/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/egcd-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 10:17:12,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 10:17:12,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 10:17:12,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 10:17:12,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 10:17:12,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 10:17:12,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 10:17:12,370 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 10:17:12,376 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 10:17:12,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 10:17:12,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 10:17:12,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 10:17:12,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 10:17:12,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 10:17:12,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 10:17:12,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 10:17:12,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 10:17:12,378 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 10:17:12,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 10:17:12,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 10:17:12,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 10:17:12,379 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 10:17:12,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 10:17:12,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:17:12,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 10:17:12,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 10:17:12,384 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 10:17:12,384 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 10:17:12,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 10:17:12,384 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 10:17:12,385 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 10:17:12,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 10:17:12,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 10:17:12,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 10:17:12,618 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 10:17:12,619 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 10:17:12,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound2.c [2022-03-19 10:17:12,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efe8fdf5c/a2e47506522b4f6b9c5c13b1c6f0c383/FLAGb6103e80a [2022-03-19 10:17:13,025 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 10:17:13,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound2.c [2022-03-19 10:17:13,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efe8fdf5c/a2e47506522b4f6b9c5c13b1c6f0c383/FLAGb6103e80a [2022-03-19 10:17:13,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efe8fdf5c/a2e47506522b4f6b9c5c13b1c6f0c383 [2022-03-19 10:17:13,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 10:17:13,043 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 10:17:13,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 10:17:13,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 10:17:13,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 10:17:13,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:17:13" (1/1) ... [2022-03-19 10:17:13,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a267bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:17:13, skipping insertion in model container [2022-03-19 10:17:13,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:17:13" (1/1) ... [2022-03-19 10:17:13,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 10:17:13,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 10:17:13,190 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/egcd-ll_unwindbound2.c[489,502] [2022-03-19 10:17:13,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:17:13,227 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 10:17:13,235 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/egcd-ll_unwindbound2.c[489,502] [2022-03-19 10:17:13,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:17:13,268 INFO L208 MainTranslator]: Completed translation [2022-03-19 10:17:13,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:17:13 WrapperNode [2022-03-19 10:17:13,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 10:17:13,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 10:17:13,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 10:17:13,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 10:17:13,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:17:13" (1/1) ... [2022-03-19 10:17:13,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:17:13" (1/1) ... [2022-03-19 10:17:13,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:17:13" (1/1) ... [2022-03-19 10:17:13,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:17:13" (1/1) ... [2022-03-19 10:17:13,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:17:13" (1/1) ... [2022-03-19 10:17:13,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:17:13" (1/1) ... [2022-03-19 10:17:13,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:17:13" (1/1) ... [2022-03-19 10:17:13,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 10:17:13,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 10:17:13,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 10:17:13,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 10:17:13,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:17:13" (1/1) ... [2022-03-19 10:17:13,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:17:13,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:17:13,330 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) [2022-03-19 10:17:13,340 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 [2022-03-19 10:17:13,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 10:17:13,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 10:17:13,363 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 10:17:13,363 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 10:17:13,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 10:17:13,364 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 10:17:13,364 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 10:17:13,364 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 10:17:13,364 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 10:17:13,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 10:17:13,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 10:17:13,364 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 10:17:13,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 10:17:13,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 10:17:13,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 10:17:13,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 10:17:13,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 10:17:13,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 10:17:13,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 10:17:13,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 10:17:13,416 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 10:17:13,417 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 10:17:13,555 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 10:17:13,559 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 10:17:13,560 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 10:17:13,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:17:13 BoogieIcfgContainer [2022-03-19 10:17:13,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 10:17:13,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 10:17:13,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 10:17:13,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 10:17:13,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:17:13" (1/3) ... [2022-03-19 10:17:13,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ff8ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:17:13, skipping insertion in model container [2022-03-19 10:17:13,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:17:13" (2/3) ... [2022-03-19 10:17:13,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ff8ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:17:13, skipping insertion in model container [2022-03-19 10:17:13,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:17:13" (3/3) ... [2022-03-19 10:17:13,567 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound2.c [2022-03-19 10:17:13,570 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 10:17:13,570 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 10:17:13,602 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 10:17:13,610 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 [2022-03-19 10:17:13,611 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 10:17:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 10:17:13,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 10:17:13,636 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:17:13,637 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:17:13,637 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:17:13,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:17:13,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2022-03-19 10:17:13,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:13,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [428101272] [2022-03-19 10:17:13,671 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:17:13,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 2 times [2022-03-19 10:17:13,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:17:13,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817125129] [2022-03-19 10:17:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:17:13,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:17:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:17:13,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 10:17:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:17:13,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 10:17:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:17:13,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 10:17:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:17:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:17:13,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:17:13,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817125129] [2022-03-19 10:17:13,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817125129] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:13,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:13,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 10:17:13,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:17:13,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [428101272] [2022-03-19 10:17:13,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [428101272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:13,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:13,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 10:17:13,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244274462] [2022-03-19 10:17:13,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:17:13,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 10:17:13,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:13,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 10:17:13,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 10:17:13,904 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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) [2022-03-19 10:17:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:17:14,002 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2022-03-19 10:17:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 10:17:14,004 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 [2022-03-19 10:17:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:17:14,014 INFO L225 Difference]: With dead ends: 64 [2022-03-19 10:17:14,015 INFO L226 Difference]: Without dead ends: 31 [2022-03-19 10:17:14,018 INFO L911 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 [2022-03-19 10:17:14,023 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:17:14,024 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:17:14,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-19 10:17:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-19 10:17:14,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 10:17:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-19 10:17:14,068 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-03-19 10:17:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:17:14,068 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-19 10:17:14,069 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) [2022-03-19 10:17:14,069 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-19 10:17:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 10:17:14,071 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:17:14,071 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:17:14,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 10:17:14,072 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:17:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:17:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2022-03-19 10:17:14,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:14,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1822661380] [2022-03-19 10:17:14,074 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:17:14,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 2 times [2022-03-19 10:17:14,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:17:14,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968549201] [2022-03-19 10:17:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:17:14,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:17:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:17:14,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 10:17:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:17:14,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 10:17:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:17:14,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 10:17:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:17:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:17:14,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:17:14,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968549201] [2022-03-19 10:17:14,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968549201] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:14,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:14,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:17:14,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:17:14,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1822661380] [2022-03-19 10:17:14,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1822661380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:14,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:14,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:17:14,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017618123] [2022-03-19 10:17:14,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:17:14,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:17:14,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:14,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:17:14,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:17:14,236 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:17:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:17:14,334 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-03-19 10:17:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:17:14,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-19 10:17:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:17:14,336 INFO L225 Difference]: With dead ends: 42 [2022-03-19 10:17:14,336 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 10:17:14,337 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:17:14,338 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:17:14,338 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:17:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 10:17:14,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 10:17:14,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 10:17:14,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-19 10:17:14,344 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-03-19 10:17:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:17:14,345 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-19 10:17:14,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:17:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-19 10:17:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 10:17:14,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:17:14,346 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:17:14,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 10:17:14,347 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:17:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:17:14,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2022-03-19 10:17:14,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:14,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [620533118] [2022-03-19 10:17:14,350 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:17:14,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 2 times [2022-03-19 10:17:14,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:17:14,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764656173] [2022-03-19 10:17:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:17:14,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:17:14,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:17:14,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250432475] [2022-03-19 10:17:14,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:17:14,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:14,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:17:14,381 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) [2022-03-19 10:17:14,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 10:17:14,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 10:17:14,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:17:14,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:17:14,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:17:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:17:14,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:17:14,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:17:14,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764656173] [2022-03-19 10:17:14,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:17:14,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250432475] [2022-03-19 10:17:14,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250432475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:14,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:14,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:17:14,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:17:14,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [620533118] [2022-03-19 10:17:14,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [620533118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:14,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:14,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:17:14,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608257151] [2022-03-19 10:17:14,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:17:14,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:17:14,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:14,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:17:14,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:17:14,561 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-19 10:17:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:17:14,631 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-03-19 10:17:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:17:14,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 23 [2022-03-19 10:17:14,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:17:14,632 INFO L225 Difference]: With dead ends: 49 [2022-03-19 10:17:14,632 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 10:17:14,633 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:17:14,634 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:17:14,634 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:17:14,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 10:17:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-19 10:17:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 10:17:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-03-19 10:17:14,658 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-03-19 10:17:14,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:17:14,658 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-03-19 10:17:14,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-19 10:17:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-03-19 10:17:14,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 10:17:14,659 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:17:14,659 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:17:14,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 10:17:14,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:14,878 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:17:14,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:17:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2022-03-19 10:17:14,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:14,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [645436795] [2022-03-19 10:17:14,879 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:17:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 2 times [2022-03-19 10:17:14,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:17:14,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612731215] [2022-03-19 10:17:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:17:14,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:17:14,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:17:14,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549133861] [2022-03-19 10:17:14,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:17:14,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:14,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:17:14,889 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) [2022-03-19 10:17:14,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 10:17:14,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:17:14,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:17:14,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:17:14,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:17:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:17:15,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:17:15,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:17:15,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612731215] [2022-03-19 10:17:15,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:17:15,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549133861] [2022-03-19 10:17:15,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549133861] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:15,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:15,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:17:15,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:17:15,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [645436795] [2022-03-19 10:17:15,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [645436795] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:15,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:15,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:17:15,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836034155] [2022-03-19 10:17:15,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:17:15,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:17:15,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:15,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:17:15,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:17:15,017 INFO L87 Difference]: Start difference. First operand 46 states and 63 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) [2022-03-19 10:17:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:17:15,051 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-03-19 10:17:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:17:15,051 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 28 [2022-03-19 10:17:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:17:15,052 INFO L225 Difference]: With dead ends: 53 [2022-03-19 10:17:15,052 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 10:17:15,053 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:17:15,054 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:17:15,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 156 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:17:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 10:17:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-19 10:17:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 10:17:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-03-19 10:17:15,061 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-03-19 10:17:15,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:17:15,062 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-03-19 10:17:15,062 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) [2022-03-19 10:17:15,062 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-03-19 10:17:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 10:17:15,063 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:17:15,063 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:17:15,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 10:17:15,280 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 10:17:15,280 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:17:15,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:17:15,281 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2022-03-19 10:17:15,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:15,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [649498997] [2022-03-19 10:17:15,281 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:17:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 2 times [2022-03-19 10:17:15,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:17:15,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647924967] [2022-03-19 10:17:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:17:15,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:17:15,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:17:15,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770184118] [2022-03-19 10:17:15,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:17:15,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:15,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:17:15,299 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) [2022-03-19 10:17:15,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 10:17:15,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:17:15,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:17:15,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 10:17:15,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:17:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 10:17:15,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:17:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 10:17:15,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:17:15,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647924967] [2022-03-19 10:17:15,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:17:15,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770184118] [2022-03-19 10:17:15,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770184118] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 10:17:15,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:17:15,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-19 10:17:15,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:17:15,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [649498997] [2022-03-19 10:17:15,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [649498997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:15,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:15,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:17:15,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651968369] [2022-03-19 10:17:15,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:17:15,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:17:15,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:15,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:17:15,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:17:15,578 INFO L87 Difference]: Start difference. First operand 50 states and 66 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:17:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:17:15,631 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2022-03-19 10:17:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:17:15,631 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-19 10:17:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:17:15,633 INFO L225 Difference]: With dead ends: 75 [2022-03-19 10:17:15,634 INFO L226 Difference]: Without dead ends: 71 [2022-03-19 10:17:15,634 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 10:17:15,635 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:17:15,635 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:17:15,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-19 10:17:15,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-19 10:17:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 40 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 10:17:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-03-19 10:17:15,646 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-03-19 10:17:15,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:17:15,646 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-03-19 10:17:15,647 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:17:15,647 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-03-19 10:17:15,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 10:17:15,647 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:17:15,647 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:17:15,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 10:17:15,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:15,870 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:17:15,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:17:15,870 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2022-03-19 10:17:15,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:15,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1670062986] [2022-03-19 10:17:15,871 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:17:15,871 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 2 times [2022-03-19 10:17:15,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:17:15,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430267635] [2022-03-19 10:17:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:17:15,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:17:15,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:17:15,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212414705] [2022-03-19 10:17:15,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:17:15,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:15,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:17:15,887 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) [2022-03-19 10:17:15,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 10:17:15,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:17:15,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:17:15,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 10:17:15,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:17:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 10:17:16,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:17:16,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:17:16,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430267635] [2022-03-19 10:17:16,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:17:16,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212414705] [2022-03-19 10:17:16,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212414705] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:16,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:16,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:17:16,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:17:16,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1670062986] [2022-03-19 10:17:16,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1670062986] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:16,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:16,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:17:16,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447509106] [2022-03-19 10:17:16,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:17:16,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:17:16,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:16,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:17:16,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:17:16,008 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 10:17:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:17:16,040 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2022-03-19 10:17:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:17:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-03-19 10:17:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:17:16,041 INFO L225 Difference]: With dead ends: 87 [2022-03-19 10:17:16,041 INFO L226 Difference]: Without dead ends: 85 [2022-03-19 10:17:16,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:17:16,042 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:17:16,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:17:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-19 10:17:16,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-03-19 10:17:16,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-19 10:17:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-03-19 10:17:16,053 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-03-19 10:17:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:17:16,053 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-03-19 10:17:16,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 10:17:16,054 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-03-19 10:17:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 10:17:16,054 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:17:16,055 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:17:16,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 10:17:16,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:16,272 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:17:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:17:16,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2022-03-19 10:17:16,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:16,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1740702723] [2022-03-19 10:17:16,273 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:17:16,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 2 times [2022-03-19 10:17:16,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:17:16,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625634898] [2022-03-19 10:17:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:17:16,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:17:16,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:17:16,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549117041] [2022-03-19 10:17:16,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:17:16,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:16,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:17:16,282 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) [2022-03-19 10:17:16,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 10:17:16,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:17:16,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:17:16,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 10:17:16,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:17:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 10:17:16,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:17:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 10:17:16,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:17:16,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625634898] [2022-03-19 10:17:16,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:17:16,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549117041] [2022-03-19 10:17:16,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549117041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:17:16,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:17:16,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-03-19 10:17:16,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:17:16,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1740702723] [2022-03-19 10:17:16,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1740702723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:16,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:16,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:17:16,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65885875] [2022-03-19 10:17:16,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:17:16,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:17:16,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:16,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:17:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:17:16,492 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 10:17:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:17:16,539 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-03-19 10:17:16,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:17:16,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-19 10:17:16,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:17:16,542 INFO L225 Difference]: With dead ends: 121 [2022-03-19 10:17:16,542 INFO L226 Difference]: Without dead ends: 102 [2022-03-19 10:17:16,543 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:17:16,543 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:17:16,544 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:17:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-19 10:17:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-03-19 10:17:16,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 13 states have call predecessors, (31), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-19 10:17:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2022-03-19 10:17:16,571 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 42 [2022-03-19 10:17:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:17:16,572 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2022-03-19 10:17:16,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 10:17:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2022-03-19 10:17:16,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 10:17:16,574 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:17:16,574 INFO L500 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, 1, 1] [2022-03-19 10:17:16,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 10:17:16,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:16,780 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:17:16,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:17:16,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 1 times [2022-03-19 10:17:16,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:16,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2115980583] [2022-03-19 10:17:16,781 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:17:16,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 2 times [2022-03-19 10:17:16,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:17:16,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061567298] [2022-03-19 10:17:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:17:16,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:17:16,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:17:16,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067601107] [2022-03-19 10:17:16,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:17:16,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:16,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:17:16,799 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) [2022-03-19 10:17:16,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 10:17:16,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:17:16,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:17:16,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 10:17:16,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:17:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 10:17:16,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:17:16,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:17:16,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061567298] [2022-03-19 10:17:16,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:17:16,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067601107] [2022-03-19 10:17:16,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067601107] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:16,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:16,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:17:16,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:17:16,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2115980583] [2022-03-19 10:17:16,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2115980583] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:16,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:16,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:17:16,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274811315] [2022-03-19 10:17:16,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:17:16,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:17:16,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:16,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:17:16,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:17:16,960 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 10:17:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:17:16,989 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2022-03-19 10:17:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:17:16,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-19 10:17:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:17:16,991 INFO L225 Difference]: With dead ends: 106 [2022-03-19 10:17:16,991 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 10:17:16,991 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:17:16,992 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:17:16,992 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:17:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 10:17:16,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-19 10:17:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 10:17:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2022-03-19 10:17:17,001 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2022-03-19 10:17:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:17:17,001 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2022-03-19 10:17:17,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 10:17:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2022-03-19 10:17:17,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 10:17:17,002 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:17:17,002 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:17:17,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 10:17:17,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:17,216 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:17:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:17:17,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2022-03-19 10:17:17,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:17,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1089544730] [2022-03-19 10:17:17,216 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:17:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 2 times [2022-03-19 10:17:17,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:17:17,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765643241] [2022-03-19 10:17:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:17:17,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:17:17,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:17:17,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661776745] [2022-03-19 10:17:17,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:17:17,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:17,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:17:17,225 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) [2022-03-19 10:17:17,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 10:17:17,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:17:17,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:17:17,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 10:17:17,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:17:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 10:17:17,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:17:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 10:17:17,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:17:17,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765643241] [2022-03-19 10:17:17,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:17:17,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661776745] [2022-03-19 10:17:17,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661776745] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:17:17,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:17:17,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 10:17:17,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:17:17,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1089544730] [2022-03-19 10:17:17,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1089544730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:17,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:17,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:17:17,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524731127] [2022-03-19 10:17:17,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:17:17,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:17:17,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:17,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:17:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:17:17,470 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:17:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:17:17,576 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2022-03-19 10:17:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 10:17:17,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-19 10:17:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:17:17,578 INFO L225 Difference]: With dead ends: 118 [2022-03-19 10:17:17,578 INFO L226 Difference]: Without dead ends: 106 [2022-03-19 10:17:17,578 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:17:17,579 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:17:17,579 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 166 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:17:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-19 10:17:17,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-03-19 10:17:17,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-19 10:17:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2022-03-19 10:17:17,588 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2022-03-19 10:17:17,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:17:17,589 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2022-03-19 10:17:17,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:17:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2022-03-19 10:17:17,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 10:17:17,589 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:17:17,589 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:17:17,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 10:17:17,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:17,804 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:17:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:17:17,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 3 times [2022-03-19 10:17:17,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:17,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [924107509] [2022-03-19 10:17:17,805 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:17:17,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 4 times [2022-03-19 10:17:17,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:17:17,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089828927] [2022-03-19 10:17:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:17:17,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:17:17,811 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:17:17,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676998184] [2022-03-19 10:17:17,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:17:17,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:17,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:17:17,813 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) [2022-03-19 10:17:17,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 10:17:17,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:17:17,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:17:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 10:17:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:17:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 10:17:18,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:17:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 10:17:18,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:17:18,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089828927] [2022-03-19 10:17:18,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:17:18,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676998184] [2022-03-19 10:17:18,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676998184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:17:18,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:17:18,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-19 10:17:18,286 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:17:18,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [924107509] [2022-03-19 10:17:18,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [924107509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:18,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:18,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 10:17:18,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124790524] [2022-03-19 10:17:18,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:17:18,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 10:17:18,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:18,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 10:17:18,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:17:18,288 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 10:17:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:17:18,450 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2022-03-19 10:17:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:17:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2022-03-19 10:17:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:17:18,452 INFO L225 Difference]: With dead ends: 131 [2022-03-19 10:17:18,452 INFO L226 Difference]: Without dead ends: 129 [2022-03-19 10:17:18,452 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:17:18,453 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:17:18,453 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 210 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:17:18,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-19 10:17:18,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-03-19 10:17:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 10:17:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-03-19 10:17:18,465 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2022-03-19 10:17:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:17:18,465 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-03-19 10:17:18,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 10:17:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-03-19 10:17:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 10:17:18,466 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:17:18,466 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:17:18,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 10:17:18,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 10:17:18,684 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:17:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:17:18,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 1 times [2022-03-19 10:17:18,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:18,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [224650762] [2022-03-19 10:17:18,685 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:17:18,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2022-03-19 10:17:18,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:17:18,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765709470] [2022-03-19 10:17:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:17:18,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:17:18,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:17:18,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911690000] [2022-03-19 10:17:18,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:17:18,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:18,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:17:18,692 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) [2022-03-19 10:17:18,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 10:17:18,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:17:18,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:17:18,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 10:17:18,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:17:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 10:17:18,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:17:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 10:17:19,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:17:19,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765709470] [2022-03-19 10:17:19,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:17:19,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911690000] [2022-03-19 10:17:19,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911690000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:17:19,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:17:19,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-19 10:17:19,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:17:19,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [224650762] [2022-03-19 10:17:19,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [224650762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:17:19,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:17:19,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:17:19,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933383455] [2022-03-19 10:17:19,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:17:19,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:17:19,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:19,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:17:19,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:17:19,129 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 10:17:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:17:19,297 INFO L93 Difference]: Finished difference Result 160 states and 210 transitions. [2022-03-19 10:17:19,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 10:17:19,298 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2022-03-19 10:17:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:17:19,299 INFO L225 Difference]: With dead ends: 160 [2022-03-19 10:17:19,299 INFO L226 Difference]: Without dead ends: 153 [2022-03-19 10:17:19,299 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:17:19,300 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:17:19,300 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 214 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:17:19,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-19 10:17:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-19 10:17:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 96 states have internal predecessors, (106), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 10:17:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2022-03-19 10:17:19,336 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 52 [2022-03-19 10:17:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:17:19,336 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2022-03-19 10:17:19,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 10:17:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2022-03-19 10:17:19,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 10:17:19,336 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:17:19,337 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:17:19,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 10:17:19,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:19,551 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:17:19,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:17:19,552 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 3 times [2022-03-19 10:17:19,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:17:19,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1877753743] [2022-03-19 10:17:19,552 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:17:19,552 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 4 times [2022-03-19 10:17:19,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:17:19,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632452153] [2022-03-19 10:17:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:17:19,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:17:19,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:17:19,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588327391] [2022-03-19 10:17:19,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:17:19,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:17:19,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:17:19,561 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) [2022-03-19 10:17:19,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 10:17:19,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:17:19,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-19 10:17:19,602 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 10:17:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 10:17:19,639 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 10:17:19,640 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-19 10:17:19,640 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-19 10:17:19,642 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 10:17:19,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 10:17:19,846 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 10:17:19,849 INFO L718 BasicCegarLoop]: Path program histogram: [4, 4, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-19 10:17:19,851 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 10:17:19,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 10:17:19 BoogieIcfgContainer [2022-03-19 10:17:19,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 10:17:19,861 INFO L158 Benchmark]: Toolchain (without parser) took 6818.35ms. Allocated memory was 207.6MB in the beginning and 294.6MB in the end (delta: 87.0MB). Free memory was 157.9MB in the beginning and 254.6MB in the end (delta: -96.7MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 10:17:19,862 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 207.6MB. Free memory is still 174.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 10:17:19,862 INFO L158 Benchmark]: CACSL2BoogieTranslator took 218.30ms. Allocated memory is still 207.6MB. Free memory was 157.7MB in the beginning and 183.0MB in the end (delta: -25.2MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. [2022-03-19 10:17:19,862 INFO L158 Benchmark]: Boogie Preprocessor took 34.53ms. Allocated memory is still 207.6MB. Free memory was 183.0MB in the beginning and 181.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 10:17:19,862 INFO L158 Benchmark]: RCFGBuilder took 256.64ms. Allocated memory is still 207.6MB. Free memory was 181.4MB in the beginning and 170.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-19 10:17:19,862 INFO L158 Benchmark]: TraceAbstraction took 6298.95ms. Allocated memory was 207.6MB in the beginning and 294.6MB in the end (delta: 87.0MB). Free memory was 170.4MB in the beginning and 254.6MB in the end (delta: -84.2MB). Peak memory consumption was 3.8MB. Max. memory is 8.0GB. [2022-03-19 10:17:19,863 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 207.6MB. Free memory is still 174.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 218.30ms. Allocated memory is still 207.6MB. Free memory was 157.7MB in the beginning and 183.0MB in the end (delta: -25.2MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.53ms. Allocated memory is still 207.6MB. Free memory was 183.0MB in the beginning and 181.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 256.64ms. Allocated memory is still 207.6MB. Free memory was 181.4MB in the beginning and 170.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 6298.95ms. Allocated memory was 207.6MB in the beginning and 294.6MB in the end (delta: 87.0MB). Free memory was 170.4MB in the beginning and 254.6MB in the end (delta: -84.2MB). Peak memory consumption was 3.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L34] EXPR counter++ [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND FALSE !(counter++<2) [L53] CALL __VERIFIER_assert(a - b == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.3s, OverallIterations: 12, TraceHistogramMax: 7, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 193 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 145 mSDsluCounter, 1572 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1150 mSDsCounter, 78 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 922 IncrementalHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 78 mSolverCounterUnsat, 422 mSDtfsCounter, 922 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 595 GetRequests, 516 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=153occurred in iteration=11, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 19 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-19 10:17:19,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...