28,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:28,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1289909109] [2022-03-20 16:43:28,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1289909109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:28,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:28,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 16:43:28,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342376774] [2022-03-20 16:43:28,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:28,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 16:43:28,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:28,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 16:43:28,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 16:43:28,435 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 16:43:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:28,520 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-03-20 16:43:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 16:43:28,520 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 16:43:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:28,521 INFO L225 Difference]: With dead ends: 48 [2022-03-20 16:43:28,521 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 16:43:28,521 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 16:43:28,521 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 16:43:28,522 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 16:43:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 16:43:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 16:43:28,527 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 16:43:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-03-20 16:43:28,527 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 51 [2022-03-20 16:43:28,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:28,527 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-03-20 16:43:28,527 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 16:43:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-03-20 16:43:28,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 16:43:28,528 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:28,528 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 16:43:28,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 16:43:28,743 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 16:43:28,743 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:28,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1288003464, now seen corresponding path program 9 times [2022-03-20 16:43:28,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:28,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438278812] [2022-03-20 16:43:28,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:43:28,746 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:43:28,746 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:43:28,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1288003464, now seen corresponding path program 10 times [2022-03-20 16:43:28,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:28,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611907599] [2022-03-20 16:43:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:28,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:28,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:28,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473518197] [2022-03-20 16:43:28,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:43:28,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:28,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:28,754 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 16:43:28,755 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 16:43:28,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:43:28,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:28,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 16:43:28,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:29,005 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 16:43:29,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:43:29,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:29,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611907599] [2022-03-20 16:43:29,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:43:29,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473518197] [2022-03-20 16:43:29,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473518197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:43:29,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:43:29,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 16:43:29,104 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:29,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438278812] [2022-03-20 16:43:29,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438278812] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:29,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:29,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 16:43:29,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979480072] [2022-03-20 16:43:29,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:29,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 16:43:29,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:29,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 16:43:29,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 16:43:29,106 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 16:43:29,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:29,203 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-03-20 16:43:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 16:43:29,204 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 16:43:29,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:29,204 INFO L225 Difference]: With dead ends: 51 [2022-03-20 16:43:29,204 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 16:43:29,205 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 16:43:29,205 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 16:43:29,205 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 16:43:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 16:43:29,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 16:43:29,210 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 16:43:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-03-20 16:43:29,211 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 58 [2022-03-20 16:43:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:29,211 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-03-20 16:43:29,213 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 16:43:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-03-20 16:43:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 16:43:29,214 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:29,214 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 16:43:29,227 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 16:43:29,418 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 16:43:29,419 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:29,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:29,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1494042761, now seen corresponding path program 11 times [2022-03-20 16:43:29,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:29,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1915423111] [2022-03-20 16:43:29,421 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:43:29,421 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:43:29,421 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:43:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1494042761, now seen corresponding path program 12 times [2022-03-20 16:43:29,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:29,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432009989] [2022-03-20 16:43:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:29,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:29,427 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:29,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738642820] [2022-03-20 16:43:29,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:43:29,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:29,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:29,429 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 16:43:29,430 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 16:43:29,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 16:43:29,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:29,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 16:43:29,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:29,802 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 16:43:29,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:43:29,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:29,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432009989] [2022-03-20 16:43:29,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:43:29,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738642820] [2022-03-20 16:43:29,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738642820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:43:29,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:43:29,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 16:43:29,945 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:29,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1915423111] [2022-03-20 16:43:29,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1915423111] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:29,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:29,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 16:43:29,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632537174] [2022-03-20 16:43:29,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:29,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 16:43:29,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:29,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 16:43:29,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-20 16:43:29,946 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 16:43:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:30,057 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-03-20 16:43:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 16:43:30,057 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 16:43:30,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:30,058 INFO L225 Difference]: With dead ends: 54 [2022-03-20 16:43:30,058 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 16:43:30,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-20 16:43:30,059 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 16:43:30,059 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 16:43:30,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 16:43:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-20 16:43:30,064 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 16:43:30,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-03-20 16:43:30,065 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2022-03-20 16:43:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:30,065 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-03-20 16:43:30,065 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 16:43:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-03-20 16:43:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 16:43:30,066 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:30,066 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 16:43:30,079 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 16:43:30,278 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 16:43:30,278 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:30,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1734448024, now seen corresponding path program 13 times [2022-03-20 16:43:30,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:30,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [419828768] [2022-03-20 16:43:30,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:43:30,280 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:43:30,280 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:43:30,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1734448024, now seen corresponding path program 14 times [2022-03-20 16:43:30,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:30,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056336954] [2022-03-20 16:43:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:30,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:30,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:30,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186819158] [2022-03-20 16:43:30,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:43:30,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:30,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:30,287 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 16:43:30,289 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 16:43:30,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:43:30,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:30,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 16:43:30,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:30,687 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 16:43:30,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:43:30,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:30,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056336954] [2022-03-20 16:43:30,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:43:30,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186819158] [2022-03-20 16:43:30,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186819158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:43:30,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:43:30,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 16:43:30,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:30,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [419828768] [2022-03-20 16:43:30,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [419828768] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:30,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:30,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 16:43:30,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197758880] [2022-03-20 16:43:30,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:30,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 16:43:30,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:30,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 16:43:30,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 16:43:30,791 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 16:43:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:30,929 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-03-20 16:43:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 16:43:30,929 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 16:43:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:30,930 INFO L225 Difference]: With dead ends: 57 [2022-03-20 16:43:30,930 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 16:43:30,931 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 16:43:30,931 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 16:43:30,931 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 16:43:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 16:43:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-20 16:43:30,937 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 16:43:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-03-20 16:43:30,937 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 72 [2022-03-20 16:43:30,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:30,937 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-03-20 16:43:30,937 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 16:43:30,938 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-03-20 16:43:30,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 16:43:30,938 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:30,938 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 16:43:30,945 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 16:43:31,143 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 16:43:31,143 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:31,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:31,143 INFO L85 PathProgramCache]: Analyzing trace with hash 708181929, now seen corresponding path program 15 times [2022-03-20 16:43:31,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:31,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [995831350] [2022-03-20 16:43:31,145 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:43:31,145 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:43:31,145 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:43:31,145 INFO L85 PathProgramCache]: Analyzing trace with hash 708181929, now seen corresponding path program 16 times [2022-03-20 16:43:31,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:31,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205901140] [2022-03-20 16:43:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:31,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:31,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:31,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472740535] [2022-03-20 16:43:31,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:43:31,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:31,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:31,152 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 16:43:31,171 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 16:43:31,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:43:31,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:31,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 16:43:31,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:31,813 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 16:43:31,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:43:31,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:31,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205901140] [2022-03-20 16:43:31,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:43:31,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472740535] [2022-03-20 16:43:31,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472740535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:43:31,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:43:31,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 16:43:31,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:31,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [995831350] [2022-03-20 16:43:31,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [995831350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:31,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:31,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 16:43:31,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335381153] [2022-03-20 16:43:31,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:31,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 16:43:31,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:31,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 16:43:31,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-20 16:43:31,978 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 16:43:32,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:32,122 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-03-20 16:43:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 16:43:32,123 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 16:43:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:32,123 INFO L225 Difference]: With dead ends: 60 [2022-03-20 16:43:32,123 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 16:43:32,123 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 16:43:32,124 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 16:43:32,124 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 16:43:32,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 16:43:32,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 16:43:32,129 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 16:43:32,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-03-20 16:43:32,130 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2022-03-20 16:43:32,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:32,130 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-03-20 16:43:32,130 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 16:43:32,130 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-03-20 16:43:32,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 16:43:32,131 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:32,131 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 16:43:32,138 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 16:43:32,336 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 16:43:32,336 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1649446584, now seen corresponding path program 17 times [2022-03-20 16:43:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:32,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [131753289] [2022-03-20 16:43:32,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:43:32,338 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:43:32,338 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:43:32,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1649446584, now seen corresponding path program 18 times [2022-03-20 16:43:32,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:32,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652109650] [2022-03-20 16:43:32,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:32,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:32,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:32,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306215142] [2022-03-20 16:43:32,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:43:32,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:32,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:32,353 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 16:43:32,357 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 16:43:33,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 16:43:33,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:33,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 16:43:33,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 16:43:33,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:43:37,697 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse1 (* 13 c_main_~y~0 c_main_~y~0)) (.cse2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (not (<= (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))) (div (+ .cse0 .cse1 4 .cse2) 4))) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse3 (+ c_main_~y~0 1))) (= (* .cse3 .cse3) (* main_~k~0 .cse3))))) (not (= 0 (mod (+ .cse0 .cse1 .cse2) 4))))) is different from false [2022-03-20 16:43:41,743 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= 0 (mod (+ (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 13 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4)))) is different from false [2022-03-20 16:43:41,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:41,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652109650] [2022-03-20 16:43:41,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:43:41,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306215142] [2022-03-20 16:43:41,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306215142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:43:41,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:43:41,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-20 16:43:41,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:41,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [131753289] [2022-03-20 16:43:41,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [131753289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:41,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:41,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 16:43:41,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407405349] [2022-03-20 16:43:41,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:41,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 16:43:41,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:41,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 16:43:41,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=446, Unknown=2, NotChecked=86, Total=600 [2022-03-20 16:43:41,747 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 16:43:42,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:42,001 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-03-20 16:43:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 16:43:42,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 86 [2022-03-20 16:43:42,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:42,002 INFO L225 Difference]: With dead ends: 63 [2022-03-20 16:43:42,002 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 16:43:42,002 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=87, Invalid=569, Unknown=2, NotChecked=98, Total=756 [2022-03-20 16:43:42,002 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 16:43:42,002 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 571 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 16:43:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 16:43:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-20 16:43:42,008 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 16:43:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-03-20 16:43:42,008 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 86 [2022-03-20 16:43:42,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:42,009 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-03-20 16:43:42,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 16:43:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-03-20 16:43:42,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 16:43:42,009 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:42,010 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 16:43:42,014 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 16:43:42,214 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 16:43:42,214 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:42,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:42,215 INFO L85 PathProgramCache]: Analyzing trace with hash -373309751, now seen corresponding path program 19 times [2022-03-20 16:43:42,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:42,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1646764194] [2022-03-20 16:43:42,217 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:43:42,217 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:43:42,217 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:43:42,217 INFO L85 PathProgramCache]: Analyzing trace with hash -373309751, now seen corresponding path program 20 times [2022-03-20 16:43:42,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:42,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563417016] [2022-03-20 16:43:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:42,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:42,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:42,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029552683] [2022-03-20 16:43:42,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:43:42,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:42,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:42,234 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 16:43:42,235 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 16:43:42,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:43:42,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:42,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 16:43:42,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:43,151 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 16:43:43,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:43:43,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:43,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563417016] [2022-03-20 16:43:43,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:43:43,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029552683] [2022-03-20 16:43:43,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029552683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:43:43,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:43:43,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 16:43:43,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:43,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1646764194] [2022-03-20 16:43:43,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1646764194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:43,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:43,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 16:43:43,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509035240] [2022-03-20 16:43:43,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:43,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 16:43:43,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:43,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 16:43:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-20 16:43:43,272 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 16:43:43,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:43,471 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-03-20 16:43:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 16:43:43,471 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 16:43:43,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:43,472 INFO L225 Difference]: With dead ends: 66 [2022-03-20 16:43:43,472 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 16:43:43,472 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 16:43:43,473 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 16:43:43,473 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 16:43:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 16:43:43,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-20 16:43:43,478 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 16:43:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-03-20 16:43:43,479 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 93 [2022-03-20 16:43:43,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:43,479 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-03-20 16:43:43,479 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 16:43:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-03-20 16:43:43,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 16:43:43,480 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:43,480 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 16:43:43,491 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 16:43:43,680 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 16:43:43,680 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash -22647256, now seen corresponding path program 21 times [2022-03-20 16:43:43,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:43,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [867093328] [2022-03-20 16:43:43,682 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:43:43,682 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:43:43,683 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:43:43,683 INFO L85 PathProgramCache]: Analyzing trace with hash -22647256, now seen corresponding path program 22 times [2022-03-20 16:43:43,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:43,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846989073] [2022-03-20 16:43:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:43,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:43,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:43,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361057674] [2022-03-20 16:43:43,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:43:43,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:43,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:43,696 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 16:43:43,697 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 16:43:44,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:43:44,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:44,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 16:43:44,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:45,095 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 16:43:45,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:43:45,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:43:45,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846989073] [2022-03-20 16:43:45,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:43:45,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361057674] [2022-03-20 16:43:45,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361057674] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:43:45,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:43:45,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 16:43:45,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:43:45,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [867093328] [2022-03-20 16:43:45,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [867093328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:43:45,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:43:45,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 16:43:45,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855374054] [2022-03-20 16:43:45,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:43:45,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 16:43:45,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:45,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 16:43:45,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-20 16:43:45,218 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 16:43:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:43:45,459 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-03-20 16:43:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 16:43:45,459 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 16:43:45,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:43:45,460 INFO L225 Difference]: With dead ends: 69 [2022-03-20 16:43:45,460 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 16:43:45,461 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 16:43:45,461 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 16:43:45,461 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 16:43:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 16:43:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-20 16:43:45,467 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 16:43:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-20 16:43:45,468 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 100 [2022-03-20 16:43:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:43:45,468 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-20 16:43:45,468 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 16:43:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-20 16:43:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 16:43:45,469 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:43:45,469 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 16:43:45,474 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 16:43:45,674 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 16:43:45,674 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:43:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:43:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash 893158889, now seen corresponding path program 23 times [2022-03-20 16:43:45,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:43:45,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [26681417] [2022-03-20 16:43:45,676 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:43:45,676 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:43:45,676 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:43:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash 893158889, now seen corresponding path program 24 times [2022-03-20 16:43:45,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:43:45,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081554370] [2022-03-20 16:43:45,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:43:45,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:43:45,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:43:45,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510237568] [2022-03-20 16:43:45,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:43:45,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:43:45,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:43:45,684 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 16:43:45,685 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 16:43:45,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 16:43:45,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:43:45,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 16:43:45,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:43:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 90 proven. 236 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-20 16:43:46,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:44:16,792 WARN L833 $PredicateComparison]: unable to prove that (or (= (+ (* c_main_~y~0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1)) (<= c_main_~k~0 c_main_~c~0) (not (= 0 (mod (+ (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 13 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4))) (< (+ c_main_~c~0 1) c_main_~k~0)) is different from false [2022-03-20 16:44:22,831 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~y~0 1))) (or (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) 3 (* .cse0 .cse0))) (< (+ 2 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ c_main_~c~0 1)) (not (= (mod (+ (* 6 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 .cse0) (* 13 .cse0 .cse0)) 4) 0)))) is different from false [2022-03-20 16:46:30,688 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ 6 c_main_~y~0))) (+ (* .cse0 .cse0 .cse0 6) (* .cse0 .cse0 13) (* .cse0 .cse0 .cse0 .cse0))) 4) 0)) (forall ((main_~k~0 Int)) (or (<= main_~k~0 (+ 6 c_main_~c~0)) (< (+ 7 c_main_~c~0) main_~k~0) (= (+ (* 7 main_~k~0) (* main_~k~0 c_main_~y~0)) (+ (* 14 c_main_~y~0) 49 (* c_main_~y~0 c_main_~y~0)))))) is different from false [2022-03-20 16:46:32,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:46:32,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081554370] [2022-03-20 16:46:32,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:46:32,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510237568] [2022-03-20 16:46:32,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510237568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:46:32,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:46:32,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 16:46:32,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:46:32,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [26681417] [2022-03-20 16:46:32,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [26681417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:46:32,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:46:32,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 16:46:32,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489509240] [2022-03-20 16:46:32,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:46:32,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 16:46:32,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:32,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 16:46:32,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=780, Unknown=11, NotChecked=180, Total=1122 [2022-03-20 16:46:32,710 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 16:46:33,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:46:33,083 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-03-20 16:46:33,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 16:46:33,083 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 107 [2022-03-20 16:46:33,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:46:33,084 INFO L225 Difference]: With dead ends: 72 [2022-03-20 16:46:33,084 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 16:46:33,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 126.2s TimeCoverageRelationStatistics Valid=172, Invalid=951, Unknown=11, NotChecked=198, Total=1332 [2022-03-20 16:46:33,085 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 16:46:33,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 709 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 16:46:33,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 16:46:33,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-20 16:46:33,091 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 16:46:33,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-03-20 16:46:33,092 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 107 [2022-03-20 16:46:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:46:33,092 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-03-20 16:46:33,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 16:46:33,092 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-03-20 16:46:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 16:46:33,093 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:46:33,093 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 16:46:33,101 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 16:46:33,297 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 16:46:33,298 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:46:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:46:33,298 INFO L85 PathProgramCache]: Analyzing trace with hash 363946760, now seen corresponding path program 25 times [2022-03-20 16:46:33,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:33,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2113314222] [2022-03-20 16:46:33,299 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:46:33,300 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:46:33,300 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:46:33,300 INFO L85 PathProgramCache]: Analyzing trace with hash 363946760, now seen corresponding path program 26 times [2022-03-20 16:46:33,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:46:33,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111818783] [2022-03-20 16:46:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:46:33,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:46:33,308 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:46:33,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904473846] [2022-03-20 16:46:33,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:46:33,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:46:33,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:46:33,311 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 16:46:33,311 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 16:46:34,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:46:34,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:46:34,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 16:46:34,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:46:34,445 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 16:46:34,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:46:34,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:46:34,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111818783] [2022-03-20 16:46:34,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:46:34,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904473846] [2022-03-20 16:46:34,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904473846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:46:34,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:46:34,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-20 16:46:34,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:46:34,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2113314222] [2022-03-20 16:46:34,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2113314222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:46:34,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:46:34,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 16:46:34,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478751205] [2022-03-20 16:46:34,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:46:34,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 16:46:34,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:34,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 16:46:34,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-20 16:46:34,599 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 16:46:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:46:34,890 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-03-20 16:46:34,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 16:46:34,891 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 16:46:34,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:46:34,891 INFO L225 Difference]: With dead ends: 75 [2022-03-20 16:46:34,891 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 16:46:34,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-20 16:46:34,892 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 16:46:34,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 825 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 16:46:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 16:46:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-20 16:46:34,899 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 16:46:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-03-20 16:46:34,899 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 114 [2022-03-20 16:46:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:46:34,899 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-03-20 16:46:34,900 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 16:46:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-03-20 16:46:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 16:46:34,900 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:46:34,900 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 16:46:34,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 16:46:35,105 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 16:46:35,105 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:46:35,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:46:35,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2101455607, now seen corresponding path program 27 times [2022-03-20 16:46:35,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:35,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7018416] [2022-03-20 16:46:35,107 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:46:35,108 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:46:35,108 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:46:35,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2101455607, now seen corresponding path program 28 times [2022-03-20 16:46:35,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:46:35,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9504095] [2022-03-20 16:46:35,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:46:35,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:46:35,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:46:35,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756181396] [2022-03-20 16:46:35,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:46:35,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:46:35,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:46:35,115 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 16:46:35,116 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 16:46:35,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:46:35,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:46:35,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 16:46:35,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:46:36,347 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 16:46:36,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:46:36,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:46:36,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9504095] [2022-03-20 16:46:36,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:46:36,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756181396] [2022-03-20 16:46:36,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756181396] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:46:36,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:46:36,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 16:46:36,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:46:36,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7018416] [2022-03-20 16:46:36,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7018416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:46:36,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:46:36,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 16:46:36,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626037228] [2022-03-20 16:46:36,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:46:36,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 16:46:36,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:36,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 16:46:36,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-20 16:46:36,516 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 16:46:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:46:36,817 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2022-03-20 16:46:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 16:46:36,818 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 16:46:36,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:46:36,818 INFO L225 Difference]: With dead ends: 78 [2022-03-20 16:46:36,818 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 16:46:36,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-20 16:46:36,819 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 16:46:36,819 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 16:46:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 16:46:36,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-20 16:46:36,826 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 16:46:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-03-20 16:46:36,827 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 121 [2022-03-20 16:46:36,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:46:36,827 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-03-20 16:46:36,827 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 16:46:36,827 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-03-20 16:46:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 16:46:36,828 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:46:36,828 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 16:46:36,833 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 16:46:37,031 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 16:46:37,031 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:46:37,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:46:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash -729919512, now seen corresponding path program 29 times [2022-03-20 16:46:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:37,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [833684710] [2022-03-20 16:46:37,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:46:37,033 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:46:37,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:46:37,034 INFO L85 PathProgramCache]: Analyzing trace with hash -729919512, now seen corresponding path program 30 times [2022-03-20 16:46:37,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:46:37,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591253134] [2022-03-20 16:46:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:46:37,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:46:37,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:46:37,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267527121] [2022-03-20 16:46:37,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:46:37,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:46:37,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:46:37,041 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 16:46:37,042 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 16:46:37,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 16:46:37,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:46:37,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 16:46:37,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:46:37,907 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 16:46:37,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:46:38,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:46:38,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591253134] [2022-03-20 16:46:38,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:46:38,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267527121] [2022-03-20 16:46:38,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267527121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:46:38,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:46:38,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 16:46:38,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:46:38,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [833684710] [2022-03-20 16:46:38,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [833684710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:46:38,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:46:38,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 16:46:38,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628125927] [2022-03-20 16:46:38,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:46:38,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 16:46:38,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:38,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 16:46:38,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-03-20 16:46:38,418 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 16:46:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:46:38,778 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-03-20 16:46:38,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 16:46:38,778 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 16:46:38,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:46:38,779 INFO L225 Difference]: With dead ends: 81 [2022-03-20 16:46:38,779 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 16:46:38,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 16:46:38,780 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 16:46:38,780 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 16:46:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 16:46:38,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-20 16:46:38,787 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 16:46:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2022-03-20 16:46:38,788 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 128 [2022-03-20 16:46:38,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:46:38,788 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2022-03-20 16:46:38,788 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 16:46:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2022-03-20 16:46:38,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 16:46:38,789 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:46:38,789 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 16:46:38,796 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 16:46:38,994 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 16:46:38,995 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:46:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:46:38,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1087843369, now seen corresponding path program 31 times [2022-03-20 16:46:38,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:38,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1258450202] [2022-03-20 16:46:38,997 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:46:38,997 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:46:38,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:46:38,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1087843369, now seen corresponding path program 32 times [2022-03-20 16:46:38,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:46:38,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014675948] [2022-03-20 16:46:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:46:38,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:46:39,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:46:39,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775252790] [2022-03-20 16:46:39,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:46:39,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:46:39,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:46:39,008 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 16:46:39,009 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 16:46:39,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:46:39,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:46:39,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 16:46:39,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:46:40,017 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 16:46:40,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:46:40,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:46:40,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014675948] [2022-03-20 16:46:40,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:46:40,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775252790] [2022-03-20 16:46:40,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775252790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:46:40,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:46:40,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 16:46:40,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:46:40,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1258450202] [2022-03-20 16:46:40,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1258450202] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:46:40,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:46:40,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 16:46:40,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950271533] [2022-03-20 16:46:40,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:46:40,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 16:46:40,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:40,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 16:46:40,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-20 16:46:40,148 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 16:46:40,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:46:40,530 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2022-03-20 16:46:40,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 16:46:40,531 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 16:46:40,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:46:40,532 INFO L225 Difference]: With dead ends: 84 [2022-03-20 16:46:40,532 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 16:46:40,532 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-20 16:46:40,532 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 16:46:40,533 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 16:46:40,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 16:46:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-20 16:46:40,540 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 16:46:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-03-20 16:46:40,544 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 135 [2022-03-20 16:46:40,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:46:40,545 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-03-20 16:46:40,545 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 16:46:40,545 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-03-20 16:46:40,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-20 16:46:40,546 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:46:40,546 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 16:46:40,553 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 16:46:40,746 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 16:46:40,747 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:46:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:46:40,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1539623736, now seen corresponding path program 33 times [2022-03-20 16:46:40,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:40,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [677003429] [2022-03-20 16:46:40,749 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:46:40,749 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:46:40,749 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:46:40,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1539623736, now seen corresponding path program 34 times [2022-03-20 16:46:40,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:46:40,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555168636] [2022-03-20 16:46:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:46:40,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:46:40,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:46:40,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864344711] [2022-03-20 16:46:40,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:46:40,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:46:40,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:46:40,756 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 16:46:40,757 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 16:46:41,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:46:41,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:46:41,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 16:46:41,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:46:41,698 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 16:46:41,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:46:41,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:46:41,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555168636] [2022-03-20 16:46:41,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:46:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864344711] [2022-03-20 16:46:41,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864344711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:46:41,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:46:41,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 16:46:41,876 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:46:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [677003429] [2022-03-20 16:46:41,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [677003429] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:46:41,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:46:41,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 16:46:41,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979213000] [2022-03-20 16:46:41,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:46:41,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 16:46:41,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 16:46:41,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-20 16:46:41,878 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 16:46:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:46:42,314 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2022-03-20 16:46:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 16:46:42,315 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 16:46:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:46:42,316 INFO L225 Difference]: With dead ends: 87 [2022-03-20 16:46:42,316 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 16:46:42,316 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 16:46:42,317 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 16:46:42,317 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 16:46:42,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 16:46:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-20 16:46:42,324 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 16:46:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-03-20 16:46:42,325 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 142 [2022-03-20 16:46:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:46:42,325 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-03-20 16:46:42,325 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 16:46:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-03-20 16:46:42,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 16:46:42,326 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:46:42,326 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 16:46:42,331 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 16:46:42,531 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 16:46:42,531 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:46:42,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:46:42,531 INFO L85 PathProgramCache]: Analyzing trace with hash -157742263, now seen corresponding path program 35 times [2022-03-20 16:46:42,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:42,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [565518924] [2022-03-20 16:46:42,533 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:46:42,533 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:46:42,533 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:46:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash -157742263, now seen corresponding path program 36 times [2022-03-20 16:46:42,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:46:42,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483392881] [2022-03-20 16:46:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:46:42,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:46:42,539 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:46:42,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435207647] [2022-03-20 16:46:42,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:46:42,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:46:42,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:46:42,540 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 16:46:42,541 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 16:46:51,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 16:46:51,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:46:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 16:46:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:46:51,598 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 16:46:51,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:46:51,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:46:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483392881] [2022-03-20 16:46:51,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:46:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435207647] [2022-03-20 16:46:51,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435207647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:46:51,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:46:51,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-20 16:46:51,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:46:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [565518924] [2022-03-20 16:46:51,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [565518924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:46:51,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:46:51,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 16:46:51,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693998855] [2022-03-20 16:46:51,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:46:51,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 16:46:51,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:51,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 16:46:51,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-20 16:46:51,778 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 16:46:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:46:52,230 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-03-20 16:46:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 16:46:52,230 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 16:46:52,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:46:52,231 INFO L225 Difference]: With dead ends: 90 [2022-03-20 16:46:52,231 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 16:46:52,232 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 16:46:52,232 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 16:46:52,232 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 16:46:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 16:46:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-20 16:46:52,240 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 16:46:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-03-20 16:46:52,241 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 149 [2022-03-20 16:46:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:46:52,241 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-03-20 16:46:52,241 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 16:46:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-03-20 16:46:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-20 16:46:52,242 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:46:52,242 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 16:46:52,258 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 16:46:52,450 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 16:46:52,450 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:46:52,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:46:52,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1167462824, now seen corresponding path program 37 times [2022-03-20 16:46:52,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:52,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2074585637] [2022-03-20 16:46:52,472 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:46:52,472 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:46:52,473 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:46:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1167462824, now seen corresponding path program 38 times [2022-03-20 16:46:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:46:52,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014795256] [2022-03-20 16:46:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:46:52,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:46:52,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:46:52,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427107739] [2022-03-20 16:46:52,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:46:52,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:46:52,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:46:52,480 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 16:46:52,481 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 16:46:52,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:46:52,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:46:52,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 16:46:52,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:46:53,584 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 16:46:53,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:46:54,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:46:54,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014795256] [2022-03-20 16:46:54,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:46:54,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427107739] [2022-03-20 16:46:54,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427107739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:46:54,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:46:54,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-03-20 16:46:54,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:46:54,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2074585637] [2022-03-20 16:46:54,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2074585637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:46:54,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:46:54,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 16:46:54,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702101449] [2022-03-20 16:46:54,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:46:54,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 16:46:54,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:54,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 16:46:54,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1613, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 16:46:54,988 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 16:46:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:46:55,503 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-03-20 16:46:55,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 16:46:55,505 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 16:46:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:46:55,506 INFO L225 Difference]: With dead ends: 93 [2022-03-20 16:46:55,506 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 16:46:55,507 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 16:46:55,508 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 16:46:55,508 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 16:46:55,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 16:46:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 16:46:55,516 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 16:46:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-03-20 16:46:55,517 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 156 [2022-03-20 16:46:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:46:55,517 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-03-20 16:46:55,517 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 16:46:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-03-20 16:46:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 16:46:55,518 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:46:55,518 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 16:46:55,525 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 16:46:55,727 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 16:46:55,727 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:46:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:46:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1670771305, now seen corresponding path program 39 times [2022-03-20 16:46:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:55,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [583821451] [2022-03-20 16:46:55,729 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:46:55,729 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:46:55,729 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:46:55,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1670771305, now seen corresponding path program 40 times [2022-03-20 16:46:55,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:46:55,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124513883] [2022-03-20 16:46:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:46:55,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:46:55,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:46:55,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54706605] [2022-03-20 16:46:55,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:46:55,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:46:55,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:46:55,736 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 16:46:55,737 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 16:46:56,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:46:56,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:46:56,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 16:46:56,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:46:56,766 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 16:46:56,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:46:56,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:46:56,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124513883] [2022-03-20 16:46:56,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:46:56,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54706605] [2022-03-20 16:46:56,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54706605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:46:56,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:46:56,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-20 16:46:56,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:46:56,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [583821451] [2022-03-20 16:46:56,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [583821451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:46:56,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:46:56,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 16:46:56,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402151944] [2022-03-20 16:46:56,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:46:56,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 16:46:56,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:56,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 16:46:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-20 16:46:56,969 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 16:46:57,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:46:57,513 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2022-03-20 16:46:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 16:46:57,515 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 16:46:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:46:57,516 INFO L225 Difference]: With dead ends: 96 [2022-03-20 16:46:57,516 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 16:46:57,516 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 16:46:57,517 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 16:46:57,517 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 16:46:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 16:46:57,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-20 16:46:57,526 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 16:46:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-03-20 16:46:57,526 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 163 [2022-03-20 16:46:57,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:46:57,526 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-03-20 16:46:57,526 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 16:46:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-03-20 16:46:57,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-20 16:46:57,528 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:46:57,528 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 16:46:57,533 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 16:46:57,732 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 16:46:57,733 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:46:57,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:46:57,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1329797496, now seen corresponding path program 41 times [2022-03-20 16:46:57,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:46:57,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1977466677] [2022-03-20 16:46:57,735 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:46:57,735 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:46:57,735 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:46:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1329797496, now seen corresponding path program 42 times [2022-03-20 16:46:57,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:46:57,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068216744] [2022-03-20 16:46:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:46:57,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:46:57,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:46:57,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250197158] [2022-03-20 16:46:57,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:46:57,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:46:57,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:46:57,742 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 16:46:57,743 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 16:47:00,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 16:47:00,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:47:00,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-20 16:47:00,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:47:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-20 16:47:00,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:47:00,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:47:00,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068216744] [2022-03-20 16:47:00,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:47:00,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250197158] [2022-03-20 16:47:00,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250197158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:47:00,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:47:00,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-20 16:47:00,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:47:00,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1977466677] [2022-03-20 16:47:00,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1977466677] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:47:00,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:47:00,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 16:47:00,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200934765] [2022-03-20 16:47:00,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:47:00,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 16:47:00,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:47:00,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 16:47:00,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-20 16:47:00,813 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 16:47:01,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:47:01,372 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2022-03-20 16:47:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 16:47:01,372 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 170 [2022-03-20 16:47:01,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:47:01,373 INFO L225 Difference]: With dead ends: 99 [2022-03-20 16:47:01,373 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 16:47:01,374 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-20 16:47:01,374 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 2 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 16:47:01,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1609 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 16:47:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 16:47:01,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-03-20 16:47:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 27 states have call successors, (27), 6 states have call predecessors, (27), 4 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 16:47:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-03-20 16:47:01,387 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 170 [2022-03-20 16:47:01,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:47:01,388 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-03-20 16:47:01,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 16:47:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-03-20 16:47:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-20 16:47:01,389 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:47:01,389 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:47:01,396 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 16:47:01,591 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 16:47:01,591 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:47:01,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:47:01,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1612717687, now seen corresponding path program 43 times [2022-03-20 16:47:01,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:47:01,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769005052] [2022-03-20 16:47:01,593 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:47:01,593 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:47:01,593 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:47:01,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1612717687, now seen corresponding path program 44 times [2022-03-20 16:47:01,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:47:01,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195790319] [2022-03-20 16:47:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:47:01,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:47:01,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:47:01,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777822844] [2022-03-20 16:47:01,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:47:01,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:47:01,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:47:01,600 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:47:01,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 16:47:02,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:47:02,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:47:02,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 16:47:02,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:47:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-20 16:47:02,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:47:02,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:47:02,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195790319] [2022-03-20 16:47:02,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:47:02,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777822844] [2022-03-20 16:47:02,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777822844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:47:02,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:47:02,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-20 16:47:02,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:47:02,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769005052] [2022-03-20 16:47:02,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769005052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:47:02,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:47:02,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 16:47:02,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901980263] [2022-03-20 16:47:02,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:47:02,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 16:47:02,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:47:02,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 16:47:02,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-03-20 16:47:02,924 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 16:47:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:47:03,558 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2022-03-20 16:47:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 16:47:03,558 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) Word has length 177 [2022-03-20 16:47:03,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:47:03,559 INFO L225 Difference]: With dead ends: 102 [2022-03-20 16:47:03,559 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 16:47:03,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 16:47:03,560 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 2 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 16:47:03,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1725 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 16:47:03,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 16:47:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-20 16:47:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 28 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 16:47:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2022-03-20 16:47:03,570 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 177 [2022-03-20 16:47:03,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:47:03,570 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2022-03-20 16:47:03,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 16:47:03,570 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2022-03-20 16:47:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-03-20 16:47:03,571 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:47:03,571 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:47:03,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 16:47:03,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 16:47:03,776 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:47:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:47:03,777 INFO L85 PathProgramCache]: Analyzing trace with hash -178408600, now seen corresponding path program 45 times [2022-03-20 16:47:03,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:47:03,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7910564] [2022-03-20 16:47:03,778 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:47:03,778 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:47:03,778 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:47:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash -178408600, now seen corresponding path program 46 times [2022-03-20 16:47:03,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:47:03,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369314985] [2022-03-20 16:47:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:47:03,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:47:03,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:47:03,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048397225] [2022-03-20 16:47:03,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:47:03,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:47:03,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:47:03,786 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:47:03,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 16:47:04,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:47:04,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:47:04,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 16:47:04,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:47:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-20 16:47:04,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:47:05,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:47:05,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369314985] [2022-03-20 16:47:05,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:47:05,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048397225] [2022-03-20 16:47:05,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048397225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:47:05,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:47:05,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-03-20 16:47:05,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:47:05,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7910564] [2022-03-20 16:47:05,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7910564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:47:05,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:47:05,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 16:47:05,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218093153] [2022-03-20 16:47:05,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:47:05,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 16:47:05,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:47:05,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 16:47:05,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-03-20 16:47:05,091 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-20 16:47:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:47:05,762 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2022-03-20 16:47:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 16:47:05,762 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) Word has length 184 [2022-03-20 16:47:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:47:05,763 INFO L225 Difference]: With dead ends: 105 [2022-03-20 16:47:05,763 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 16:47:05,763 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 16:47:05,764 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 2 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 16:47:05,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1845 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 16:47:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 16:47:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-20 16:47:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 29 states have call successors, (29), 6 states have call predecessors, (29), 4 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 16:47:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2022-03-20 16:47:05,774 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 184 [2022-03-20 16:47:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:47:05,774 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2022-03-20 16:47:05,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-20 16:47:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2022-03-20 16:47:05,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-20 16:47:05,775 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:47:05,775 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:47:05,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 16:47:05,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 16:47:05,980 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:47:05,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:47:05,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1007212713, now seen corresponding path program 47 times [2022-03-20 16:47:05,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:47:05,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1731464063] [2022-03-20 16:47:05,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:47:05,982 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:47:05,982 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:47:05,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1007212713, now seen corresponding path program 48 times [2022-03-20 16:47:05,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:47:05,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921166921] [2022-03-20 16:47:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:47:05,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:47:05,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:47:05,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96415918] [2022-03-20 16:47:05,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:47:05,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:47:05,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:47:05,991 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:47:05,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 16:47:07,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 16:47:07,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:47:07,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-20 16:47:07,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:47:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-03-20 16:47:08,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:47:08,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:47:08,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921166921] [2022-03-20 16:47:08,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:47:08,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96415918] [2022-03-20 16:47:08,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96415918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:47:08,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:47:08,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-03-20 16:47:08,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:47:08,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1731464063] [2022-03-20 16:47:08,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1731464063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:47:08,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:47:08,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 16:47:08,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136959394] [2022-03-20 16:47:08,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:47:08,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 16:47:08,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:47:08,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 16:47:08,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 16:47:08,296 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-20 16:47:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:47:08,992 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2022-03-20 16:47:08,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 16:47:08,992 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) Word has length 191 [2022-03-20 16:47:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:47:08,993 INFO L225 Difference]: With dead ends: 108 [2022-03-20 16:47:08,993 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 16:47:08,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 16:47:08,994 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 2 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 16:47:08,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1969 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 16:47:08,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 16:47:09,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 16:47:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 30 states have call successors, (30), 6 states have call predecessors, (30), 4 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 16:47:09,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-03-20 16:47:09,005 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 191 [2022-03-20 16:47:09,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:47:09,005 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-03-20 16:47:09,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-20 16:47:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-03-20 16:47:09,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-20 16:47:09,006 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:47:09,006 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:47:09,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 16:47:09,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 16:47:09,206 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:47:09,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:47:09,206 INFO L85 PathProgramCache]: Analyzing trace with hash 447117384, now seen corresponding path program 49 times [2022-03-20 16:47:09,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:47:09,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [959435857] [2022-03-20 16:47:09,208 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:47:09,208 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:47:09,208 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:47:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash 447117384, now seen corresponding path program 50 times [2022-03-20 16:47:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:47:09,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750442668] [2022-03-20 16:47:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:47:09,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:47:09,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:47:09,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36202276] [2022-03-20 16:47:09,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:47:09,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:47:09,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:47:09,216 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:47:09,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 16:47:10,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:47:10,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:47:10,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-20 16:47:10,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:47:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-20 16:47:11,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:47:11,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:47:11,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750442668] [2022-03-20 16:47:11,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:47:11,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36202276] [2022-03-20 16:47:11,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36202276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:47:11,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:47:11,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-03-20 16:47:11,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:47:11,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [959435857] [2022-03-20 16:47:11,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [959435857] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:47:11,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:47:11,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 16:47:11,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516584215] [2022-03-20 16:47:11,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:47:11,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 16:47:11,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:47:11,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 16:47:11,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 16:47:11,389 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-20 16:47:12,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:47:12,125 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2022-03-20 16:47:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 16:47:12,125 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) Word has length 198 [2022-03-20 16:47:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:47:12,126 INFO L225 Difference]: With dead ends: 111 [2022-03-20 16:47:12,126 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 16:47:12,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 16:47:12,127 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 16:47:12,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2097 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 16:47:12,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 16:47:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-03-20 16:47:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 31 states have call successors, (31), 6 states have call predecessors, (31), 4 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 16:47:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2022-03-20 16:47:12,137 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 198 [2022-03-20 16:47:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:47:12,138 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2022-03-20 16:47:12,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-20 16:47:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2022-03-20 16:47:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-20 16:47:12,139 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:47:12,139 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:47:12,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 16:47:12,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 16:47:12,345 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:47:12,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:47:12,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1629673417, now seen corresponding path program 51 times [2022-03-20 16:47:12,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:47:12,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1184780006] [2022-03-20 16:47:12,346 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:47:12,347 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:47:12,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:47:12,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1629673417, now seen corresponding path program 52 times [2022-03-20 16:47:12,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:47:12,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144728328] [2022-03-20 16:47:12,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:47:12,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:47:12,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:47:12,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892394283] [2022-03-20 16:47:12,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:47:12,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:47:12,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:47:12,354 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:47:12,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 16:47:12,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:47:12,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:47:12,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-20 16:47:12,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:47:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-03-20 16:47:13,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:47:13,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:47:13,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144728328] [2022-03-20 16:47:13,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:47:13,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892394283] [2022-03-20 16:47:13,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892394283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:47:13,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:47:13,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-03-20 16:47:13,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:47:13,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1184780006] [2022-03-20 16:47:13,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1184780006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:47:13,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:47:13,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 16:47:13,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143237113] [2022-03-20 16:47:13,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:47:13,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 16:47:13,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:47:13,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 16:47:13,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 16:47:13,864 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-20 16:47:14,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:47:14,652 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2022-03-20 16:47:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 16:47:14,653 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) Word has length 205 [2022-03-20 16:47:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:47:14,653 INFO L225 Difference]: With dead ends: 114 [2022-03-20 16:47:14,654 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 16:47:14,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 16:47:14,654 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 2 mSDsluCounter, 2129 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 16:47:14,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2229 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 16:47:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 16:47:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-20 16:47:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 32 states have call successors, (32), 6 states have call predecessors, (32), 4 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 16:47:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-03-20 16:47:14,670 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 205 [2022-03-20 16:47:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:47:14,670 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-03-20 16:47:14,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-20 16:47:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-03-20 16:47:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-20 16:47:14,672 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:47:14,672 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:47:14,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 16:47:14,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 16:47:14,879 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:47:14,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:47:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash -12241624, now seen corresponding path program 53 times [2022-03-20 16:47:14,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:47:14,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [68354485] [2022-03-20 16:47:14,880 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:47:14,881 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:47:14,881 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:47:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash -12241624, now seen corresponding path program 54 times [2022-03-20 16:47:14,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:47:14,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507166275] [2022-03-20 16:47:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:47:14,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:47:14,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:47:14,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734226488] [2022-03-20 16:47:14,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:47:14,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:47:14,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:47:14,888 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:47:14,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 16:48:06,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-20 16:48:06,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:48:06,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 133 conjunts are in the unsatisfiable core [2022-03-20 16:48:06,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:48:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 278 proven. 1137 refuted. 0 times theorem prover too weak. 1287 trivial. 0 not checked. [2022-03-20 16:48:06,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:48:40,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:48:40,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507166275] [2022-03-20 16:48:40,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:48:40,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734226488] [2022-03-20 16:48:40,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734226488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:48:40,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:48:40,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-03-20 16:48:40,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:48:40,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [68354485] [2022-03-20 16:48:40,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [68354485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:48:40,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:48:40,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 16:48:40,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84964585] [2022-03-20 16:48:40,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:48:40,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 16:48:40,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:48:40,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 16:48:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1722, Unknown=6, NotChecked=0, Total=1892 [2022-03-20 16:48:40,750 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 38 states, 37 states have (on average 1.945945945945946) internal successors, (72), 34 states have internal predecessors, (72), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-20 16:48:41,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:48:41,863 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2022-03-20 16:48:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 16:48:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.945945945945946) internal successors, (72), 34 states have internal predecessors, (72), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) Word has length 212 [2022-03-20 16:48:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:48:41,864 INFO L225 Difference]: With dead ends: 121 [2022-03-20 16:48:41,864 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 16:48:41,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=185, Invalid=1971, Unknown=6, NotChecked=0, Total=2162 [2022-03-20 16:48:41,865 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 13 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 2162 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 16:48:41,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2328 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2162 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 16:48:41,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 16:48:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-03-20 16:48:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 33 states have call successors, (33), 7 states have call predecessors, (33), 5 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 16:48:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions. [2022-03-20 16:48:41,879 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 212 [2022-03-20 16:48:41,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:48:41,879 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions. [2022-03-20 16:48:41,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.945945945945946) internal successors, (72), 34 states have internal predecessors, (72), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-20 16:48:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions. [2022-03-20 16:48:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-03-20 16:48:41,880 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:48:41,880 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:48:41,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 16:48:42,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:48:42,080 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:48:42,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:48:42,081 INFO L85 PathProgramCache]: Analyzing trace with hash -255861015, now seen corresponding path program 55 times [2022-03-20 16:48:42,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:48:42,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [187402498] [2022-03-20 16:48:42,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:48:42,082 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:48:42,083 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:48:42,083 INFO L85 PathProgramCache]: Analyzing trace with hash -255861015, now seen corresponding path program 56 times [2022-03-20 16:48:42,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:48:42,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215182844] [2022-03-20 16:48:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:48:42,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:48:42,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:48:42,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938626751] [2022-03-20 16:48:42,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:48:42,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:48:42,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:48:42,090 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:48:42,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 16:48:43,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:48:43,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:48:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 139 conjunts are in the unsatisfiable core [2022-03-20 16:48:43,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:48:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 280 proven. 1230 refuted. 0 times theorem prover too weak. 1390 trivial. 0 not checked. [2022-03-20 16:48:44,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:48:48,389 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse1 (* 13 c_main_~y~0 c_main_~y~0)) (.cse2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (not (<= (div (+ .cse0 .cse1 4 .cse2) 4) (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))))) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse3 (+ c_main_~y~0 1))) (= (* .cse3 .cse3) (* main_~k~0 .cse3))))) (not (= 0 (mod (+ .cse0 .cse1 .cse2) 4))))) is different from false [2022-03-20 16:48:50,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:48:50,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215182844] [2022-03-20 16:48:50,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:48:50,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938626751] [2022-03-20 16:48:50,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938626751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:48:50,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:48:50,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-03-20 16:48:50,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:48:50,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [187402498] [2022-03-20 16:48:50,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [187402498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:48:50,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:48:50,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 16:48:50,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430252456] [2022-03-20 16:48:50,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:48:50,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 16:48:50,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:48:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 16:48:50,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1704, Unknown=1, NotChecked=82, Total=1892 [2022-03-20 16:48:50,416 INFO L87 Difference]: Start difference. First operand 116 states and 142 transitions. Second operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 35 states have internal predecessors, (74), 31 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-20 16:48:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:48:51,663 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2022-03-20 16:48:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 16:48:51,664 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 35 states have internal predecessors, (74), 31 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 219 [2022-03-20 16:48:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:48:51,664 INFO L225 Difference]: With dead ends: 124 [2022-03-20 16:48:51,665 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 16:48:51,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=126, Invalid=1947, Unknown=1, NotChecked=88, Total=2162 [2022-03-20 16:48:51,665 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 7 mSDsluCounter, 2403 mSDsCounter, 0 mSdLazyCounter, 2358 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2477 SdHoareTripleChecker+Invalid, 2360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 16:48:51,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2477 Invalid, 2360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2358 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 16:48:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 16:48:51,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-20 16:48:51,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 34 states have call successors, (34), 7 states have call predecessors, (34), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 16:48:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 146 transitions. [2022-03-20 16:48:51,687 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 146 transitions. Word has length 219 [2022-03-20 16:48:51,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:48:51,687 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 146 transitions. [2022-03-20 16:48:51,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 35 states have internal predecessors, (74), 31 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-20 16:48:51,687 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 146 transitions. [2022-03-20 16:48:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-03-20 16:48:51,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:48:51,688 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:48:51,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-20 16:48:51,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 16:48:51,894 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:48:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:48:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash 963111432, now seen corresponding path program 57 times [2022-03-20 16:48:51,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:48:51,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1485061190] [2022-03-20 16:48:51,896 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:48:51,896 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:48:51,896 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:48:51,896 INFO L85 PathProgramCache]: Analyzing trace with hash 963111432, now seen corresponding path program 58 times [2022-03-20 16:48:51,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:48:51,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709941300] [2022-03-20 16:48:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:48:51,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:48:51,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:48:51,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545473467] [2022-03-20 16:48:51,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:48:51,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:48:51,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:48:51,910 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:48:51,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 16:48:52,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:48:52,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:48:52,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 124 conjunts are in the unsatisfiable core [2022-03-20 16:48:52,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:48:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-03-20 16:48:53,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:48:53,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:48:53,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709941300] [2022-03-20 16:48:53,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:48:53,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545473467] [2022-03-20 16:48:53,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545473467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:48:53,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:48:53,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-03-20 16:48:53,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:48:53,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1485061190] [2022-03-20 16:48:53,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1485061190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:48:53,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:48:53,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 16:48:53,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993160554] [2022-03-20 16:48:53,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:48:53,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 16:48:53,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:48:53,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 16:48:53,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 16:48:53,836 INFO L87 Difference]: Start difference. First operand 119 states and 146 transitions. Second operand has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-20 16:48:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:48:54,952 INFO L93 Difference]: Finished difference Result 127 states and 155 transitions. [2022-03-20 16:48:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 16:48:54,952 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) Word has length 226 [2022-03-20 16:48:54,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:48:54,953 INFO L225 Difference]: With dead ends: 127 [2022-03-20 16:48:54,953 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 16:48:54,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 16:48:54,954 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 2 mSDsluCounter, 2540 mSDsCounter, 0 mSdLazyCounter, 2053 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 16:48:54,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2649 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2053 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 16:48:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 16:48:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-03-20 16:48:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 35 states have call successors, (35), 7 states have call predecessors, (35), 5 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 16:48:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2022-03-20 16:48:54,967 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 226 [2022-03-20 16:48:54,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:48:54,967 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2022-03-20 16:48:54,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-20 16:48:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2022-03-20 16:48:54,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-20 16:48:54,968 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:48:54,968 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:48:54,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 16:48:55,174 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:48:55,174 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:48:55,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:48:55,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1527648759, now seen corresponding path program 59 times [2022-03-20 16:48:55,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:48:55,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1892938469] [2022-03-20 16:48:55,177 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:48:55,177 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:48:55,177 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:48:55,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1527648759, now seen corresponding path program 60 times [2022-03-20 16:48:55,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:48:55,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943311947] [2022-03-20 16:48:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:48:55,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:48:55,189 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:48:55,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134278817] [2022-03-20 16:48:55,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:48:55,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:48:55,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:48:55,190 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:48:55,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 16:49:05,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-20 16:49:05,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:49:05,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 129 conjunts are in the unsatisfiable core [2022-03-20 16:49:05,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:49:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 62 proven. 1395 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-20 16:49:06,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:49:09,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:49:09,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943311947] [2022-03-20 16:49:09,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:49:09,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134278817] [2022-03-20 16:49:09,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134278817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:49:09,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:49:09,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-03-20 16:49:09,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:49:09,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1892938469] [2022-03-20 16:49:09,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1892938469] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:49:09,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:49:09,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 16:49:09,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582591292] [2022-03-20 16:49:09,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:49:09,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 16:49:09,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:49:09,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 16:49:09,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=3516, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 16:49:09,789 INFO L87 Difference]: Start difference. First operand 122 states and 150 transitions. Second operand has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-20 16:49:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:49:11,015 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2022-03-20 16:49:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 16:49:11,016 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) Word has length 233 [2022-03-20 16:49:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:49:11,017 INFO L225 Difference]: With dead ends: 130 [2022-03-20 16:49:11,017 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 16:49:11,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 381 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1050, Invalid=3780, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 16:49:11,018 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 2 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2797 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 16:49:11,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2797 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 16:49:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 16:49:11,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-03-20 16:49:11,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 36 states have call successors, (36), 7 states have call predecessors, (36), 5 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 16:49:11,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2022-03-20 16:49:11,031 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 233 [2022-03-20 16:49:11,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:49:11,032 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2022-03-20 16:49:11,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-20 16:49:11,032 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2022-03-20 16:49:11,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-03-20 16:49:11,032 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:49:11,033 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:49:11,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 16:49:11,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:49:11,233 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:49:11,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:49:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash -155412760, now seen corresponding path program 61 times [2022-03-20 16:49:11,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:49:11,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2043581796] [2022-03-20 16:49:11,235 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:49:11,235 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:49:11,235 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:49:11,235 INFO L85 PathProgramCache]: Analyzing trace with hash -155412760, now seen corresponding path program 62 times [2022-03-20 16:49:11,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:49:11,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094819954] [2022-03-20 16:49:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:49:11,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:49:11,242 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:49:11,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354299230] [2022-03-20 16:49:11,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:49:11,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:49:11,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:49:11,243 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:49:11,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 16:49:12,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:49:12,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:49:12,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 149 conjunts are in the unsatisfiable core [2022-03-20 16:49:12,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:49:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 322 proven. 1491 refuted. 0 times theorem prover too weak. 1723 trivial. 0 not checked. [2022-03-20 16:49:13,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:49:17,616 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse1 (* 13 c_main_~y~0 c_main_~y~0)) (.cse2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (not (<= (div (+ .cse0 .cse1 4 .cse2) 4) (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))))) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse3 (+ c_main_~y~0 1))) (= (* .cse3 .cse3) (* main_~k~0 .cse3))))) (not (= 0 (mod (+ .cse0 .cse1 .cse2) 4))))) is different from false [2022-03-20 16:49:17,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:49:17,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094819954] [2022-03-20 16:49:17,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:49:17,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354299230] [2022-03-20 16:49:17,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354299230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:49:17,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:49:17,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2022-03-20 16:49:17,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:49:17,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2043581796] [2022-03-20 16:49:17,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2043581796] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:49:17,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:49:17,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 16:49:17,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568905420] [2022-03-20 16:49:17,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:49:17,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 16:49:17,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:49:17,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 16:49:17,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2019, Unknown=1, NotChecked=90, Total=2256 [2022-03-20 16:49:17,718 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand has 42 states, 41 states have (on average 1.951219512195122) internal successors, (80), 38 states have internal predecessors, (80), 34 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-20 16:49:19,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:49:19,303 INFO L93 Difference]: Finished difference Result 137 states and 166 transitions. [2022-03-20 16:49:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 16:49:19,304 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.951219512195122) internal successors, (80), 38 states have internal predecessors, (80), 34 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) Word has length 240 [2022-03-20 16:49:19,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:49:19,304 INFO L225 Difference]: With dead ends: 137 [2022-03-20 16:49:19,304 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 16:49:19,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=167, Invalid=2286, Unknown=1, NotChecked=96, Total=2550 [2022-03-20 16:49:19,305 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 12 mSDsluCounter, 3024 mSDsCounter, 0 mSdLazyCounter, 2962 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 2967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 16:49:19,305 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 3105 Invalid, 2967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2962 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 16:49:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 16:49:19,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-03-20 16:49:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 37 states have call successors, (37), 8 states have call predecessors, (37), 6 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 16:49:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 161 transitions. [2022-03-20 16:49:19,319 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 161 transitions. Word has length 240 [2022-03-20 16:49:19,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:49:19,320 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 161 transitions. [2022-03-20 16:49:19,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.951219512195122) internal successors, (80), 38 states have internal predecessors, (80), 34 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-20 16:49:19,320 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 161 transitions. [2022-03-20 16:49:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-03-20 16:49:19,321 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:49:19,321 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:49:19,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 16:49:19,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 16:49:19,527 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:49:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:49:19,527 INFO L85 PathProgramCache]: Analyzing trace with hash 810222889, now seen corresponding path program 63 times [2022-03-20 16:49:19,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:49:19,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [909881021] [2022-03-20 16:49:19,529 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:49:19,529 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:49:19,529 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:49:19,529 INFO L85 PathProgramCache]: Analyzing trace with hash 810222889, now seen corresponding path program 64 times [2022-03-20 16:49:19,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:49:19,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603249722] [2022-03-20 16:49:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:49:19,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:49:19,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:49:19,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917145753] [2022-03-20 16:49:19,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:49:19,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:49:19,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:49:19,537 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:49:19,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 16:49:20,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:49:20,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:49:20,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 136 conjunts are in the unsatisfiable core [2022-03-20 16:49:20,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:49:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 66 proven. 1584 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-20 16:49:21,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:49:22,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:49:22,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603249722] [2022-03-20 16:49:22,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:49:22,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917145753] [2022-03-20 16:49:22,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917145753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:49:22,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:49:22,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-03-20 16:49:22,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:49:22,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [909881021] [2022-03-20 16:49:22,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [909881021] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:49:22,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:49:22,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 16:49:22,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205133390] [2022-03-20 16:49:22,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:49:22,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 16:49:22,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:49:22,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 16:49:22,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 16:49:22,227 INFO L87 Difference]: Start difference. First operand 132 states and 161 transitions. Second operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-20 16:49:23,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:49:23,549 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2022-03-20 16:49:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 16:49:23,549 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) Word has length 247 [2022-03-20 16:49:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:49:23,550 INFO L225 Difference]: With dead ends: 140 [2022-03-20 16:49:23,550 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 16:49:23,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 16:49:23,551 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 2987 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 16:49:23,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3105 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 16:49:23,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 16:49:23,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-03-20 16:49:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 38 states have call successors, (38), 8 states have call predecessors, (38), 6 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 16:49:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 165 transitions. [2022-03-20 16:49:23,565 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 165 transitions. Word has length 247 [2022-03-20 16:49:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:49:23,566 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 165 transitions. [2022-03-20 16:49:23,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-20 16:49:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 165 transitions. [2022-03-20 16:49:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-03-20 16:49:23,567 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:49:23,567 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:49:23,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-20 16:49:23,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 16:49:23,773 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:49:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:49:23,773 INFO L85 PathProgramCache]: Analyzing trace with hash -596558904, now seen corresponding path program 65 times [2022-03-20 16:49:23,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:49:23,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [122668906] [2022-03-20 16:49:23,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:49:23,775 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:49:23,775 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:49:23,775 INFO L85 PathProgramCache]: Analyzing trace with hash -596558904, now seen corresponding path program 66 times [2022-03-20 16:49:23,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:49:23,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364457834] [2022-03-20 16:49:23,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:49:23,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:49:23,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:49:23,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850366414] [2022-03-20 16:49:23,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:49:23,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:49:23,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:49:23,783 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:49:23,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 16:49:56,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-20 16:49:56,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:49:56,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 140 conjunts are in the unsatisfiable core [2022-03-20 16:49:56,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:49:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 68 proven. 1683 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-03-20 16:49:57,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:49:58,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:49:58,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364457834] [2022-03-20 16:49:58,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:49:58,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850366414] [2022-03-20 16:49:58,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850366414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:49:58,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:49:58,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-03-20 16:49:58,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:49:58,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [122668906] [2022-03-20 16:49:58,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [122668906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:49:58,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:49:58,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 16:49:58,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208550770] [2022-03-20 16:49:58,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:49:58,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 16:49:58,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:49:58,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 16:49:58,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 16:49:58,063 INFO L87 Difference]: Start difference. First operand 135 states and 165 transitions. Second operand has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-20 16:49:59,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:49:59,455 INFO L93 Difference]: Finished difference Result 143 states and 174 transitions. [2022-03-20 16:49:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 16:49:59,455 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) Word has length 254 [2022-03-20 16:49:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:49:59,456 INFO L225 Difference]: With dead ends: 143 [2022-03-20 16:49:59,456 INFO L226 Difference]: Without dead ends: 138 [2022-03-20 16:49:59,456 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 16:49:59,456 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 2 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3265 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 16:49:59,457 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3265 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 16:49:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-20 16:49:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-03-20 16:49:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 39 states have call successors, (39), 8 states have call predecessors, (39), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 16:49:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 169 transitions. [2022-03-20 16:49:59,471 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 169 transitions. Word has length 254 [2022-03-20 16:49:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:49:59,472 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 169 transitions. [2022-03-20 16:49:59,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-20 16:49:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 169 transitions. [2022-03-20 16:49:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-03-20 16:49:59,473 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:49:59,473 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:49:59,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 16:49:59,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 16:49:59,683 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:49:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:49:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1574773833, now seen corresponding path program 67 times [2022-03-20 16:49:59,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:49:59,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1182670017] [2022-03-20 16:49:59,686 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:49:59,686 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:49:59,686 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:49:59,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1574773833, now seen corresponding path program 68 times [2022-03-20 16:49:59,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:49:59,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624817494] [2022-03-20 16:49:59,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:49:59,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:49:59,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:49:59,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859781883] [2022-03-20 16:49:59,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:49:59,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:49:59,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:49:59,694 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:49:59,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 16:50:00,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:50:00,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:50:00,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 144 conjunts are in the unsatisfiable core [2022-03-20 16:50:00,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:50:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 70 proven. 1785 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-03-20 16:50:02,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:50:02,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:50:02,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624817494] [2022-03-20 16:50:02,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:50:02,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859781883] [2022-03-20 16:50:02,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859781883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:50:02,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:50:02,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-03-20 16:50:02,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:50:02,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1182670017] [2022-03-20 16:50:02,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1182670017] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:50:02,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:50:02,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 16:50:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757003507] [2022-03-20 16:50:02,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:50:02,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 16:50:02,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:50:02,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 16:50:02,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 16:50:02,338 INFO L87 Difference]: Start difference. First operand 138 states and 169 transitions. Second operand has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-20 16:50:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:50:03,781 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2022-03-20 16:50:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 16:50:03,782 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) Word has length 261 [2022-03-20 16:50:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:50:03,783 INFO L225 Difference]: With dead ends: 146 [2022-03-20 16:50:03,783 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 16:50:03,783 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 16:50:03,783 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 2 mSDsluCounter, 3305 mSDsCounter, 0 mSdLazyCounter, 2743 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3429 SdHoareTripleChecker+Invalid, 2743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 16:50:03,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3429 Invalid, 2743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2743 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 16:50:03,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 16:50:03,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-03-20 16:50:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 40 states have call successors, (40), 8 states have call predecessors, (40), 6 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 16:50:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 173 transitions. [2022-03-20 16:50:03,799 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 173 transitions. Word has length 261 [2022-03-20 16:50:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:50:03,799 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 173 transitions. [2022-03-20 16:50:03,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-20 16:50:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 173 transitions. [2022-03-20 16:50:03,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-03-20 16:50:03,800 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:50:03,801 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:50:03,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 16:50:04,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:50:04,007 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:50:04,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:50:04,008 INFO L85 PathProgramCache]: Analyzing trace with hash -416032600, now seen corresponding path program 69 times [2022-03-20 16:50:04,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:50:04,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1716438509] [2022-03-20 16:50:04,009 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:50:04,009 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:50:04,009 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:50:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash -416032600, now seen corresponding path program 70 times [2022-03-20 16:50:04,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:50:04,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581375045] [2022-03-20 16:50:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:50:04,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:50:04,018 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:50:04,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702470164] [2022-03-20 16:50:04,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:50:04,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:50:04,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:50:04,028 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:50:04,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 16:50:05,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:50:05,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:50:05,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 148 conjunts are in the unsatisfiable core [2022-03-20 16:50:05,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:50:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 72 proven. 1890 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-03-20 16:50:06,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:50:06,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:50:06,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581375045] [2022-03-20 16:50:06,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:50:06,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702470164] [2022-03-20 16:50:06,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702470164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:50:06,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:50:06,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-03-20 16:50:06,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:50:06,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1716438509] [2022-03-20 16:50:06,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1716438509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:50:06,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:50:06,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 16:50:06,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134095815] [2022-03-20 16:50:06,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:50:06,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 16:50:06,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:50:06,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 16:50:06,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 16:50:06,557 INFO L87 Difference]: Start difference. First operand 141 states and 173 transitions. Second operand has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-20 16:50:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:50:08,088 INFO L93 Difference]: Finished difference Result 149 states and 182 transitions. [2022-03-20 16:50:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 16:50:08,088 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) Word has length 268 [2022-03-20 16:50:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:50:08,089 INFO L225 Difference]: With dead ends: 149 [2022-03-20 16:50:08,089 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 16:50:08,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 16:50:08,090 INFO L913 BasicCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 16:50:08,090 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3597 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 16:50:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 16:50:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-03-20 16:50:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 41 states have call successors, (41), 8 states have call predecessors, (41), 6 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-20 16:50:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 177 transitions. [2022-03-20 16:50:08,106 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 177 transitions. Word has length 268 [2022-03-20 16:50:08,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:50:08,106 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 177 transitions. [2022-03-20 16:50:08,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-20 16:50:08,106 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 177 transitions. [2022-03-20 16:50:08,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-20 16:50:08,107 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:50:08,107 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:50:08,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 16:50:08,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 16:50:08,314 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:50:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:50:08,314 INFO L85 PathProgramCache]: Analyzing trace with hash 825903977, now seen corresponding path program 71 times [2022-03-20 16:50:08,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:50:08,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1519973290] [2022-03-20 16:50:08,316 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:50:08,316 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:50:08,316 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:50:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash 825903977, now seen corresponding path program 72 times [2022-03-20 16:50:08,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:50:08,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226717983] [2022-03-20 16:50:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:50:08,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:50:08,323 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:50:08,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717299924] [2022-03-20 16:50:08,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:50:08,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:50:08,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:50:08,324 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:50:08,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 16:50:27,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-20 16:50:27,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:50:27,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 153 conjunts are in the unsatisfiable core [2022-03-20 16:50:27,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:50:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4736 backedges. 74 proven. 1998 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-03-20 16:50:28,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:50:33,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:50:33,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226717983] [2022-03-20 16:50:33,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:50:33,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717299924] [2022-03-20 16:50:33,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717299924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:50:33,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:50:33,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2022-03-20 16:50:33,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:50:33,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1519973290] [2022-03-20 16:50:33,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1519973290] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:50:33,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:50:33,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 16:50:33,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558594917] [2022-03-20 16:50:33,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:50:33,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 16:50:33,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:50:33,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 16:50:33,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=4860, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 16:50:33,633 INFO L87 Difference]: Start difference. First operand 144 states and 177 transitions. Second operand has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-20 16:50:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:50:35,366 INFO L93 Difference]: Finished difference Result 152 states and 186 transitions. [2022-03-20 16:50:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 16:50:35,366 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) Word has length 275 [2022-03-20 16:50:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:50:35,367 INFO L225 Difference]: With dead ends: 152 [2022-03-20 16:50:35,367 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 16:50:35,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 453 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1470, Invalid=5172, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 16:50:35,368 INFO L913 BasicCegarLoop]: 130 mSDtfsCounter, 2 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 3047 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3769 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 16:50:35,368 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3769 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3047 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 16:50:35,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 16:50:35,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-20 16:50:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 42 states have call successors, (42), 8 states have call predecessors, (42), 6 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 16:50:35,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 181 transitions. [2022-03-20 16:50:35,384 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 181 transitions. Word has length 275 [2022-03-20 16:50:35,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:50:35,384 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 181 transitions. [2022-03-20 16:50:35,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-20 16:50:35,384 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 181 transitions. [2022-03-20 16:50:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-03-20 16:50:35,385 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:50:35,385 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:50:35,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 16:50:35,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 16:50:35,600 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:50:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:50:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1261596040, now seen corresponding path program 73 times [2022-03-20 16:50:35,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:50:35,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1010584047] [2022-03-20 16:50:35,603 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:50:35,603 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:50:35,603 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:50:35,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1261596040, now seen corresponding path program 74 times [2022-03-20 16:50:35,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:50:35,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391924793] [2022-03-20 16:50:35,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:50:35,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:50:35,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:50:35,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942034757] [2022-03-20 16:50:35,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:50:35,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:50:35,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:50:35,611 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:50:35,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 16:50:37,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:50:37,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:50:37,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 156 conjunts are in the unsatisfiable core [2022-03-20 16:50:37,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:50:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 76 proven. 2109 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2022-03-20 16:50:38,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:50:38,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:50:38,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391924793] [2022-03-20 16:50:38,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:50:38,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942034757] [2022-03-20 16:50:38,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942034757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:50:38,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:50:38,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2022-03-20 16:50:38,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:50:38,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1010584047] [2022-03-20 16:50:38,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1010584047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:50:38,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:50:38,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 16:50:38,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457262597] [2022-03-20 16:50:38,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:50:38,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 16:50:38,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:50:38,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 16:50:38,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 16:50:38,487 INFO L87 Difference]: Start difference. First operand 147 states and 181 transitions. Second operand has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-20 16:50:40,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:50:40,193 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2022-03-20 16:50:40,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 16:50:40,193 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) Word has length 282 [2022-03-20 16:50:40,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:50:40,194 INFO L225 Difference]: With dead ends: 155 [2022-03-20 16:50:40,194 INFO L226 Difference]: Without dead ends: 150 [2022-03-20 16:50:40,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=2114, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 16:50:40,195 INFO L913 BasicCegarLoop]: 133 mSDtfsCounter, 2 mSDsluCounter, 3812 mSDsCounter, 0 mSdLazyCounter, 3205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3945 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 16:50:40,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3945 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3205 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 16:50:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-20 16:50:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-03-20 16:50:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 43 states have call successors, (43), 8 states have call predecessors, (43), 6 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 16:50:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 185 transitions. [2022-03-20 16:50:40,219 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 185 transitions. Word has length 282 [2022-03-20 16:50:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:50:40,219 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 185 transitions. [2022-03-20 16:50:40,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-20 16:50:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 185 transitions. [2022-03-20 16:50:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-03-20 16:50:40,220 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:50:40,220 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:50:40,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 16:50:40,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 16:50:40,427 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:50:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:50:40,428 INFO L85 PathProgramCache]: Analyzing trace with hash 108296841, now seen corresponding path program 75 times [2022-03-20 16:50:40,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:50:40,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [783353520] [2022-03-20 16:50:40,429 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:50:40,429 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:50:40,429 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:50:40,429 INFO L85 PathProgramCache]: Analyzing trace with hash 108296841, now seen corresponding path program 76 times [2022-03-20 16:50:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:50:40,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470798607] [2022-03-20 16:50:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:50:40,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:50:40,436 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:50:40,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969092319] [2022-03-20 16:50:40,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 16:50:40,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:50:40,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:50:40,438 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:50:40,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 16:50:43,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 16:50:43,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:50:43,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 160 conjunts are in the unsatisfiable core [2022-03-20 16:50:43,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:50:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5265 backedges. 78 proven. 2223 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2022-03-20 16:50:44,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:50:45,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:50:45,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470798607] [2022-03-20 16:50:45,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:50:45,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969092319] [2022-03-20 16:50:45,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969092319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 16:50:45,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 16:50:45,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2022-03-20 16:50:45,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:50:45,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [783353520] [2022-03-20 16:50:45,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [783353520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:50:45,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:50:45,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 16:50:45,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542296528] [2022-03-20 16:50:45,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:50:45,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 16:50:45,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:50:45,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 16:50:45,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 16:50:45,145 INFO L87 Difference]: Start difference. First operand 150 states and 185 transitions. Second operand has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-20 16:50:46,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:50:46,991 INFO L93 Difference]: Finished difference Result 158 states and 194 transitions. [2022-03-20 16:50:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 16:50:46,992 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) Word has length 289 [2022-03-20 16:50:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:50:46,993 INFO L225 Difference]: With dead ends: 158 [2022-03-20 16:50:46,993 INFO L226 Difference]: Without dead ends: 153 [2022-03-20 16:50:46,993 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 16:50:46,993 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 2 mSDsluCounter, 3989 mSDsCounter, 0 mSdLazyCounter, 3367 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4125 SdHoareTripleChecker+Invalid, 3367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 16:50:46,993 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4125 Invalid, 3367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3367 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 16:50:46,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-20 16:50:47,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-20 16:50:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 44 states have call successors, (44), 8 states have call predecessors, (44), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 16:50:47,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 189 transitions. [2022-03-20 16:50:47,010 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 189 transitions. Word has length 289 [2022-03-20 16:50:47,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:50:47,011 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 189 transitions. [2022-03-20 16:50:47,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-20 16:50:47,011 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 189 transitions. [2022-03-20 16:50:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-03-20 16:50:47,012 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:50:47,012 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:50:47,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 16:50:47,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-20 16:50:47,221 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:50:47,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:50:47,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1411054184, now seen corresponding path program 77 times [2022-03-20 16:50:47,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:50:47,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [763392316] [2022-03-20 16:50:47,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:50:47,223 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:50:47,223 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:50:47,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1411054184, now seen corresponding path program 78 times [2022-03-20 16:50:47,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:50:47,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964787518] [2022-03-20 16:50:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:50:47,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:50:47,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:50:47,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092280653] [2022-03-20 16:50:47,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 16:50:47,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:50:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:50:47,231 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:50:47,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process