/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 23:06:54,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 23:06:54,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 23:06:54,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 23:06:54,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 23:06:54,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 23:06:54,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 23:06:54,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 23:06:54,468 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 23:06:54,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 23:06:54,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 23:06:54,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 23:06:54,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 23:06:54,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 23:06:54,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 23:06:54,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 23:06:54,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 23:06:54,472 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 23:06:54,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 23:06:54,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 23:06:54,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 23:06:54,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 23:06:54,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 23:06:54,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 23:06:54,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 23:06:54,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 23:06:54,473 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 23:06:54,473 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 23:06:54,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 23:06:54,473 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 23:06:54,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 23:06:54,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 23:06:54,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 23:06:54,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 23:06:54,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 23:06:54,644 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 23:06:54,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound100.c [2022-03-20 23:06:54,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e313a2ab1/5dff177434364a568334c7068b8cdf29/FLAG3833759cc [2022-03-20 23:06:55,046 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 23:06:55,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound100.c [2022-03-20 23:06:55,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e313a2ab1/5dff177434364a568334c7068b8cdf29/FLAG3833759cc [2022-03-20 23:06:55,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e313a2ab1/5dff177434364a568334c7068b8cdf29 [2022-03-20 23:06:55,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 23:06:55,060 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 23:06:55,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 23:06:55,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 23:06:55,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 23:06:55,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:06:55" (1/1) ... [2022-03-20 23:06:55,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd56069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:06:55, skipping insertion in model container [2022-03-20 23:06:55,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:06:55" (1/1) ... [2022-03-20 23:06:55,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 23:06:55,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 23:06:55,202 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/ps5-ll_valuebound100.c[458,471] [2022-03-20 23:06:55,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 23:06:55,223 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 23:06:55,230 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/ps5-ll_valuebound100.c[458,471] [2022-03-20 23:06:55,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 23:06:55,242 INFO L208 MainTranslator]: Completed translation [2022-03-20 23:06:55,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:06:55 WrapperNode [2022-03-20 23:06:55,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 23:06:55,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 23:06:55,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 23:06:55,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 23:06:55,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:06:55" (1/1) ... [2022-03-20 23:06:55,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:06:55" (1/1) ... [2022-03-20 23:06:55,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:06:55" (1/1) ... [2022-03-20 23:06:55,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:06:55" (1/1) ... [2022-03-20 23:06:55,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:06:55" (1/1) ... [2022-03-20 23:06:55,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:06:55" (1/1) ... [2022-03-20 23:06:55,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:06:55" (1/1) ... [2022-03-20 23:06:55,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 23:06:55,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 23:06:55,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 23:06:55,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 23:06:55,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:06:55" (1/1) ... [2022-03-20 23:06:55,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 23:06:55,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:06:55,285 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 23:06:55,296 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 23:06:55,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 23:06:55,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 23:06:55,316 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 23:06:55,316 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 23:06:55,316 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 23:06:55,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 23:06:55,316 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 23:06:55,316 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 23:06:55,316 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 23:06:55,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 23:06:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-20 23:06:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 23:06:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 23:06:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 23:06:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 23:06:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 23:06:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 23:06:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 23:06:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 23:06:55,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 23:06:55,359 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 23:06:55,360 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 23:06:55,457 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 23:06:55,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 23:06:55,461 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 23:06:55,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:06:55 BoogieIcfgContainer [2022-03-20 23:06:55,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 23:06:55,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 23:06:55,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 23:06:55,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 23:06:55,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 11:06:55" (1/3) ... [2022-03-20 23:06:55,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323e1797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:06:55, skipping insertion in model container [2022-03-20 23:06:55,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:06:55" (2/3) ... [2022-03-20 23:06:55,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323e1797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:06:55, skipping insertion in model container [2022-03-20 23:06:55,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:06:55" (3/3) ... [2022-03-20 23:06:55,488 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound100.c [2022-03-20 23:06:55,491 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 23:06:55,491 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 23:06:55,536 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 23:06:55,542 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 23:06:55,542 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 23:06:55,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 23:06:55,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 23:06:55,570 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:06:55,570 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:06:55,571 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:06:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:06:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2022-03-20 23:06:55,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:06:55,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1110617916] [2022-03-20 23:06:55,589 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:06:55,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 2 times [2022-03-20 23:06:55,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:06:55,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450719340] [2022-03-20 23:06:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:06:55,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:06:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:06:55,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:06:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:06:55,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:06:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:06:55,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 23:06:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:06:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 23:06:55,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:06:55,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450719340] [2022-03-20 23:06:55,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450719340] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:06:55,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:06:55,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 23:06:55,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:06:55,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1110617916] [2022-03-20 23:06:55,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1110617916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:06:55,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:06:55,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 23:06:55,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235568777] [2022-03-20 23:06:55,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:06:55,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 23:06:55,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:06:55,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 23:06:55,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 23:06:55,812 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 23:06:55,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:06:55,883 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-03-20 23:06:55,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 23:06:55,886 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 23:06:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:06:55,895 INFO L225 Difference]: With dead ends: 51 [2022-03-20 23:06:55,895 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 23:06:55,901 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 23:06:55,905 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 23:06:55,906 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 23:06:55,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 23:06:55,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-20 23:06:55,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 23:06:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-20 23:06:55,952 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-03-20 23:06:55,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:06:55,952 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-20 23:06:55,952 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 23:06:55,953 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-20 23:06:55,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 23:06:55,954 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:06:55,954 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:06:55,956 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 23:06:55,956 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:06:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:06:55,958 INFO L85 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2022-03-20 23:06:55,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:06:55,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236660203] [2022-03-20 23:06:55,959 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:06:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 2 times [2022-03-20 23:06:55,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:06:55,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119326896] [2022-03-20 23:06:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:06:55,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:06:55,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:06:55,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569195679] [2022-03-20 23:06:55,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 23:06:55,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:06:55,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:06:55,996 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 23:06:55,997 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 23:06:56,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 23:06:56,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:06:56,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 23:06:56,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:06:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 23:06:56,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 23:06:56,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:06:56,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119326896] [2022-03-20 23:06:56,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 23:06:56,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569195679] [2022-03-20 23:06:56,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569195679] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:06:56,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:06:56,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 23:06:56,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:06:56,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236660203] [2022-03-20 23:06:56,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236660203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:06:56,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:06:56,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 23:06:56,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616092012] [2022-03-20 23:06:56,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:06:56,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 23:06:56,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:06:56,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 23:06:56,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 23:06:56,164 INFO L87 Difference]: Start difference. First operand 24 states and 27 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 23:06:56,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:06:56,210 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-03-20 23:06:56,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 23:06:56,211 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 23:06:56,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:06:56,212 INFO L225 Difference]: With dead ends: 35 [2022-03-20 23:06:56,212 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 23:06:56,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 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 23:06:56,214 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 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 23:06:56,217 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 23:06:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 23:06:56,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 23:06:56,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 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 23:06:56,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-20 23:06:56,227 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-03-20 23:06:56,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:06:56,227 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-20 23:06:56,227 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 23:06:56,227 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-20 23:06:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 23:06:56,228 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:06:56,228 INFO L499 BasicCegarLoop]: trace histogram [2, 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 23:06:56,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 23:06:56,435 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 23:06:56,435 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:06:56,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:06:56,436 INFO L85 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2022-03-20 23:06:56,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:06:56,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1947688897] [2022-03-20 23:06:56,437 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:06:56,437 INFO L85 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 2 times [2022-03-20 23:06:56,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:06:56,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653216384] [2022-03-20 23:06:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:06:56,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:06:56,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:06:56,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786732945] [2022-03-20 23:06:56,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 23:06:56,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:06:56,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:06:56,447 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 23:06:56,471 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 23:06:56,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 23:06:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:06:56,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 23:06:56,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:06:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 23:06:56,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 23:06:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 23:06:56,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:06:56,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653216384] [2022-03-20 23:06:56,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 23:06:56,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786732945] [2022-03-20 23:06:56,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786732945] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 23:06:56,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 23:06:56,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 23:06:56,898 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:06:56,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1947688897] [2022-03-20 23:06:56,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1947688897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:06:56,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:06:56,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 23:06:56,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754198313] [2022-03-20 23:06:56,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:06:56,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 23:06:56,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:06:56,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 23:06:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 23:06:56,902 INFO L87 Difference]: Start difference. First operand 31 states and 34 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 23:06:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:06:56,946 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-03-20 23:06:56,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 23:06:56,946 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-03-20 23:06:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:06:56,948 INFO L225 Difference]: With dead ends: 37 [2022-03-20 23:06:56,948 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 23:06:56,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 23:06:56,958 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 23:06:56,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 23:06:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 23:06:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 23:06:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 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 23:06:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-03-20 23:06:56,969 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-03-20 23:06:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:06:56,969 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-03-20 23:06:56,970 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 23:06:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-03-20 23:06:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 23:06:56,970 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:06:56,971 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:06:56,997 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 23:06:57,187 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 23:06:57,188 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:06:57,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:06:57,188 INFO L85 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2022-03-20 23:06:57,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:06:57,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [844571916] [2022-03-20 23:06:57,189 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:06:57,189 INFO L85 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 2 times [2022-03-20 23:06:57,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:06:57,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429662662] [2022-03-20 23:06:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:06:57,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:06:57,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:06:57,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822145694] [2022-03-20 23:06:57,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 23:06:57,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:06:57,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:06:57,201 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 23:06:57,202 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 23:06:57,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 23:06:57,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:06:57,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 23:06:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:06:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 23:06:57,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 23:06:57,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:06:57,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429662662] [2022-03-20 23:06:57,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 23:06:57,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822145694] [2022-03-20 23:06:57,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822145694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 23:06:57,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 23:06:57,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 23:06:57,647 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:06:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [844571916] [2022-03-20 23:06:57,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [844571916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:06:57,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:06:57,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 23:06:57,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94957309] [2022-03-20 23:06:57,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:06:57,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 23:06:57,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:06:57,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 23:06:57,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:06:57,649 INFO L87 Difference]: Start difference. First operand 33 states and 35 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 23:06:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:06:57,718 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-20 23:06:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 23:06:57,718 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-03-20 23:06:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:06:57,721 INFO L225 Difference]: With dead ends: 42 [2022-03-20 23:06:57,721 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 23:06:57,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 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 23:06:57,723 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 23:06:57,724 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 23:06:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 23:06:57,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-20 23:06:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 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 23:06:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-03-20 23:06:57,738 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-03-20 23:06:57,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:06:57,738 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-03-20 23:06:57,738 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 23:06:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-03-20 23:06:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 23:06:57,740 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:06:57,740 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:06:57,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 23:06:57,951 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 23:06:57,951 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:06:57,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:06:57,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 3 times [2022-03-20 23:06:57,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:06:57,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [586919430] [2022-03-20 23:06:57,953 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:06:57,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 4 times [2022-03-20 23:06:57,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:06:57,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741950453] [2022-03-20 23:06:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:06:57,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:06:57,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:06:57,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243949559] [2022-03-20 23:06:57,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 23:06:57,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:06:57,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:06:57,962 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 23:06:57,995 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 23:06:58,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 23:06:58,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:06:58,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 23:06:58,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:06:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 23:06:58,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 23:06:58,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:06:58,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741950453] [2022-03-20 23:06:58,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 23:06:58,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243949559] [2022-03-20 23:06:58,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243949559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 23:06:58,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 23:06:58,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 23:06:58,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:06:58,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [586919430] [2022-03-20 23:06:58,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [586919430] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:06:58,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:06:58,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 23:06:58,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679448677] [2022-03-20 23:06:58,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:06:58,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 23:06:58,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:06:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 23:06:58,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 23:06:58,286 INFO L87 Difference]: Start difference. First operand 36 states and 39 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 23:06:58,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:06:58,361 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-03-20 23:06:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 23:06:58,361 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-03-20 23:06:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:06:58,362 INFO L225 Difference]: With dead ends: 45 [2022-03-20 23:06:58,362 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 23:06:58,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 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 23:06:58,363 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 23:06:58,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 195 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 23:06:58,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 23:06:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-20 23:06:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 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 23:06:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-03-20 23:06:58,369 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-03-20 23:06:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:06:58,369 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-03-20 23:06:58,369 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 23:06:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-03-20 23:06:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 23:06:58,370 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:06:58,375 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:06:58,392 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 23:06:58,592 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 23:06:58,592 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:06:58,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:06:58,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 5 times [2022-03-20 23:06:58,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:06:58,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1175556557] [2022-03-20 23:06:58,593 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:06:58,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 6 times [2022-03-20 23:06:58,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:06:58,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891532708] [2022-03-20 23:06:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:06:58,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:06:58,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:06:58,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540689913] [2022-03-20 23:06:58,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 23:06:58,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:06:58,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:06:58,603 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 23:06:58,604 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 23:06:59,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 23:06:59,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:06:59,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 23:06:59,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:06:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 23:06:59,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 23:06:59,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:06:59,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891532708] [2022-03-20 23:06:59,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 23:06:59,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540689913] [2022-03-20 23:06:59,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540689913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 23:06:59,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 23:06:59,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 23:06:59,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:06:59,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1175556557] [2022-03-20 23:06:59,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1175556557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:06:59,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:06:59,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:06:59,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179877733] [2022-03-20 23:06:59,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:06:59,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 23:06:59,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:06:59,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 23:06:59,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:06:59,494 INFO L87 Difference]: Start difference. First operand 39 states and 43 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-20 23:06:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:06:59,575 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-03-20 23:06:59,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 23:06:59,576 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-03-20 23:06:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:06:59,576 INFO L225 Difference]: With dead ends: 48 [2022-03-20 23:06:59,576 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 23:06:59,577 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 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 23:06:59,577 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 23:06:59,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 23:06:59,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 23:06:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-20 23:06:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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 23:06:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-20 23:06:59,585 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-03-20 23:06:59,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:06:59,585 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-20 23:06:59,585 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-20 23:06:59,585 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-20 23:06:59,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 23:06:59,586 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:06:59,586 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:06:59,594 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 23:06:59,794 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 23:06:59,794 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:06:59,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:06:59,795 INFO L85 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 7 times [2022-03-20 23:06:59,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:06:59,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [946736140] [2022-03-20 23:06:59,795 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:06:59,795 INFO L85 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 8 times [2022-03-20 23:06:59,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:06:59,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958684133] [2022-03-20 23:06:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:06:59,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:06:59,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:06:59,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149885013] [2022-03-20 23:06:59,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 23:06:59,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:06:59,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:06:59,803 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 23:06:59,812 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 23:07:00,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 23:07:00,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:07:00,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 23:07:00,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:07:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 23:07:00,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 23:07:00,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:07:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958684133] [2022-03-20 23:07:00,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 23:07:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149885013] [2022-03-20 23:07:00,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149885013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 23:07:00,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 23:07:00,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 23:07:00,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:07:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [946736140] [2022-03-20 23:07:00,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [946736140] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:07:00,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:07:00,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:07:00,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901233596] [2022-03-20 23:07:00,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:07:00,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 23:07:00,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:07:00,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 23:07:00,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:07:00,870 INFO L87 Difference]: Start difference. First operand 42 states and 47 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-20 23:07:00,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:07:00,959 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-03-20 23:07:00,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 23:07:00,960 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-03-20 23:07:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:07:00,960 INFO L225 Difference]: With dead ends: 51 [2022-03-20 23:07:00,960 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 23:07:00,961 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 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 23:07:00,961 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 23:07:00,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 287 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 23:07:00,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 23:07:00,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 23:07:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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 23:07:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-03-20 23:07:00,969 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-03-20 23:07:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:07:00,969 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-03-20 23:07:00,969 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-20 23:07:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-03-20 23:07:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 23:07:00,970 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:07:00,970 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:07:00,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 23:07:01,175 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 23:07:01,175 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:07:01,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:07:01,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 9 times [2022-03-20 23:07:01,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:07:01,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [313522693] [2022-03-20 23:07:01,176 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:07:01,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 10 times [2022-03-20 23:07:01,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:07:01,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394508464] [2022-03-20 23:07:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:07:01,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:07:01,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:07:01,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754196814] [2022-03-20 23:07:01,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 23:07:01,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:07:01,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:07:01,184 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 23:07:01,185 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 23:07:01,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 23:07:01,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:07:01,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 23:07:01,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:07:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 23:07:01,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 23:07:01,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:07:01,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394508464] [2022-03-20 23:07:01,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 23:07:01,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754196814] [2022-03-20 23:07:01,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754196814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 23:07:01,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 23:07:01,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 23:07:01,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:07:01,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [313522693] [2022-03-20 23:07:01,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [313522693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:07:01,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:07:01,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 23:07:01,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933850617] [2022-03-20 23:07:01,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:07:01,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 23:07:01,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:07:01,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 23:07:01,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 23:07:01,540 INFO L87 Difference]: Start difference. First operand 45 states and 51 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-20 23:07:01,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:07:01,654 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-03-20 23:07:01,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 23:07:01,655 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-03-20 23:07:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:07:01,655 INFO L225 Difference]: With dead ends: 54 [2022-03-20 23:07:01,655 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 23:07:01,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 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 23:07:01,656 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 23:07:01,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 339 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 23:07:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 23:07:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-20 23:07:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 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 23:07:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-03-20 23:07:01,662 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-03-20 23:07:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:07:01,662 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-03-20 23:07:01,663 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-20 23:07:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-03-20 23:07:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 23:07:01,663 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:07:01,663 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:07:01,689 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 23:07:01,883 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 23:07:01,883 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:07:01,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:07:01,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 11 times [2022-03-20 23:07:01,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:07:01,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045545020] [2022-03-20 23:07:01,884 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:07:01,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 12 times [2022-03-20 23:07:01,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:07:01,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149676399] [2022-03-20 23:07:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:07:01,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:07:01,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:07:01,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375457670] [2022-03-20 23:07:01,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 23:07:01,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:07:01,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:07:01,894 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 23:07:01,895 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 23:07:13,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 23:07:13,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:07:13,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 23:07:13,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:07:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 23:07:13,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 23:07:14,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:07:14,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149676399] [2022-03-20 23:07:14,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 23:07:14,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375457670] [2022-03-20 23:07:14,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375457670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 23:07:14,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 23:07:14,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 23:07:14,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:07:14,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045545020] [2022-03-20 23:07:14,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045545020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:07:14,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:07:14,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:07:14,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104788830] [2022-03-20 23:07:14,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:07:14,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:07:14,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:07:14,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:07:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-20 23:07:14,349 INFO L87 Difference]: Start difference. First operand 48 states and 55 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-20 23:07:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:07:14,499 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-03-20 23:07:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:07:14,500 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2022-03-20 23:07:14,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:07:14,501 INFO L225 Difference]: With dead ends: 57 [2022-03-20 23:07:14,501 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 23:07:14,502 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-20 23:07:14,502 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 23:07:14,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 395 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 23:07:14,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 23:07:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-20 23:07:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 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 23:07:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-03-20 23:07:14,514 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 75 [2022-03-20 23:07:14,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:07:14,514 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-03-20 23:07:14,515 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-20 23:07:14,515 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-03-20 23:07:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 23:07:14,517 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:07:14,517 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:07:14,543 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 23:07:14,727 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 23:07:14,727 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:07:14,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:07:14,728 INFO L85 PathProgramCache]: Analyzing trace with hash 615143773, now seen corresponding path program 13 times [2022-03-20 23:07:14,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:07:14,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1149317845] [2022-03-20 23:07:14,728 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:07:14,728 INFO L85 PathProgramCache]: Analyzing trace with hash 615143773, now seen corresponding path program 14 times [2022-03-20 23:07:14,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:07:14,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688641135] [2022-03-20 23:07:14,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:07:14,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:07:14,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:07:14,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146397907] [2022-03-20 23:07:14,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 23:07:14,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:07:14,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:07:14,747 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 23:07:14,748 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 23:07:23,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 23:07:23,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:07:23,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 23:07:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:07:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 23:07:23,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 23:07:23,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:07:23,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688641135] [2022-03-20 23:07:23,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 23:07:23,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146397907] [2022-03-20 23:07:23,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146397907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 23:07:23,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 23:07:23,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 23:07:23,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:07:23,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1149317845] [2022-03-20 23:07:23,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1149317845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:07:23,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:07:23,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:07:23,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630532095] [2022-03-20 23:07:23,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:07:23,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 23:07:23,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:07:23,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 23:07:23,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:07:23,407 INFO L87 Difference]: Start difference. First operand 51 states and 59 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, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-03-20 23:07:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:07:23,572 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-03-20 23:07:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 23:07:23,573 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, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2022-03-20 23:07:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:07:23,574 INFO L225 Difference]: With dead ends: 60 [2022-03-20 23:07:23,574 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 23:07:23,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 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 23:07:23,574 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 23:07:23,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 455 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 23:07:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 23:07:23,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 23:07:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 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 23:07:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-03-20 23:07:23,586 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 82 [2022-03-20 23:07:23,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:07:23,586 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-03-20 23:07:23,586 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, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-03-20 23:07:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-03-20 23:07:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 23:07:23,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:07:23,587 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:07:23,600 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 23:07:23,797 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 23:07:23,798 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:07:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:07:23,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1334355539, now seen corresponding path program 15 times [2022-03-20 23:07:23,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:07:23,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1176697546] [2022-03-20 23:07:23,799 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:07:23,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1334355539, now seen corresponding path program 16 times [2022-03-20 23:07:23,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:07:23,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048871096] [2022-03-20 23:07:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:07:23,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:07:23,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:07:23,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177376535] [2022-03-20 23:07:23,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 23:07:23,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:07:23,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:07:23,809 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 23:07:23,811 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 23:07:23,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 23:07:23,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:07:23,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 23:07:23,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:07:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 23:07:24,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 23:07:24,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:07:24,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048871096] [2022-03-20 23:07:24,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 23:07:24,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177376535] [2022-03-20 23:07:24,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177376535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 23:07:24,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 23:07:24,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 23:07:24,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:07:24,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1176697546] [2022-03-20 23:07:24,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1176697546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:07:24,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:07:24,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:07:24,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455277539] [2022-03-20 23:07:24,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:07:24,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 23:07:24,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:07:24,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 23:07:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-20 23:07:24,288 INFO L87 Difference]: Start difference. First operand 54 states and 63 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-03-20 23:07:24,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:07:24,446 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-03-20 23:07:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 23:07:24,447 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2022-03-20 23:07:24,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:07:24,447 INFO L225 Difference]: With dead ends: 63 [2022-03-20 23:07:24,447 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 23:07:24,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-20 23:07:24,448 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 23:07:24,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 519 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 23:07:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 23:07:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-20 23:07:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 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 23:07:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-03-20 23:07:24,457 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 89 [2022-03-20 23:07:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:07:24,458 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-03-20 23:07:24,458 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-03-20 23:07:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-03-20 23:07:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 23:07:24,459 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:07:24,459 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:07:24,491 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 23:07:24,673 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 23:07:24,674 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:07:24,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:07:24,674 INFO L85 PathProgramCache]: Analyzing trace with hash 711483229, now seen corresponding path program 17 times [2022-03-20 23:07:24,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:07:24,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [67725296] [2022-03-20 23:07:24,675 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:07:24,675 INFO L85 PathProgramCache]: Analyzing trace with hash 711483229, now seen corresponding path program 18 times [2022-03-20 23:07:24,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:07:24,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659816169] [2022-03-20 23:07:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:07:24,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:07:24,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:07:24,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127681967] [2022-03-20 23:07:24,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 23:07:24,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:07:24,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:07:24,683 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 23:07:24,685 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 23:07:57,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 23:07:57,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:07:57,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 23:07:57,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:07:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 22 proven. 135 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 23:07:58,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 23:07:58,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:07:58,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659816169] [2022-03-20 23:07:58,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 23:07:58,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127681967] [2022-03-20 23:07:58,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127681967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 23:07:58,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 23:07:58,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 23:07:58,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:07:58,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [67725296] [2022-03-20 23:07:58,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [67725296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:07:58,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:07:58,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:07:58,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354589637] [2022-03-20 23:07:58,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:07:58,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 23:07:58,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:07:58,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 23:07:58,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-20 23:07:58,228 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-03-20 23:07:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:07:58,412 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-03-20 23:07:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 23:07:58,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 96 [2022-03-20 23:07:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:07:58,413 INFO L225 Difference]: With dead ends: 66 [2022-03-20 23:07:58,413 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 23:07:58,413 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-20 23:07:58,413 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 2 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:07:58,414 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 587 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 23:07:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 23:07:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-03-20 23:07:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 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 23:07:58,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-03-20 23:07:58,421 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 96 [2022-03-20 23:07:58,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:07:58,421 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-03-20 23:07:58,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-03-20 23:07:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-03-20 23:07:58,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 23:07:58,425 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:07:58,425 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:07:58,439 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 23:07:58,625 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 23:07:58,625 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:07:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:07:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1610181715, now seen corresponding path program 19 times [2022-03-20 23:07:58,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:07:58,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [224946945] [2022-03-20 23:07:58,626 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:07:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1610181715, now seen corresponding path program 20 times [2022-03-20 23:07:58,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:07:58,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088500060] [2022-03-20 23:07:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:07:58,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:07:58,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:07:58,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436093107] [2022-03-20 23:07:58,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 23:07:58,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:07:58,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:07:58,639 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 23:07:58,640 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 23:10:20,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 23:10:20,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:10:20,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 23:10:20,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:10:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 23:10:20,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 23:10:21,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:10:21,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088500060] [2022-03-20 23:10:21,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 23:10:21,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436093107] [2022-03-20 23:10:21,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436093107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 23:10:21,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 23:10:21,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 23:10:21,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:10:21,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [224946945] [2022-03-20 23:10:21,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [224946945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:10:21,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:10:21,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:10:21,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107566723] [2022-03-20 23:10:21,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:10:21,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 23:10:21,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:10:21,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 23:10:21,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-03-20 23:10:21,239 INFO L87 Difference]: Start difference. First operand 60 states and 71 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-03-20 23:10:21,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:10:21,486 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-20 23:10:21,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 23:10:21,487 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 103 [2022-03-20 23:10:21,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:10:21,487 INFO L225 Difference]: With dead ends: 69 [2022-03-20 23:10:21,487 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 23:10:21,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2022-03-20 23:10:21,489 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 2 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:10:21,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 659 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 23:10:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 23:10:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-20 23:10:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 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 23:10:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-03-20 23:10:21,498 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 103 [2022-03-20 23:10:21,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:10:21,498 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-03-20 23:10:21,499 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-03-20 23:10:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-03-20 23:10:21,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 23:10:21,499 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:10:21,499 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:10:21,542 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 23:10:21,715 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 23:10:21,715 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:10:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:10:21,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1881400669, now seen corresponding path program 21 times [2022-03-20 23:10:21,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:10:21,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [783014488] [2022-03-20 23:10:21,716 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:10:21,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1881400669, now seen corresponding path program 22 times [2022-03-20 23:10:21,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:10:21,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254016678] [2022-03-20 23:10:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:10:21,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:10:21,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:10:21,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4922043] [2022-03-20 23:10:21,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 23:10:21,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:10:21,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:10:21,724 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 23:10:21,725 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 23:10:21,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 23:10:21,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:10:21,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 23:10:21,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:10:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 26 proven. 198 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 23:10:22,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 23:10:22,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:10:22,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254016678] [2022-03-20 23:10:22,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 23:10:22,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4922043] [2022-03-20 23:10:22,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4922043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 23:10:22,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 23:10:22,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 23:10:22,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:10:22,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [783014488] [2022-03-20 23:10:22,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [783014488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:10:22,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:10:22,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 23:10:22,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160637082] [2022-03-20 23:10:22,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:10:22,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 23:10:22,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:10:22,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 23:10:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-20 23:10:22,228 INFO L87 Difference]: Start difference. First operand 63 states and 75 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, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-03-20 23:10:22,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:10:22,477 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-03-20 23:10:22,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 23:10:22,478 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, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 110 [2022-03-20 23:10:22,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:10:22,478 INFO L225 Difference]: With dead ends: 72 [2022-03-20 23:10:22,478 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 23:10:22,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 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 23:10:22,479 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:10:22,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 735 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 23:10:22,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 23:10:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-03-20 23:10:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 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 23:10:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-03-20 23:10:22,487 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 110 [2022-03-20 23:10:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:10:22,487 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-03-20 23:10:22,487 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, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-03-20 23:10:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-03-20 23:10:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 23:10:22,488 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:10:22,488 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:10:22,506 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 23:10:22,703 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 23:10:22,703 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:10:22,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:10:22,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1600671149, now seen corresponding path program 23 times [2022-03-20 23:10:22,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:10:22,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [84542864] [2022-03-20 23:10:22,704 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:10:22,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1600671149, now seen corresponding path program 24 times [2022-03-20 23:10:22,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:10:22,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935649343] [2022-03-20 23:10:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:10:22,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:10:22,718 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 23:10:22,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729092276] [2022-03-20 23:10:22,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 23:10:22,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:10:22,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:10:22,725 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 23:10:22,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process