/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/prod4br-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 12:01:24,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 12:01:24,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 12:01:24,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 12:01:24,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 12:01:24,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 12:01:24,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 12:01:24,363 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 12:01:24,373 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 12:01:24,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 12:01:24,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 12:01:24,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 12:01:24,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 12:01:24,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 12:01:24,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 12:01:24,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 12:01:24,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 12:01:24,377 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 12:01:24,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 12:01:24,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 12:01:24,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 12:01:24,378 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 12:01:24,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 12:01:24,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 12:01:24,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 12:01:24,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 12:01:24,378 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 12:01:24,378 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 12:01:24,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 12:01:24,379 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 12:01:24,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 12:01:24,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 12:01:24,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 12:01:24,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 12:01:24,636 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 12:01:24,637 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 12:01:24,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound5.c [2022-03-19 12:01:24,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20675244b/35f07f2269e84781ace4a04273dc6977/FLAG62f863748 [2022-03-19 12:01:25,049 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 12:01:25,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound5.c [2022-03-19 12:01:25,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20675244b/35f07f2269e84781ace4a04273dc6977/FLAG62f863748 [2022-03-19 12:01:25,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20675244b/35f07f2269e84781ace4a04273dc6977 [2022-03-19 12:01:25,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 12:01:25,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 12:01:25,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 12:01:25,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 12:01:25,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 12:01:25,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:01:25" (1/1) ... [2022-03-19 12:01:25,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d93d4c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:01:25, skipping insertion in model container [2022-03-19 12:01:25,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:01:25" (1/1) ... [2022-03-19 12:01:25,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 12:01:25,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 12:01:25,270 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/prod4br-ll_valuebound5.c[524,537] [2022-03-19 12:01:25,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 12:01:25,289 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 12:01:25,297 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/prod4br-ll_valuebound5.c[524,537] [2022-03-19 12:01:25,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 12:01:25,315 INFO L208 MainTranslator]: Completed translation [2022-03-19 12:01:25,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:01:25 WrapperNode [2022-03-19 12:01:25,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 12:01:25,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 12:01:25,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 12:01:25,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 12:01:25,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:01:25" (1/1) ... [2022-03-19 12:01:25,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:01:25" (1/1) ... [2022-03-19 12:01:25,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:01:25" (1/1) ... [2022-03-19 12:01:25,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:01:25" (1/1) ... [2022-03-19 12:01:25,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:01:25" (1/1) ... [2022-03-19 12:01:25,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:01:25" (1/1) ... [2022-03-19 12:01:25,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:01:25" (1/1) ... [2022-03-19 12:01:25,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 12:01:25,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 12:01:25,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 12:01:25,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 12:01:25,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:01:25" (1/1) ... [2022-03-19 12:01:25,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 12:01:25,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:01:25,372 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 12:01:25,378 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 12:01:25,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 12:01:25,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 12:01:25,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 12:01:25,405 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 12:01:25,405 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 12:01:25,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 12:01:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 12:01:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 12:01:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 12:01:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 12:01:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 12:01:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 12:01:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 12:01:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 12:01:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 12:01:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 12:01:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 12:01:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 12:01:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 12:01:25,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 12:01:25,454 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 12:01:25,455 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 12:01:25,610 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 12:01:25,615 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 12:01:25,615 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 12:01:25,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:01:25 BoogieIcfgContainer [2022-03-19 12:01:25,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 12:01:25,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 12:01:25,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 12:01:25,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 12:01:25,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 12:01:25" (1/3) ... [2022-03-19 12:01:25,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37691809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:01:25, skipping insertion in model container [2022-03-19 12:01:25,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:01:25" (2/3) ... [2022-03-19 12:01:25,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37691809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:01:25, skipping insertion in model container [2022-03-19 12:01:25,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:01:25" (3/3) ... [2022-03-19 12:01:25,640 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound5.c [2022-03-19 12:01:25,644 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 12:01:25,644 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 12:01:25,711 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 12:01:25,718 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 12:01:25,719 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 12:01:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 12:01:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 12:01:25,739 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:01:25,740 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:01:25,740 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:01:25,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:01:25,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 1 times [2022-03-19 12:01:25,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:25,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1542127421] [2022-03-19 12:01:25,767 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:01:25,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 2 times [2022-03-19 12:01:25,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:01:25,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246361183] [2022-03-19 12:01:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:01:25,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:01:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:01:25,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 12:01:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:01:25,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 12:01:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:01:25,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 12:01:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:01:25,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 12:01:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:01:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:01:25,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:01:25,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246361183] [2022-03-19 12:01:25,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246361183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:25,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:25,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 12:01:25,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:01:25,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1542127421] [2022-03-19 12:01:25,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1542127421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:25,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:25,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 12:01:25,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092883135] [2022-03-19 12:01:25,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:01:25,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 12:01:25,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:25,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 12:01:25,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 12:01:25,991 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 12:01:26,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:01:26,043 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2022-03-19 12:01:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 12:01:26,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-19 12:01:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:01:26,051 INFO L225 Difference]: With dead ends: 61 [2022-03-19 12:01:26,051 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 12:01:26,053 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 12:01:26,056 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 12:01:26,057 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 12:01:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 12:01:26,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-19 12:01:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 12:01:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-03-19 12:01:26,097 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 28 [2022-03-19 12:01:26,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:01:26,097 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-03-19 12:01:26,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 12:01:26,098 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-03-19 12:01:26,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 12:01:26,099 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:01:26,099 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:01:26,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 12:01:26,100 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:01:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:01:26,100 INFO L85 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 1 times [2022-03-19 12:01:26,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:26,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1867318617] [2022-03-19 12:01:26,101 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:01:26,102 INFO L85 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 2 times [2022-03-19 12:01:26,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:01:26,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238248275] [2022-03-19 12:01:26,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:01:26,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:01:26,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:01:26,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860450608] [2022-03-19 12:01:26,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:01:26,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:26,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:01:26,121 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 12:01:26,122 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 12:01:26,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 12:01:26,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:01:26,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 12:01:26,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:01:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:01:26,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 12:01:26,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:01:26,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238248275] [2022-03-19 12:01:26,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:01:26,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860450608] [2022-03-19 12:01:26,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860450608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:26,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:26,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 12:01:26,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:01:26,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1867318617] [2022-03-19 12:01:26,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1867318617] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:26,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:26,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 12:01:26,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794263576] [2022-03-19 12:01:26,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:01:26,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 12:01:26,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:26,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 12:01:26,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 12:01:26,371 INFO L87 Difference]: Start difference. First operand 29 states and 36 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 12:01:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:01:26,449 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-03-19 12:01:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 12:01:26,450 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-19 12:01:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:01:26,451 INFO L225 Difference]: With dead ends: 43 [2022-03-19 12:01:26,451 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 12:01:26,451 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 12:01:26,453 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 12:01:26,453 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 101 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 12:01:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 12:01:26,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2022-03-19 12:01:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 12:01:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-03-19 12:01:26,463 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 28 [2022-03-19 12:01:26,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:01:26,465 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-03-19 12:01:26,465 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 12:01:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-03-19 12:01:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 12:01:26,467 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:01:26,468 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 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 12:01:26,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 12:01:26,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:26,684 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:01:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:01:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1139707498, now seen corresponding path program 1 times [2022-03-19 12:01:26,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:26,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1368969649] [2022-03-19 12:01:26,685 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:01:26,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1139707498, now seen corresponding path program 2 times [2022-03-19 12:01:26,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:01:26,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532979083] [2022-03-19 12:01:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:01:26,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:01:26,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:01:26,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227407749] [2022-03-19 12:01:26,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:01:26,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:26,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:01:26,702 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 12:01:26,733 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 12:01:26,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:01:26,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:01:26,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 12:01:26,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:01:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 12:01:27,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:01:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:01:27,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:01:27,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532979083] [2022-03-19 12:01:27,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:01:27,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227407749] [2022-03-19 12:01:27,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227407749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:01:27,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:01:27,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-03-19 12:01:27,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:01:27,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1368969649] [2022-03-19 12:01:27,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1368969649] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:27,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:27,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 12:01:27,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989867208] [2022-03-19 12:01:27,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:01:27,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 12:01:27,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:27,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 12:01:27,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-19 12:01:27,437 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 12:01:29,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:01:31,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:01:31,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:01:31,969 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-03-19 12:01:31,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 12:01:31,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2022-03-19 12:01:31,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:01:31,971 INFO L225 Difference]: With dead ends: 47 [2022-03-19 12:01:31,971 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 12:01:31,972 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-19 12:01:31,973 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-19 12:01:31,974 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 148 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 209 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-03-19 12:01:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 12:01:31,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-03-19 12:01:31,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 12:01:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-19 12:01:31,986 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 34 [2022-03-19 12:01:31,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:01:31,986 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-19 12:01:31,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 12:01:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-19 12:01:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 12:01:31,987 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:01:31,988 INFO L500 BasicCegarLoop]: trace histogram [3, 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] [2022-03-19 12:01:32,010 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 12:01:32,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 12:01:32,204 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:01:32,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:01:32,204 INFO L85 PathProgramCache]: Analyzing trace with hash 412541489, now seen corresponding path program 1 times [2022-03-19 12:01:32,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:32,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1378681234] [2022-03-19 12:01:32,205 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:01:32,205 INFO L85 PathProgramCache]: Analyzing trace with hash 412541489, now seen corresponding path program 2 times [2022-03-19 12:01:32,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:01:32,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84520219] [2022-03-19 12:01:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:01:32,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:01:32,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:01:32,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564047996] [2022-03-19 12:01:32,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:01:32,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:32,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:01:32,229 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 12:01:32,230 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 12:01:32,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:01:32,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:01:32,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 12:01:32,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:01:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:01:33,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:01:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 12:01:35,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:01:35,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84520219] [2022-03-19 12:01:35,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:01:35,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564047996] [2022-03-19 12:01:35,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564047996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:01:35,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:01:35,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2022-03-19 12:01:35,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:01:35,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1378681234] [2022-03-19 12:01:35,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1378681234] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:35,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:35,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 12:01:35,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704699785] [2022-03-19 12:01:35,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:01:35,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 12:01:35,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:35,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 12:01:35,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-03-19 12:01:35,164 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 12:01:35,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:01:35,431 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2022-03-19 12:01:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 12:01:35,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2022-03-19 12:01:35,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:01:35,433 INFO L225 Difference]: With dead ends: 63 [2022-03-19 12:01:35,433 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 12:01:35,434 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-03-19 12:01:35,435 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 12:01:35,435 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 136 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 12:01:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 12:01:35,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-03-19 12:01:35,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 12:01:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-03-19 12:01:35,447 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 36 [2022-03-19 12:01:35,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:01:35,447 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-03-19 12:01:35,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 12:01:35,447 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-03-19 12:01:35,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 12:01:35,448 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:01:35,448 INFO L500 BasicCegarLoop]: trace histogram [3, 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] [2022-03-19 12:01:35,476 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 12:01:35,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:35,673 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:01:35,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:01:35,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2032180221, now seen corresponding path program 1 times [2022-03-19 12:01:35,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:35,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1039269969] [2022-03-19 12:01:35,675 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:01:35,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2032180221, now seen corresponding path program 2 times [2022-03-19 12:01:35,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:01:35,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434944473] [2022-03-19 12:01:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:01:35,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:01:35,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:01:35,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863662345] [2022-03-19 12:01:35,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:01:35,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:35,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:01:35,690 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 12:01:35,708 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 12:01:35,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:01:35,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:01:35,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 12:01:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:01:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 12:01:36,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:01:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:01:36,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:01:36,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434944473] [2022-03-19 12:01:36,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:01:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863662345] [2022-03-19 12:01:36,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863662345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:01:36,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:01:36,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-19 12:01:36,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:01:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1039269969] [2022-03-19 12:01:36,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1039269969] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:36,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:36,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 12:01:36,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27696686] [2022-03-19 12:01:36,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:01:36,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 12:01:36,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:36,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 12:01:36,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-19 12:01:36,297 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 12:01:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:01:36,540 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2022-03-19 12:01:36,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 12:01:36,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-03-19 12:01:36,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:01:36,541 INFO L225 Difference]: With dead ends: 78 [2022-03-19 12:01:36,541 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 12:01:36,542 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-19 12:01:36,543 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 12:01:36,543 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 129 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 12:01:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 12:01:36,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-03-19 12:01:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.275) internal successors, (51), 42 states have internal predecessors, (51), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 12:01:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-03-19 12:01:36,578 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 37 [2022-03-19 12:01:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:01:36,578 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-03-19 12:01:36,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 12:01:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-03-19 12:01:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 12:01:36,580 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:01:36,580 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 12:01:36,604 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 12:01:36,804 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:36,805 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:01:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:01:36,805 INFO L85 PathProgramCache]: Analyzing trace with hash 262800198, now seen corresponding path program 1 times [2022-03-19 12:01:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:36,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1658268171] [2022-03-19 12:01:36,806 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:01:36,806 INFO L85 PathProgramCache]: Analyzing trace with hash 262800198, now seen corresponding path program 2 times [2022-03-19 12:01:36,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:01:36,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963212264] [2022-03-19 12:01:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:01:36,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:01:36,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:01:36,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884613113] [2022-03-19 12:01:36,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:01:36,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:36,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:01:36,821 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 12:01:36,825 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 12:01:36,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:01:36,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:01:36,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 12:01:36,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:01:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 12:01:37,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:01:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 12:01:37,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:01:37,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963212264] [2022-03-19 12:01:37,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:01:37,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884613113] [2022-03-19 12:01:37,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884613113] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 12:01:37,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 12:01:37,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-19 12:01:37,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:01:37,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1658268171] [2022-03-19 12:01:37,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1658268171] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:37,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:37,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 12:01:37,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068237081] [2022-03-19 12:01:37,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:01:37,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 12:01:37,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:37,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 12:01:37,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-19 12:01:37,130 INFO L87 Difference]: Start difference. First operand 60 states and 73 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), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 12:01:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:01:37,292 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-03-19 12:01:37,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 12:01:37,293 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), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-03-19 12:01:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:01:37,294 INFO L225 Difference]: With dead ends: 66 [2022-03-19 12:01:37,294 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 12:01:37,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-19 12:01:37,295 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 12:01:37,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 12:01:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 12:01:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-19 12:01:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 38 states have internal predecessors, (47), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 12:01:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-03-19 12:01:37,306 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 39 [2022-03-19 12:01:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:01:37,306 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-03-19 12:01:37,306 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), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 12:01:37,306 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-03-19 12:01:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 12:01:37,307 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:01:37,307 INFO L500 BasicCegarLoop]: trace histogram [3, 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 12:01:37,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-19 12:01:37,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:37,520 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:01:37,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:01:37,520 INFO L85 PathProgramCache]: Analyzing trace with hash 844519116, now seen corresponding path program 1 times [2022-03-19 12:01:37,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:37,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [343397691] [2022-03-19 12:01:37,521 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:01:37,521 INFO L85 PathProgramCache]: Analyzing trace with hash 844519116, now seen corresponding path program 2 times [2022-03-19 12:01:37,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:01:37,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988803815] [2022-03-19 12:01:37,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:01:37,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:01:37,532 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:01:37,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565459121] [2022-03-19 12:01:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:01:37,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:37,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:01:37,534 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 12:01:37,561 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 12:01:37,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:01:37,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:01:37,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 12:01:37,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:01:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 12:01:37,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:01:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:01:38,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:01:38,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988803815] [2022-03-19 12:01:38,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:01:38,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565459121] [2022-03-19 12:01:38,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565459121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:01:38,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:01:38,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-19 12:01:38,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:01:38,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [343397691] [2022-03-19 12:01:38,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [343397691] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:38,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:38,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 12:01:38,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644306247] [2022-03-19 12:01:38,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:01:38,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 12:01:38,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 12:01:38,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-19 12:01:38,173 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 12:01:38,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:01:38,442 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2022-03-19 12:01:38,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 12:01:38,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2022-03-19 12:01:38,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:01:38,444 INFO L225 Difference]: With dead ends: 79 [2022-03-19 12:01:38,444 INFO L226 Difference]: Without dead ends: 66 [2022-03-19 12:01:38,444 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-19 12:01:38,445 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 12:01:38,445 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 125 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 12:01:38,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-19 12:01:38,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-19 12:01:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 12:01:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-03-19 12:01:38,457 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 38 [2022-03-19 12:01:38,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:01:38,457 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-03-19 12:01:38,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 12:01:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-03-19 12:01:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 12:01:38,458 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:01:38,458 INFO L500 BasicCegarLoop]: trace histogram [3, 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 12:01:38,486 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 12:01:38,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:38,675 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:01:38,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:01:38,675 INFO L85 PathProgramCache]: Analyzing trace with hash 901777418, now seen corresponding path program 1 times [2022-03-19 12:01:38,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:38,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1475390549] [2022-03-19 12:01:38,676 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:01:38,676 INFO L85 PathProgramCache]: Analyzing trace with hash 901777418, now seen corresponding path program 2 times [2022-03-19 12:01:38,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:01:38,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858538435] [2022-03-19 12:01:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:01:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:01:38,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:01:38,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149861435] [2022-03-19 12:01:38,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:01:38,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:38,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:01:38,696 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 12:01:38,698 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 12:01:38,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:01:38,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:01:38,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 12:01:38,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:01:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:01:39,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:01:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:01:40,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:01:40,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858538435] [2022-03-19 12:01:40,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:01:40,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149861435] [2022-03-19 12:01:40,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149861435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:01:40,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:01:40,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-03-19 12:01:40,701 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:01:40,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1475390549] [2022-03-19 12:01:40,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1475390549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:40,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:40,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 12:01:40,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544842251] [2022-03-19 12:01:40,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:01:40,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 12:01:40,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:40,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 12:01:40,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-03-19 12:01:40,702 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 12:01:40,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:01:40,902 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2022-03-19 12:01:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 12:01:40,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2022-03-19 12:01:40,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:01:40,903 INFO L225 Difference]: With dead ends: 86 [2022-03-19 12:01:40,903 INFO L226 Difference]: Without dead ends: 73 [2022-03-19 12:01:40,904 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-03-19 12:01:40,904 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 12:01:40,905 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 158 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 12:01:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-19 12:01:40,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-03-19 12:01:40,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 52 states have internal predecessors, (65), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 12:01:40,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2022-03-19 12:01:40,917 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 38 [2022-03-19 12:01:40,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:01:40,918 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2022-03-19 12:01:40,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 12:01:40,918 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2022-03-19 12:01:40,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 12:01:40,919 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:01:40,919 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1] [2022-03-19 12:01:40,935 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 12:01:41,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:41,124 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:01:41,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:01:41,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1669465851, now seen corresponding path program 1 times [2022-03-19 12:01:41,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:41,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [381484950] [2022-03-19 12:01:41,125 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:01:41,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1669465851, now seen corresponding path program 2 times [2022-03-19 12:01:41,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:01:41,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856713410] [2022-03-19 12:01:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:01:41,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:01:41,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:01:41,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76770583] [2022-03-19 12:01:41,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:01:41,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:41,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:01:41,136 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 12:01:41,159 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 12:01:41,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:01:41,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:01:41,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 12:01:41,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:01:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 12:01:41,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:01:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 12:01:41,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:01:41,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856713410] [2022-03-19 12:01:41,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:01:41,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76770583] [2022-03-19 12:01:41,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76770583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:01:41,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:01:41,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-19 12:01:41,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:01:41,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [381484950] [2022-03-19 12:01:41,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [381484950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:41,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:41,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 12:01:41,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099572291] [2022-03-19 12:01:41,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:01:41,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 12:01:41,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:41,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 12:01:41,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 12:01:41,490 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 12:01:43,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:01:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:01:43,945 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2022-03-19 12:01:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 12:01:43,946 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-03-19 12:01:43,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:01:43,947 INFO L225 Difference]: With dead ends: 85 [2022-03-19 12:01:43,947 INFO L226 Difference]: Without dead ends: 78 [2022-03-19 12:01:43,949 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-19 12:01:43,951 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 12:01:43,952 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 164 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 12:01:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-19 12:01:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2022-03-19 12:01:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 12:01:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2022-03-19 12:01:43,970 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 43 [2022-03-19 12:01:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:01:43,970 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2022-03-19 12:01:43,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 12:01:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2022-03-19 12:01:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 12:01:43,971 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:01:43,972 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:01:43,990 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 12:01:44,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 12:01:44,176 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:01:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:01:44,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1139704970, now seen corresponding path program 3 times [2022-03-19 12:01:44,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:44,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [9399511] [2022-03-19 12:01:44,177 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:01:44,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1139704970, now seen corresponding path program 4 times [2022-03-19 12:01:44,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:01:44,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846068428] [2022-03-19 12:01:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:01:44,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:01:44,186 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:01:44,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26215700] [2022-03-19 12:01:44,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 12:01:44,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:44,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:01:44,188 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 12:01:44,191 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 12:01:44,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 12:01:44,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:01:44,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-19 12:01:44,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:01:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 12:01:46,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:01:53,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:01:53,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846068428] [2022-03-19 12:01:53,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:01:53,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26215700] [2022-03-19 12:01:53,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26215700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 12:01:53,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 12:01:53,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 12:01:53,827 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:01:53,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [9399511] [2022-03-19 12:01:53,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [9399511] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:53,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:53,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 12:01:53,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598463393] [2022-03-19 12:01:53,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:01:53,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 12:01:53,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:53,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 12:01:53,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-03-19 12:01:53,828 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 12:01:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:01:54,417 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2022-03-19 12:01:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 12:01:54,420 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2022-03-19 12:01:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:01:54,421 INFO L225 Difference]: With dead ends: 104 [2022-03-19 12:01:54,421 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 12:01:54,421 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-03-19 12:01:54,422 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 12:01:54,422 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 164 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 12:01:54,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 12:01:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2022-03-19 12:01:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 62 states have internal predecessors, (75), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 12:01:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2022-03-19 12:01:54,442 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 44 [2022-03-19 12:01:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:01:54,442 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2022-03-19 12:01:54,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 12:01:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2022-03-19 12:01:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 12:01:54,444 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:01:54,444 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1] [2022-03-19 12:01:54,471 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 12:01:54,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 12:01:54,672 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:01:54,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:01:54,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1372706166, now seen corresponding path program 1 times [2022-03-19 12:01:54,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:54,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [215903596] [2022-03-19 12:01:54,673 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:01:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1372706166, now seen corresponding path program 2 times [2022-03-19 12:01:54,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:01:54,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029250235] [2022-03-19 12:01:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:01:54,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:01:54,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:01:54,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174228776] [2022-03-19 12:01:54,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:01:54,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:54,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:01:54,690 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 12:01:54,691 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 12:01:54,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:01:54,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:01:54,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 12:01:54,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:01:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 12:01:54,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:01:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 12:01:54,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:01:54,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029250235] [2022-03-19 12:01:54,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:01:54,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174228776] [2022-03-19 12:01:54,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174228776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:01:54,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:01:54,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-19 12:01:54,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:01:54,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [215903596] [2022-03-19 12:01:54,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [215903596] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:54,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:54,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 12:01:54,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907458943] [2022-03-19 12:01:54,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:01:54,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 12:01:54,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:54,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 12:01:54,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 12:01:54,973 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 12:01:57,267 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:01:57,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:01:57,592 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2022-03-19 12:01:57,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 12:01:57,593 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-03-19 12:01:57,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:01:57,593 INFO L225 Difference]: With dead ends: 102 [2022-03-19 12:01:57,593 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 12:01:57,594 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-19 12:01:57,594 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-19 12:01:57,594 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 164 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-03-19 12:01:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 12:01:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-03-19 12:01:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 62 states have internal predecessors, (74), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 12:01:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2022-03-19 12:01:57,609 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 44 [2022-03-19 12:01:57,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:01:57,609 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2022-03-19 12:01:57,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 12:01:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2022-03-19 12:01:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 12:01:57,610 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:01:57,610 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1] [2022-03-19 12:01:57,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-19 12:01:57,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 12:01:57,815 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:01:57,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:01:57,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1114540728, now seen corresponding path program 1 times [2022-03-19 12:01:57,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:57,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1239382316] [2022-03-19 12:01:57,816 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:01:57,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1114540728, now seen corresponding path program 2 times [2022-03-19 12:01:57,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:01:57,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195774474] [2022-03-19 12:01:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:01:57,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:01:57,824 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:01:57,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881353133] [2022-03-19 12:01:57,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:01:57,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:01:57,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:01:57,826 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:01:57,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 12:01:57,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:01:57,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:01:57,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 12:01:57,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:01:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 12:01:58,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:01:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 12:01:58,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:01:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195774474] [2022-03-19 12:01:58,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:01:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881353133] [2022-03-19 12:01:58,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881353133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:01:58,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:01:58,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2022-03-19 12:01:58,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:01:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1239382316] [2022-03-19 12:01:58,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1239382316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:01:58,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:01:58,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 12:01:58,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498269444] [2022-03-19 12:01:58,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:01:58,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 12:01:58,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:01:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 12:01:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-19 12:01:58,541 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 12:02:00,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:03,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:05,577 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:05,748 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2022-03-19 12:02:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 12:02:05,748 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2022-03-19 12:02:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:05,749 INFO L225 Difference]: With dead ends: 94 [2022-03-19 12:02:05,749 INFO L226 Difference]: Without dead ends: 87 [2022-03-19 12:02:05,750 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-19 12:02:05,750 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:05,751 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 162 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 3 Unknown, 0 Unchecked, 6.9s Time] [2022-03-19 12:02:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-19 12:02:05,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-03-19 12:02:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 62 states have internal predecessors, (73), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 12:02:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-03-19 12:02:05,762 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 44 [2022-03-19 12:02:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:05,763 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-03-19 12:02:05,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 12:02:05,763 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-03-19 12:02:05,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 12:02:05,763 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:05,763 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-03-19 12:02:05,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 12:02:05,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 12:02:05,965 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:05,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:05,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1195555644, now seen corresponding path program 1 times [2022-03-19 12:02:05,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:05,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1843000307] [2022-03-19 12:02:05,969 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:05,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1195555644, now seen corresponding path program 2 times [2022-03-19 12:02:05,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:05,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533592223] [2022-03-19 12:02:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:05,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:05,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:05,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204059199] [2022-03-19 12:02:05,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:02:05,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:05,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:05,983 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:02:05,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 12:02:06,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:02:06,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:06,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 12:02:06,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 12:02:07,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 12:02:07,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:07,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533592223] [2022-03-19 12:02:07,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:07,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204059199] [2022-03-19 12:02:07,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204059199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:02:07,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:02:07,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 17 [2022-03-19 12:02:07,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:07,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1843000307] [2022-03-19 12:02:07,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1843000307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:07,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:07,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 12:02:07,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751146052] [2022-03-19 12:02:07,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:07,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 12:02:07,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:07,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 12:02:07,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-19 12:02:07,543 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 12:02:08,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:08,470 INFO L93 Difference]: Finished difference Result 113 states and 138 transitions. [2022-03-19 12:02:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 12:02:08,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2022-03-19 12:02:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:08,472 INFO L225 Difference]: With dead ends: 113 [2022-03-19 12:02:08,472 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 12:02:08,472 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-19 12:02:08,476 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:08,477 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 161 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 12:02:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 12:02:08,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2022-03-19 12:02:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 63 states have internal predecessors, (75), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 12:02:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2022-03-19 12:02:08,492 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 45 [2022-03-19 12:02:08,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:08,492 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2022-03-19 12:02:08,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 12:02:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2022-03-19 12:02:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 12:02:08,493 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:08,493 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-03-19 12:02:08,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 12:02:08,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 12:02:08,711 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:08,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1506299306, now seen corresponding path program 3 times [2022-03-19 12:02:08,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:08,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1987888970] [2022-03-19 12:02:08,712 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:08,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1506299306, now seen corresponding path program 4 times [2022-03-19 12:02:08,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:08,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995178236] [2022-03-19 12:02:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:08,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:08,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:08,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879308882] [2022-03-19 12:02:08,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 12:02:08,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:08,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:08,724 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:02:08,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 12:02:08,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 12:02:08,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:08,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 12:02:08,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 12:02:25,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:27,470 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 12:02:38,791 WARN L232 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 60 DAG size of output: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 12:02:49,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:49,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995178236] [2022-03-19 12:02:49,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:49,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879308882] [2022-03-19 12:02:49,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879308882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 12:02:49,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 12:02:49,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 12:02:49,054 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1987888970] [2022-03-19 12:02:49,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1987888970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:49,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:49,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 12:02:49,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647185254] [2022-03-19 12:02:49,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:49,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 12:02:49,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 12:02:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-19 12:02:49,056 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 12:02:52,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:55,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:57,275 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:59,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:03:01,281 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:03:03,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:03:05,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:03:06,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:03:06,288 INFO L93 Difference]: Finished difference Result 120 states and 147 transitions. [2022-03-19 12:03:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 12:03:06,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2022-03-19 12:03:06,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:03:06,290 INFO L225 Difference]: With dead ends: 120 [2022-03-19 12:03:06,290 INFO L226 Difference]: Without dead ends: 102 [2022-03-19 12:03:06,290 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-03-19 12:03:06,291 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 11 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-03-19 12:03:06,291 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 195 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 318 Invalid, 7 Unknown, 12 Unchecked, 15.3s Time] [2022-03-19 12:03:06,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-19 12:03:06,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2022-03-19 12:03:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 12:03:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2022-03-19 12:03:06,305 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 45 [2022-03-19 12:03:06,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:03:06,305 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2022-03-19 12:03:06,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 12:03:06,306 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2022-03-19 12:03:06,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 12:03:06,306 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:03:06,306 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-03-19 12:03:06,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-19 12:03:06,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 12:03:06,507 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:03:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:03:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash -431044891, now seen corresponding path program 1 times [2022-03-19 12:03:06,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:03:06,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [563802898] [2022-03-19 12:03:06,508 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:03:06,508 INFO L85 PathProgramCache]: Analyzing trace with hash -431044891, now seen corresponding path program 2 times [2022-03-19 12:03:06,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:03:06,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746299819] [2022-03-19 12:03:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:03:06,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:03:06,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:03:06,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127834828] [2022-03-19 12:03:06,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:03:06,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:03:06,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:03:06,517 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:03:06,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 12:03:06,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:03:06,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:03:06,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 12:03:06,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:03:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 12:03:08,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:03:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 12:03:08,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:03:08,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746299819] [2022-03-19 12:03:08,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:03:08,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127834828] [2022-03-19 12:03:08,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127834828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:03:08,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:03:08,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2022-03-19 12:03:08,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:03:08,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [563802898] [2022-03-19 12:03:08,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [563802898] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:03:08,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:03:08,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 12:03:08,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207677073] [2022-03-19 12:03:08,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:03:08,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 12:03:08,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:03:08,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 12:03:08,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-19 12:03:08,733 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 12:03:09,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:03:09,056 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2022-03-19 12:03:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 12:03:09,057 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2022-03-19 12:03:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:03:09,059 INFO L225 Difference]: With dead ends: 120 [2022-03-19 12:03:09,059 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 12:03:09,059 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-03-19 12:03:09,060 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 12:03:09,060 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 172 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 12:03:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 12:03:09,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-03-19 12:03:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 12:03:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2022-03-19 12:03:09,079 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 46 [2022-03-19 12:03:09,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:03:09,079 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2022-03-19 12:03:09,080 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 12:03:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2022-03-19 12:03:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 12:03:09,080 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:03:09,080 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-03-19 12:03:09,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 12:03:09,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:03:09,288 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:03:09,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:03:09,289 INFO L85 PathProgramCache]: Analyzing trace with hash -373786589, now seen corresponding path program 1 times [2022-03-19 12:03:09,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:03:09,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1872284538] [2022-03-19 12:03:09,289 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:03:09,289 INFO L85 PathProgramCache]: Analyzing trace with hash -373786589, now seen corresponding path program 2 times [2022-03-19 12:03:09,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:03:09,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857430962] [2022-03-19 12:03:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:03:09,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:03:09,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:03:09,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494252197] [2022-03-19 12:03:09,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:03:09,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:03:09,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:03:09,300 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:03:09,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 12:03:09,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:03:09,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:03:09,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 12:03:09,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:03:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 12:03:10,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:03:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 12:03:10,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:03:10,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857430962] [2022-03-19 12:03:10,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:03:10,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494252197] [2022-03-19 12:03:10,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494252197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:03:10,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:03:10,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 16 [2022-03-19 12:03:10,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:03:10,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1872284538] [2022-03-19 12:03:10,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1872284538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:03:10,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:03:10,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 12:03:10,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972594273] [2022-03-19 12:03:10,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:03:10,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 12:03:10,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:03:10,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 12:03:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-19 12:03:10,591 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 12:03:12,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:03:12,056 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2022-03-19 12:03:12,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 12:03:12,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-03-19 12:03:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:03:12,057 INFO L225 Difference]: With dead ends: 110 [2022-03-19 12:03:12,057 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 12:03:12,058 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-19 12:03:12,058 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 12:03:12,058 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 173 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 12:03:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 12:03:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2022-03-19 12:03:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 77 states have internal predecessors, (87), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 12:03:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2022-03-19 12:03:12,086 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 46 [2022-03-19 12:03:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:03:12,087 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2022-03-19 12:03:12,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 12:03:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2022-03-19 12:03:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 12:03:12,088 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:03:12,088 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-03-19 12:03:12,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 12:03:12,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 12:03:12,301 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:03:12,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:03:12,301 INFO L85 PathProgramCache]: Analyzing trace with hash -160879067, now seen corresponding path program 3 times [2022-03-19 12:03:12,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:03:12,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [923920295] [2022-03-19 12:03:12,301 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:03:12,302 INFO L85 PathProgramCache]: Analyzing trace with hash -160879067, now seen corresponding path program 4 times [2022-03-19 12:03:12,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:03:12,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346457248] [2022-03-19 12:03:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:03:12,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:03:12,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:03:12,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177366877] [2022-03-19 12:03:12,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 12:03:12,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:03:12,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:03:12,312 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:03:12,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 12:03:12,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 12:03:12,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:03:12,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 12:03:12,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:03:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 12:03:13,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:03:28,779 WARN L232 SmtUtils]: Spent 10.79s on a formula simplification. DAG size of input: 47 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 12:03:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 12:03:29,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:03:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346457248] [2022-03-19 12:03:29,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:03:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177366877] [2022-03-19 12:03:29,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177366877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:03:29,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:03:29,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 20 [2022-03-19 12:03:29,398 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:03:29,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [923920295] [2022-03-19 12:03:29,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [923920295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:03:29,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:03:29,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 12:03:29,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402538306] [2022-03-19 12:03:29,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:03:29,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 12:03:29,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:03:29,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 12:03:29,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-19 12:03:29,400 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 12:03:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:03:29,743 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2022-03-19 12:03:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 12:03:29,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2022-03-19 12:03:29,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:03:29,745 INFO L225 Difference]: With dead ends: 129 [2022-03-19 12:03:29,745 INFO L226 Difference]: Without dead ends: 112 [2022-03-19 12:03:29,746 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-03-19 12:03:29,746 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 12:03:29,746 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 171 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 12:03:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-19 12:03:29,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2022-03-19 12:03:29,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 75 states have internal predecessors, (83), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 12:03:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2022-03-19 12:03:29,769 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 46 [2022-03-19 12:03:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:03:29,769 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2022-03-19 12:03:29,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 12:03:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2022-03-19 12:03:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 12:03:29,770 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:03:29,770 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-03-19 12:03:29,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 12:03:29,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 12:03:29,995 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:03:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:03:29,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1171996317, now seen corresponding path program 3 times [2022-03-19 12:03:29,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:03:29,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1899332471] [2022-03-19 12:03:29,996 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:03:29,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1171996317, now seen corresponding path program 4 times [2022-03-19 12:03:29,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:03:29,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136214848] [2022-03-19 12:03:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:03:29,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:03:30,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:03:30,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637379479] [2022-03-19 12:03:30,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 12:03:30,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:03:30,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:03:30,013 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:03:30,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 12:03:30,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 12:03:30,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:03:30,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 12:03:30,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:03:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 12:03:33,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:03:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 12:03:52,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:03:52,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136214848] [2022-03-19 12:03:52,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:03:52,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637379479] [2022-03-19 12:03:52,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637379479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:03:52,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:03:52,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2022-03-19 12:03:52,419 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:03:52,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1899332471] [2022-03-19 12:03:52,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1899332471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:03:52,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:03:52,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 12:03:52,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74844210] [2022-03-19 12:03:52,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:03:52,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 12:03:52,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:03:52,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 12:03:52,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-03-19 12:03:52,421 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 12:03:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:03:53,290 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-03-19 12:03:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 12:03:53,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-03-19 12:03:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:03:53,292 INFO L225 Difference]: With dead ends: 112 [2022-03-19 12:03:53,293 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 12:03:53,293 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-03-19 12:03:53,293 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 12:03:53,294 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 201 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 12:03:53,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 12:03:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 92. [2022-03-19 12:03:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 69 states have internal predecessors, (77), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 12:03:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2022-03-19 12:03:53,314 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 46 [2022-03-19 12:03:53,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:03:53,314 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2022-03-19 12:03:53,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 12:03:53,315 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2022-03-19 12:03:53,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 12:03:53,315 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:03:53,315 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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 12:03:53,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 12:03:53,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 12:03:53,539 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:03:53,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:03:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2079436449, now seen corresponding path program 1 times [2022-03-19 12:03:53,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:03:53,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [946531291] [2022-03-19 12:03:53,540 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:03:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2079436449, now seen corresponding path program 2 times [2022-03-19 12:03:53,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:03:53,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395686193] [2022-03-19 12:03:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:03:53,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:03:53,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:03:53,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794232766] [2022-03-19 12:03:53,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:03:53,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:03:53,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:03:53,548 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:03:53,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 12:03:53,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:03:53,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:03:53,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 12:03:53,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:03:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:03:54,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:03:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 12:03:54,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:03:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395686193] [2022-03-19 12:03:54,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:03:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794232766] [2022-03-19 12:03:54,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794232766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:03:54,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:03:54,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 20 [2022-03-19 12:03:54,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:03:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [946531291] [2022-03-19 12:03:54,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [946531291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:03:54,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:03:54,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 12:03:54,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995201956] [2022-03-19 12:03:54,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:03:54,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 12:03:54,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:03:54,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 12:03:54,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-19 12:03:54,936 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-19 12:03:57,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:03:58,753 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:04:01,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:04:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:04:01,537 INFO L93 Difference]: Finished difference Result 138 states and 171 transitions. [2022-03-19 12:04:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 12:04:01,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 52 [2022-03-19 12:04:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:04:01,538 INFO L225 Difference]: With dead ends: 138 [2022-03-19 12:04:01,538 INFO L226 Difference]: Without dead ends: 114 [2022-03-19 12:04:01,539 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-19 12:04:01,539 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-03-19 12:04:01,540 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 320 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 491 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-03-19 12:04:01,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-19 12:04:01,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2022-03-19 12:04:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 81 states have internal predecessors, (89), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 12:04:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2022-03-19 12:04:01,567 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 52 [2022-03-19 12:04:01,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:04:01,567 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2022-03-19 12:04:01,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-19 12:04:01,567 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2022-03-19 12:04:01,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 12:04:01,568 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:04:01,568 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:04:01,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 12:04:01,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:04:01,783 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:04:01,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:04:01,784 INFO L85 PathProgramCache]: Analyzing trace with hash 967008175, now seen corresponding path program 5 times [2022-03-19 12:04:01,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:04:01,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1527290598] [2022-03-19 12:04:01,784 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:04:01,784 INFO L85 PathProgramCache]: Analyzing trace with hash 967008175, now seen corresponding path program 6 times [2022-03-19 12:04:01,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:04:01,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468400540] [2022-03-19 12:04:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:04:01,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:04:01,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:04:01,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736412933] [2022-03-19 12:04:01,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 12:04:01,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:04:01,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:04:01,792 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:04:01,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 12:04:01,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 12:04:01,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:04:01,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 12:04:01,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:04:01,903 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 12:04:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 12:04:04,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:04:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 12:04:04,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:04:04,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468400540] [2022-03-19 12:04:04,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:04:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736412933] [2022-03-19 12:04:04,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736412933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:04:04,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:04:04,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 12:04:04,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:04:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1527290598] [2022-03-19 12:04:04,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1527290598] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:04:04,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:04:04,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 12:04:04,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533126180] [2022-03-19 12:04:04,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:04:04,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 12:04:04,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:04:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 12:04:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2022-03-19 12:04:04,254 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 12:04:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:04:05,563 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2022-03-19 12:04:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 12:04:05,564 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 53 [2022-03-19 12:04:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:04:05,565 INFO L225 Difference]: With dead ends: 112 [2022-03-19 12:04:05,565 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 12:04:05,565 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=37, Invalid=94, Unknown=1, NotChecked=0, Total=132 [2022-03-19 12:04:05,565 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 12:04:05,566 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 126 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 12:04:05,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 12:04:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-03-19 12:04:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 82 states have internal predecessors, (90), 20 states have call successors, (20), 12 states have call predecessors, (20), 10 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 12:04:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2022-03-19 12:04:05,588 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 53 [2022-03-19 12:04:05,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:04:05,589 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2022-03-19 12:04:05,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 12:04:05,589 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2022-03-19 12:04:05,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 12:04:05,589 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:04:05,590 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:04:05,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 12:04:05,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:04:05,794 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:04:05,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:04:05,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1563197702, now seen corresponding path program 3 times [2022-03-19 12:04:05,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:04:05,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2128999427] [2022-03-19 12:04:05,795 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:04:05,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1563197702, now seen corresponding path program 4 times [2022-03-19 12:04:05,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:04:05,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506272933] [2022-03-19 12:04:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:04:05,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:04:05,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:04:05,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117864205] [2022-03-19 12:04:05,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 12:04:05,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:04:05,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:04:05,803 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:04:05,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 12:04:05,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 12:04:05,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:04:05,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 12:04:05,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:04:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 12:04:06,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:04:06,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:04:06,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506272933] [2022-03-19 12:04:06,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:04:06,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117864205] [2022-03-19 12:04:06,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117864205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 12:04:06,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 12:04:06,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 12:04:06,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:04:06,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2128999427] [2022-03-19 12:04:06,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2128999427] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:04:06,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:04:06,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 12:04:06,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21942980] [2022-03-19 12:04:06,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:04:06,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 12:04:06,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:04:06,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 12:04:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-19 12:04:06,490 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-19 12:04:06,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:04:06,879 INFO L93 Difference]: Finished difference Result 156 states and 193 transitions. [2022-03-19 12:04:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 12:04:06,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 60 [2022-03-19 12:04:06,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:04:06,880 INFO L225 Difference]: With dead ends: 156 [2022-03-19 12:04:06,880 INFO L226 Difference]: Without dead ends: 135 [2022-03-19 12:04:06,881 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-19 12:04:06,881 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 12:04:06,881 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 225 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 328 Invalid, 0 Unknown, 29 Unchecked, 0.3s Time] [2022-03-19 12:04:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-19 12:04:06,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 127. [2022-03-19 12:04:06,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 97 states have internal predecessors, (110), 23 states have call successors, (23), 12 states have call predecessors, (23), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 12:04:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 154 transitions. [2022-03-19 12:04:06,917 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 154 transitions. Word has length 60 [2022-03-19 12:04:06,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:04:06,917 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 154 transitions. [2022-03-19 12:04:06,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-19 12:04:06,917 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 154 transitions. [2022-03-19 12:04:06,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 12:04:06,918 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:04:06,918 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 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 12:04:06,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 12:04:07,125 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 12:04:07,125 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:04:07,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:04:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1755220788, now seen corresponding path program 1 times [2022-03-19 12:04:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:04:07,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [112312472] [2022-03-19 12:04:07,126 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:04:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1755220788, now seen corresponding path program 2 times [2022-03-19 12:04:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:04:07,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025373220] [2022-03-19 12:04:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:04:07,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:04:07,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:04:07,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517531297] [2022-03-19 12:04:07,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:04:07,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:04:07,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:04:07,135 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:04:07,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 12:04:07,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:04:07,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:04:07,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 12:04:07,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:04:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-19 12:04:07,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:04:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 12:04:07,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:04:07,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025373220] [2022-03-19 12:04:07,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:04:07,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517531297] [2022-03-19 12:04:07,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517531297] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 12:04:07,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 12:04:07,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-03-19 12:04:07,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:04:07,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [112312472] [2022-03-19 12:04:07,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [112312472] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:04:07,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:04:07,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 12:04:07,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851789876] [2022-03-19 12:04:07,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:04:07,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 12:04:07,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:04:07,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 12:04:07,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-19 12:04:07,421 INFO L87 Difference]: Start difference. First operand 127 states and 154 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 12:04:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:04:07,490 INFO L93 Difference]: Finished difference Result 173 states and 219 transitions. [2022-03-19 12:04:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 12:04:07,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 61 [2022-03-19 12:04:07,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:04:07,493 INFO L225 Difference]: With dead ends: 173 [2022-03-19 12:04:07,493 INFO L226 Difference]: Without dead ends: 143 [2022-03-19 12:04:07,493 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-19 12:04:07,494 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 12:04:07,494 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 63 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 12:04:07,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-19 12:04:07,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-03-19 12:04:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 105 states have (on average 1.180952380952381) internal successors, (124), 107 states have internal predecessors, (124), 25 states have call successors, (25), 12 states have call predecessors, (25), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 12:04:07,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2022-03-19 12:04:07,538 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 61 [2022-03-19 12:04:07,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:04:07,538 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2022-03-19 12:04:07,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 12:04:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2022-03-19 12:04:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 12:04:07,539 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:04:07,539 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 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 12:04:07,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 12:04:07,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 12:04:07,747 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:04:07,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:04:07,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1988072646, now seen corresponding path program 3 times [2022-03-19 12:04:07,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:04:07,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [61147447] [2022-03-19 12:04:07,748 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:04:07,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1988072646, now seen corresponding path program 4 times [2022-03-19 12:04:07,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:04:07,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522885384] [2022-03-19 12:04:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:04:07,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:04:07,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:04:07,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960232381] [2022-03-19 12:04:07,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 12:04:07,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:04:07,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:04:07,755 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:04:07,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 12:04:07,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 12:04:07,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:04:07,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 12:04:07,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:04:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 12:04:08,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:04:08,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:04:08,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522885384] [2022-03-19 12:04:08,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:04:08,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960232381] [2022-03-19 12:04:08,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960232381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 12:04:08,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 12:04:08,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-19 12:04:08,490 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:04:08,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [61147447] [2022-03-19 12:04:08,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [61147447] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:04:08,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:04:08,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 12:04:08,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967913802] [2022-03-19 12:04:08,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:04:08,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 12:04:08,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:04:08,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 12:04:08,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-19 12:04:08,491 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-19 12:04:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:04:08,939 INFO L93 Difference]: Finished difference Result 153 states and 187 transitions. [2022-03-19 12:04:08,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 12:04:08,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 61 [2022-03-19 12:04:08,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:04:08,940 INFO L225 Difference]: With dead ends: 153 [2022-03-19 12:04:08,940 INFO L226 Difference]: Without dead ends: 148 [2022-03-19 12:04:08,941 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-19 12:04:08,941 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 12:04:08,941 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 200 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 355 Invalid, 0 Unknown, 27 Unchecked, 0.2s Time] [2022-03-19 12:04:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-19 12:04:08,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2022-03-19 12:04:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 105 states have (on average 1.180952380952381) internal successors, (124), 107 states have internal predecessors, (124), 25 states have call successors, (25), 12 states have call predecessors, (25), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 12:04:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2022-03-19 12:04:08,990 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 61 [2022-03-19 12:04:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:04:08,990 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2022-03-19 12:04:08,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-19 12:04:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2022-03-19 12:04:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 12:04:08,991 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:04:08,991 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:04:09,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 12:04:09,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:04:09,203 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:04:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:04:09,204 INFO L85 PathProgramCache]: Analyzing trace with hash 165486739, now seen corresponding path program 5 times [2022-03-19 12:04:09,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:04:09,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [665516181] [2022-03-19 12:04:09,204 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:04:09,204 INFO L85 PathProgramCache]: Analyzing trace with hash 165486739, now seen corresponding path program 6 times [2022-03-19 12:04:09,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:04:09,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790397393] [2022-03-19 12:04:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:04:09,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:04:09,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:04:09,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401692471] [2022-03-19 12:04:09,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 12:04:09,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:04:09,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:04:09,212 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:04:09,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 12:04:09,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 12:04:09,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:04:09,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 12:04:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:04:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 12:04:09,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:04:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-19 12:04:09,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:04:09,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790397393] [2022-03-19 12:04:09,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:04:09,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401692471] [2022-03-19 12:04:09,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401692471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:04:09,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:04:09,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 12:04:09,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:04:09,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [665516181] [2022-03-19 12:04:09,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [665516181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:04:09,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:04:09,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 12:04:09,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276043996] [2022-03-19 12:04:09,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:04:09,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 12:04:09,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:04:09,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 12:04:09,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 12:04:09,590 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 12:04:11,775 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:04:14,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:04:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:04:14,122 INFO L93 Difference]: Finished difference Result 141 states and 172 transitions. [2022-03-19 12:04:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 12:04:14,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 62 [2022-03-19 12:04:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:04:14,122 INFO L225 Difference]: With dead ends: 141 [2022-03-19 12:04:14,122 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 12:04:14,123 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-19 12:04:14,123 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-19 12:04:14,123 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 118 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-03-19 12:04:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 12:04:14,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 12:04:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-19 12:04:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 12:04:14,124 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2022-03-19 12:04:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:04:14,124 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 12:04:14,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 12:04:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 12:04:14,124 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 12:04:14,126 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 12:04:14,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 12:04:14,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:04:14,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 12:09:08,450 WARN L232 SmtUtils]: Spent 4.90m on a formula simplification. DAG size of input: 231 DAG size of output: 234 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-19 12:09:13,909 WARN L232 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 230 DAG size of output: 216 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-19 12:09:31,463 WARN L232 SmtUtils]: Spent 17.33s on a formula simplification. DAG size of input: 208 DAG size of output: 209 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-19 12:09:39,835 WARN L232 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 194 DAG size of output: 85 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 12:09:57,282 WARN L232 SmtUtils]: Spent 17.45s on a formula simplification. DAG size of input: 214 DAG size of output: 53 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 12:10:19,871 WARN L232 SmtUtils]: Spent 22.54s on a formula simplification. DAG size of input: 198 DAG size of output: 79 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 12:10:26,235 WARN L232 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 194 DAG size of output: 85 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 12:10:46,340 WARN L232 SmtUtils]: Spent 20.09s on a formula simplification. DAG size of input: 191 DAG size of output: 55 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 12:11:33,488 WARN L232 SmtUtils]: Spent 47.10s on a formula simplification. DAG size of input: 220 DAG size of output: 90 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 12:11:33,493 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-03-19 12:11:33,493 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-03-19 12:11:33,493 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-03-19 12:11:33,493 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-03-19 12:11:33,493 INFO L878 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-19 12:11:33,493 INFO L878 garLoopResultBuilder]: At program point L9-2(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-19 12:11:33,494 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-19 12:11:33,494 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 5) (<= 1 main_~y~0) (<= main_~y~0 5)) [2022-03-19 12:11:33,494 INFO L885 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: true [2022-03-19 12:11:33,494 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 19 60) the Hoare annotation is: true [2022-03-19 12:11:33,494 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 19 60) the Hoare annotation is: true [2022-03-19 12:11:33,494 INFO L878 garLoopResultBuilder]: At program point L44(lines 44 54) the Hoare annotation is: (let ((.cse3 (<= 0 main_~x~0)) (.cse4 (<= main_~x~0 5)) (.cse5 (not (= main_~a~0 0))) (.cse6 (<= 1 main_~y~0)) (.cse7 (<= main_~y~0 5))) (or (let ((.cse1 (* main_~y~0 main_~x~0))) (let ((.cse0 (div main_~p~0 4)) (.cse2 (+ .cse1 (* (- 1) main_~q~0)))) (and (= (mod main_~p~0 4) 0) (= (mod (+ (* main_~q~0 3) (* .cse0 main_~b~0 main_~a~0 (- 4)) .cse1) 4) 0) (= (* .cse0 main_~b~0 main_~a~0) (div .cse2 4)) .cse3 .cse4 (= (mod .cse2 (* main_~b~0 main_~a~0)) 0) (not (= main_~b~0 0)) .cse5 .cse6 .cse7))) (and (or (not (= (mod main_~b~0 2) 0)) (not (= (mod main_~a~0 2) 0))) .cse3 .cse4 (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse5 .cse6 (= main_~a~0 main_~x~0) .cse7 (= main_~p~0 1)))) [2022-03-19 12:11:33,494 INFO L878 garLoopResultBuilder]: At program point L40(lines 40 54) the Hoare annotation is: (let ((.cse5 (not (= main_~b~0 0))) (.cse1 (* main_~y~0 main_~x~0)) (.cse3 (<= 0 main_~x~0)) (.cse4 (<= main_~x~0 5)) (.cse14 (= main_~b~0 main_~y~0)) (.cse6 (not (= main_~a~0 0))) (.cse7 (<= 1 main_~y~0)) (.cse11 (= main_~a~0 main_~x~0)) (.cse8 (<= main_~y~0 5)) (.cse12 (= main_~p~0 1))) (or (let ((.cse0 (div main_~p~0 4)) (.cse2 (+ .cse1 (* (- 1) main_~q~0)))) (and (= (mod main_~p~0 4) 0) (= (mod (+ (* main_~q~0 3) (* .cse0 main_~b~0 main_~a~0 (- 4)) .cse1) 4) 0) (= (* .cse0 main_~b~0 main_~a~0) (div .cse2 4)) .cse3 .cse4 (= (mod .cse2 (* main_~b~0 main_~a~0)) 0) .cse5 .cse6 .cse7 .cse8)) (and (let ((.cse9 (mod main_~y~0 2)) (.cse10 (= (+ main_~b~0 1) main_~y~0)) (.cse13 (+ main_~a~0 1))) (or (and (<= 1 .cse9) (= (mod main_~a~0 2) 0) .cse5 .cse6 .cse10 .cse11 .cse12) (and (not (= .cse9 0)) (not (= (mod .cse13 2) 0)) .cse5 (= main_~q~0 (+ (* main_~b~0 main_~p~0) (* main_~a~0 main_~p~0) main_~p~0)) .cse6 .cse10 .cse12) (and (<= 1 (mod main_~x~0 2)) (= (mod main_~b~0 2) 0) .cse14 (= .cse13 main_~x~0) .cse6 .cse12))) .cse3 (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse1) .cse4 .cse7 .cse8) (and .cse3 .cse4 .cse14 (= main_~q~0 0) .cse6 .cse7 .cse11 .cse8 .cse12))) [2022-03-19 12:11:33,494 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 55) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (<= main_~x~0 5)) (.cse2 (= main_~q~0 (* main_~y~0 main_~x~0))) (.cse3 (<= 1 main_~y~0)) (.cse4 (= (* main_~b~0 main_~a~0) 0)) (.cse5 (<= main_~y~0 5))) (or (and .cse0 .cse1 .cse2 (<= main_~x~0 (+ main_~a~0 1)) .cse3 .cse4 (<= main_~y~0 (+ main_~b~0 1)) .cse5) (and .cse0 .cse1 .cse2 (not (= main_~a~0 0)) .cse3 .cse4 .cse5) (and (not (= (mod (div main_~x~0 2) 2) 0)) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (= (mod main_~x~0 2) 0)) (and .cse0 .cse1 .cse2 (not (= main_~b~0 0)) .cse3 .cse4 .cse5) (and (= (mod main_~p~0 4) 0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5))) [2022-03-19 12:11:33,494 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 60) the Hoare annotation is: true [2022-03-19 12:11:33,495 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 5)) [2022-03-19 12:11:33,495 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 0 main_~x~0) (<= main_~x~0 5) (<= main_~y~0 5)) [2022-03-19 12:11:33,495 INFO L878 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 5) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0) (<= main_~y~0 5)) [2022-03-19 12:11:33,495 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-03-19 12:11:33,495 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 5)) [2022-03-19 12:11:33,495 INFO L878 garLoopResultBuilder]: At program point L47(lines 47 54) the Hoare annotation is: (let ((.cse3 (<= 0 main_~x~0)) (.cse4 (<= main_~x~0 5)) (.cse5 (not (= main_~a~0 0))) (.cse6 (<= 1 main_~y~0)) (.cse7 (<= main_~y~0 5))) (or (let ((.cse1 (* main_~y~0 main_~x~0))) (let ((.cse0 (div main_~p~0 4)) (.cse2 (+ .cse1 (* (- 1) main_~q~0)))) (and (= (mod main_~p~0 4) 0) (= (mod (+ (* main_~q~0 3) (* .cse0 main_~b~0 main_~a~0 (- 4)) .cse1) 4) 0) (= (* .cse0 main_~b~0 main_~a~0) (div .cse2 4)) .cse3 .cse4 (= (mod .cse2 (* main_~b~0 main_~a~0)) 0) (not (= main_~b~0 0)) .cse5 .cse6 .cse7))) (and (not (= (mod main_~b~0 2) 0)) .cse3 .cse4 (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse5 .cse6 (= main_~a~0 main_~x~0) .cse7 (= main_~p~0 1)))) [2022-03-19 12:11:33,495 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 34 55) the Hoare annotation is: (let ((.cse4 (= main_~a~0 main_~x~0)) (.cse12 (* main_~b~0 main_~p~0)) (.cse10 (mod main_~x~0 2)) (.cse2 (= main_~b~0 main_~y~0)) (.cse7 (+ main_~a~0 1)) (.cse6 (= main_~p~0 1)) (.cse9 (* main_~y~0 main_~x~0)) (.cse0 (<= 0 main_~x~0)) (.cse1 (<= main_~x~0 5)) (.cse3 (<= 1 main_~y~0)) (.cse5 (<= main_~y~0 5))) (or (and .cse0 .cse1 .cse2 (= main_~q~0 0) .cse3 .cse4 .cse5 .cse6) (let ((.cse8 (div main_~x~0 2))) (and (= .cse7 .cse8) (not (= (mod .cse8 2) 0)) .cse0 .cse1 (= main_~q~0 .cse9) (not (= main_~b~0 0)) .cse3 .cse5 (= .cse10 0))) (and .cse0 (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse9) .cse1 (let ((.cse11 (mod main_~y~0 2)) (.cse13 (= (+ main_~b~0 1) main_~y~0))) (or (and (not (= .cse11 0)) (not (= (mod .cse7 2) 0)) (= main_~q~0 (+ .cse12 (* main_~a~0 main_~p~0) main_~p~0)) .cse13 .cse6) (and (<= 1 .cse11) (= (mod main_~a~0 2) 0) (not (= main_~a~0 0)) .cse13 .cse4 .cse6))) .cse3 .cse5) (and (= .cse12 main_~q~0) (<= 1 .cse10) (= (mod main_~b~0 2) 0) .cse1 .cse2 (= .cse7 main_~x~0) (< 0 (+ (div main_~a~0 2) 1)) .cse3 .cse5 .cse6) (let ((.cse14 (div main_~p~0 4))) (and (= (mod main_~p~0 4) 0) (= (mod (+ (* main_~q~0 3) (* .cse14 main_~b~0 main_~a~0 (- 4)) .cse9) 4) 0) (= (* .cse14 main_~b~0 main_~a~0) (div (+ .cse9 (* (- 1) main_~q~0)) 4)) .cse0 .cse1 .cse3 .cse5)))) [2022-03-19 12:11:33,495 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse4 (= main_~a~0 main_~x~0)) (.cse12 (* main_~b~0 main_~p~0)) (.cse10 (mod main_~x~0 2)) (.cse2 (= main_~b~0 main_~y~0)) (.cse7 (+ main_~a~0 1)) (.cse6 (= main_~p~0 1)) (.cse9 (* main_~y~0 main_~x~0)) (.cse0 (<= 0 main_~x~0)) (.cse1 (<= main_~x~0 5)) (.cse3 (<= 1 main_~y~0)) (.cse5 (<= main_~y~0 5))) (or (and .cse0 .cse1 .cse2 (= main_~q~0 0) .cse3 .cse4 .cse5 .cse6) (let ((.cse8 (div main_~x~0 2))) (and (= .cse7 .cse8) (not (= (mod .cse8 2) 0)) .cse0 .cse1 (= main_~q~0 .cse9) (not (= main_~b~0 0)) .cse3 .cse5 (= .cse10 0))) (and .cse0 (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse9) .cse1 (let ((.cse11 (mod main_~y~0 2)) (.cse13 (= (+ main_~b~0 1) main_~y~0))) (or (and (not (= .cse11 0)) (not (= (mod .cse7 2) 0)) (= main_~q~0 (+ .cse12 (* main_~a~0 main_~p~0) main_~p~0)) .cse13 .cse6) (and (<= 1 .cse11) (= (mod main_~a~0 2) 0) (not (= main_~a~0 0)) .cse13 .cse4 .cse6))) .cse3 .cse5) (and (= .cse12 main_~q~0) (<= 1 .cse10) (= (mod main_~b~0 2) 0) .cse1 .cse2 (= .cse7 main_~x~0) (< 0 (+ (div main_~a~0 2) 1)) .cse3 .cse5 .cse6) (let ((.cse14 (div main_~p~0 4))) (and (= (mod main_~p~0 4) 0) (= (mod (+ (* main_~q~0 3) (* .cse14 main_~b~0 main_~a~0 (- 4)) .cse9) 4) 0) (= (* .cse14 main_~b~0 main_~a~0) (div (+ .cse9 (* (- 1) main_~q~0)) 4)) .cse0 .cse1 .cse3 .cse5)))) [2022-03-19 12:11:33,496 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 34 55) the Hoare annotation is: (let ((.cse12 (* main_~y~0 main_~x~0))) (let ((.cse9 (= main_~q~0 .cse12)) (.cse10 (mod main_~x~0 2)) (.cse2 (= main_~b~0 main_~y~0)) (.cse7 (+ main_~a~0 1)) (.cse4 (= main_~a~0 main_~x~0)) (.cse6 (= main_~p~0 1)) (.cse0 (<= 0 main_~x~0)) (.cse1 (<= main_~x~0 5)) (.cse3 (<= 1 main_~y~0)) (.cse5 (<= main_~y~0 5))) (or (and .cse0 .cse1 .cse2 (= main_~q~0 0) .cse3 .cse4 .cse5 .cse6) (let ((.cse8 (div main_~x~0 2))) (and (= .cse7 .cse8) (not (= (mod .cse8 2) 0)) .cse0 .cse1 .cse9 (not (= main_~b~0 0)) .cse3 .cse5 (= .cse10 0))) (let ((.cse11 (div main_~p~0 4)) (.cse13 (+ .cse12 (* (- 1) main_~q~0)))) (and (= (mod main_~p~0 4) 0) (= (mod (+ (* main_~q~0 3) (* .cse11 main_~b~0 main_~a~0 (- 4)) .cse12) 4) 0) (= (* .cse11 main_~b~0 main_~a~0) (div .cse13 4)) .cse0 .cse1 (or (= (mod .cse13 (* main_~b~0 main_~a~0)) 0) .cse9) .cse3 .cse5)) (and (let ((.cse14 (mod main_~y~0 2)) (.cse15 (= (+ main_~b~0 1) main_~y~0))) (or (and (not (= .cse14 0)) (not (= (mod .cse7 2) 0)) (= main_~q~0 (+ (* main_~b~0 main_~p~0) (* main_~a~0 main_~p~0) main_~p~0)) .cse15 .cse6) (and (<= 1 .cse10) (= (mod main_~b~0 2) 0) .cse2 (= .cse7 main_~x~0) .cse6) (and (<= 1 .cse14) (= (mod main_~a~0 2) 0) (not (= main_~a~0 0)) .cse15 .cse4 .cse6))) .cse0 (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse12) .cse1 .cse3 .cse5)))) [2022-03-19 12:11:33,496 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-19 12:11:33,496 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-19 12:11:33,496 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-19 12:11:33,496 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-19 12:11:33,496 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-19 12:11:33,496 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 12:11:33,496 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-19 12:11:33,496 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-19 12:11:33,496 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 12:11:33,496 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 15) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 12:11:33,496 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 12:11:33,496 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 12:11:33,496 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 12:11:33,499 INFO L718 BasicCegarLoop]: Path program histogram: [6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-19 12:11:33,500 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 12:11:33,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 12:11:33 BoogieIcfgContainer [2022-03-19 12:11:33,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 12:11:33,517 INFO L158 Benchmark]: Toolchain (without parser) took 608439.84ms. Allocated memory was 169.9MB in the beginning and 260.0MB in the end (delta: 90.2MB). Free memory was 118.7MB in the beginning and 199.3MB in the end (delta: -80.7MB). Peak memory consumption was 130.1MB. Max. memory is 8.0GB. [2022-03-19 12:11:33,518 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 169.9MB. Free memory is still 135.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 12:11:33,518 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.47ms. Allocated memory is still 169.9MB. Free memory was 118.5MB in the beginning and 145.6MB in the end (delta: -27.1MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-03-19 12:11:33,518 INFO L158 Benchmark]: Boogie Preprocessor took 30.57ms. Allocated memory is still 169.9MB. Free memory was 145.6MB in the beginning and 144.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 12:11:33,518 INFO L158 Benchmark]: RCFGBuilder took 269.72ms. Allocated memory is still 169.9MB. Free memory was 144.0MB in the beginning and 133.2MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-19 12:11:33,519 INFO L158 Benchmark]: TraceAbstraction took 607898.49ms. Allocated memory was 169.9MB in the beginning and 260.0MB in the end (delta: 90.2MB). Free memory was 132.7MB in the beginning and 199.3MB in the end (delta: -66.6MB). Peak memory consumption was 143.4MB. Max. memory is 8.0GB. [2022-03-19 12:11:33,520 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 169.9MB. Free memory is still 135.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 235.47ms. Allocated memory is still 169.9MB. Free memory was 118.5MB in the beginning and 145.6MB in the end (delta: -27.1MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.57ms. Allocated memory is still 169.9MB. Free memory was 145.6MB in the beginning and 144.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 269.72ms. Allocated memory is still 169.9MB. Free memory was 144.0MB in the beginning and 133.2MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 607898.49ms. Allocated memory was 169.9MB in the beginning and 260.0MB in the end (delta: 90.2MB). Free memory was 132.7MB in the beginning and 199.3MB in the end (delta: -66.6MB). Peak memory consumption was 143.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 607.8s, OverallIterations: 24, TraceHistogramMax: 5, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 53.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 439.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 18 mSolverCounterUnknown, 789 SdHoareTripleChecker+Valid, 49.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 723 mSDsluCounter, 3742 SdHoareTripleChecker+Invalid, 48.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 68 IncrementalHoareTripleChecker+Unchecked, 3146 mSDsCounter, 272 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5117 IncrementalHoareTripleChecker+Invalid, 5475 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 272 mSolverCounterUnsat, 596 mSDtfsCounter, 5117 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1963 GetRequests, 1544 SyntacticMatches, 33 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 46.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=22, InterpolantAutomatonStates: 285, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 24 MinimizatonAttempts, 120 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 34 LocationsWithAnnotation, 452 PreInvPairs, 671 NumberOfFragments, 1466 HoareAnnotationTreeSize, 452 FomulaSimplifications, 315015 FormulaSimplificationTreeSizeReduction, 319.6s HoareSimplificationTime, 34 FomulaSimplificationsInter, 6328364 FormulaSimplificationTreeSizeReductionInter, 119.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((((0 <= x && x <= 5) && b == y) && q == 0) && 1 <= y) && a == x) && y <= 5) && p == 1) || ((((((((a + 1 == x / 2 && !(x / 2 % 2 == 0)) && 0 <= x) && x <= 5) && q == y * x) && !(b == 0)) && 1 <= y) && y <= 5) && x % 2 == 0)) || (((((0 <= x && q + b * a * p == y * x) && x <= 5) && (((((!(y % 2 == 0) && !((a + 1) % 2 == 0)) && q == b * p + a * p + p) && b + 1 == y) && p == 1) || (((((1 <= y % 2 && a % 2 == 0) && !(a == 0)) && b + 1 == y) && a == x) && p == 1))) && 1 <= y) && y <= 5)) || (((((((((b * p == q && 1 <= x % 2) && b % 2 == 0) && x <= 5) && b == y) && a + 1 == x) && 0 < a / 2 + 1) && 1 <= y) && y <= 5) && p == 1)) || ((((((p % 4 == 0 && (q * 3 + p / 4 * b * a * -4 + y * x) % 4 == 0) && p / 4 * b * a == (y * x + -1 * q) / 4) && 0 <= x) && x <= 5) && 1 <= y) && y <= 5) - ProcedureContractResult [Line: 8]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 19]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-19 12:11:33,635 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...