/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/egcd3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 22:39:24,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 22:39:24,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 22:39:24,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 22:39:24,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 22:39:24,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 22:39:24,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 22:39:24,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 22:39:24,814 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 22:39:24,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 22:39:24,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 22:39:24,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 22:39:24,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 22:39:24,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 22:39:24,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 22:39:24,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 22:39:24,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 22:39:24,817 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 22:39:24,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 22:39:24,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 22:39:24,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 22:39:24,818 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 22:39:24,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 22:39:24,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:39:24,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 22:39:24,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 22:39:24,818 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 22:39:24,818 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 22:39:24,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 22:39:24,819 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 22:39:24,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 22:39:25,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 22:39:25,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 22:39:25,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 22:39:25,039 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 22:39:25,039 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 22:39:25,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-04-06 22:39:25,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197d5361b/cd3fee7623f84169b771b36e2d73c0e6/FLAG7eb5eda48 [2022-04-06 22:39:25,419 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 22:39:25,419 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-04-06 22:39:25,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197d5361b/cd3fee7623f84169b771b36e2d73c0e6/FLAG7eb5eda48 [2022-04-06 22:39:25,824 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197d5361b/cd3fee7623f84169b771b36e2d73c0e6 [2022-04-06 22:39:25,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 22:39:25,826 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 22:39:25,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 22:39:25,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 22:39:25,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 22:39:25,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:39:25" (1/1) ... [2022-04-06 22:39:25,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fe6e545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:39:25, skipping insertion in model container [2022-04-06 22:39:25,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:39:25" (1/1) ... [2022-04-06 22:39:25,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 22:39:25,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 22:39:25,978 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/egcd3-ll_unwindbound5.c[490,503] [2022-04-06 22:39:25,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:39:26,009 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 22:39:26,059 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/egcd3-ll_unwindbound5.c[490,503] [2022-04-06 22:39:26,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:39:26,085 INFO L208 MainTranslator]: Completed translation [2022-04-06 22:39:26,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:39:26 WrapperNode [2022-04-06 22:39:26,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 22:39:26,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 22:39:26,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 22:39:26,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 22:39:26,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:39:26" (1/1) ... [2022-04-06 22:39:26,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:39:26" (1/1) ... [2022-04-06 22:39:26,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:39:26" (1/1) ... [2022-04-06 22:39:26,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:39:26" (1/1) ... [2022-04-06 22:39:26,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:39:26" (1/1) ... [2022-04-06 22:39:26,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:39:26" (1/1) ... [2022-04-06 22:39:26,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:39:26" (1/1) ... [2022-04-06 22:39:26,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 22:39:26,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 22:39:26,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 22:39:26,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 22:39:26,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:39:26" (1/1) ... [2022-04-06 22:39:26,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:39:26,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:26,164 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) [2022-04-06 22:39:26,188 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 [2022-04-06 22:39:26,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 22:39:26,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 22:39:26,210 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 22:39:26,211 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 22:39:26,211 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 22:39:26,212 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 22:39:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 22:39:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 22:39:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 22:39:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 22:39:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 22:39:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 22:39:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 22:39:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 22:39:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 22:39:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 22:39:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 22:39:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 22:39:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 22:39:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 22:39:26,286 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 22:39:26,287 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 22:39:26,400 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 22:39:26,405 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 22:39:26,405 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 22:39:26,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:39:26 BoogieIcfgContainer [2022-04-06 22:39:26,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 22:39:26,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 22:39:26,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 22:39:26,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 22:39:26,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:39:25" (1/3) ... [2022-04-06 22:39:26,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64051498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:39:26, skipping insertion in model container [2022-04-06 22:39:26,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:39:26" (2/3) ... [2022-04-06 22:39:26,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64051498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:39:26, skipping insertion in model container [2022-04-06 22:39:26,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:39:26" (3/3) ... [2022-04-06 22:39:26,413 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2022-04-06 22:39:26,417 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 22:39:26,417 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 22:39:26,464 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 22:39:26,473 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 [2022-04-06 22:39:26,474 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 22:39:26,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 22:39:26,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 22:39:26,492 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:26,493 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:26,494 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:26,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:26,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2022-04-06 22:39:26,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:26,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1055013412] [2022-04-06 22:39:26,521 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:26,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 2 times [2022-04-06 22:39:26,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:26,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919861594] [2022-04-06 22:39:26,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:26,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:39:26,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 22:39:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:39:26,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 22:39:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:39:26,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 22:39:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:39:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:26,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:26,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919861594] [2022-04-06 22:39:26,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919861594] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:26,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:26,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:39:26,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:26,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1055013412] [2022-04-06 22:39:26,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1055013412] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:26,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:26,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:39:26,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758113160] [2022-04-06 22:39:26,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:26,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 22:39:26,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:26,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 22:39:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 22:39:26,711 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:26,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:26,810 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-04-06 22:39:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 22:39:26,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 22:39:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:26,818 INFO L225 Difference]: With dead ends: 74 [2022-04-06 22:39:26,818 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 22:39:26,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 22:39:26,826 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:26,828 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:39:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 22:39:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-06 22:39:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 22:39:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-04-06 22:39:26,876 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-04-06 22:39:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:26,876 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-04-06 22:39:26,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:26,877 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-04-06 22:39:26,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 22:39:26,878 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:26,878 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:26,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 22:39:26,879 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:26,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:26,879 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2022-04-06 22:39:26,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:26,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1704056179] [2022-04-06 22:39:26,881 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:26,881 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 2 times [2022-04-06 22:39:26,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:26,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8574457] [2022-04-06 22:39:26,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:26,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:26,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:26,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524013689] [2022-04-06 22:39:26,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:26,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:26,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:26,903 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) [2022-04-06 22:39:26,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 22:39:26,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 22:39:26,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:26,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 22:39:26,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:27,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:39:27,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:27,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8574457] [2022-04-06 22:39:27,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:27,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524013689] [2022-04-06 22:39:27,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524013689] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:27,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:27,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 22:39:27,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:27,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1704056179] [2022-04-06 22:39:27,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1704056179] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:27,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:27,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 22:39:27,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000591752] [2022-04-06 22:39:27,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:27,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 22:39:27,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:27,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 22:39:27,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 22:39:27,111 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:27,140 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-04-06 22:39:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 22:39:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 22:39:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:27,144 INFO L225 Difference]: With dead ends: 44 [2022-04-06 22:39:27,144 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 22:39:27,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 22:39:27,145 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:27,146 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:39:27,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 22:39:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 22:39:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 22:39:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-04-06 22:39:27,158 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-04-06 22:39:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:27,160 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-04-06 22:39:27,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-04-06 22:39:27,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 22:39:27,162 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:27,162 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:27,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 22:39:27,363 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 [2022-04-06 22:39:27,363 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:27,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2022-04-06 22:39:27,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:27,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282711646] [2022-04-06 22:39:27,366 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:27,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 2 times [2022-04-06 22:39:27,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:27,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300993903] [2022-04-06 22:39:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:27,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:27,381 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:27,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995968389] [2022-04-06 22:39:27,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:27,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:27,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:27,383 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) [2022-04-06 22:39:27,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 22:39:27,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 22:39:27,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:27,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 22:39:27,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:27,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:39:27,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:27,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300993903] [2022-04-06 22:39:27,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:27,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995968389] [2022-04-06 22:39:27,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995968389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:27,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:27,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:39:27,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:27,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282711646] [2022-04-06 22:39:27,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282711646] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:27,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:27,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:39:27,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795314010] [2022-04-06 22:39:27,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:27,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:39:27,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:27,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:39:27,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:39:27,648 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 22:39:27,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:27,763 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-04-06 22:39:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:39:27,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-04-06 22:39:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:27,767 INFO L225 Difference]: With dead ends: 57 [2022-04-06 22:39:27,767 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 22:39:27,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:39:27,777 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 18 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:27,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 172 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:39:27,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 22:39:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-04-06 22:39:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 22:39:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-04-06 22:39:27,792 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 24 [2022-04-06 22:39:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:27,793 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-04-06 22:39:27,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 22:39:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-04-06 22:39:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 22:39:27,794 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:27,794 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:27,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:28,016 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 [2022-04-06 22:39:28,016 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:28,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2022-04-06 22:39:28,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:28,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [694720196] [2022-04-06 22:39:28,018 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:28,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 2 times [2022-04-06 22:39:28,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:28,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492497971] [2022-04-06 22:39:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:28,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:28,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:28,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085472481] [2022-04-06 22:39:28,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:28,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:28,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:28,035 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) [2022-04-06 22:39:28,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 22:39:28,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:28,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:28,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 22:39:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:28,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:39:28,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:28,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492497971] [2022-04-06 22:39:28,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:28,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085472481] [2022-04-06 22:39:28,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085472481] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:28,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:28,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:39:28,196 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:28,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [694720196] [2022-04-06 22:39:28,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [694720196] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:28,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:28,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:39:28,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827095124] [2022-04-06 22:39:28,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:28,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:39:28,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:28,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:39:28,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:39:28,202 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:28,225 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2022-04-06 22:39:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:39:28,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-04-06 22:39:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:28,227 INFO L225 Difference]: With dead ends: 77 [2022-04-06 22:39:28,227 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 22:39:28,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:39:28,228 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:28,229 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:39:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 22:39:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 22:39:28,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 22:39:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-04-06 22:39:28,242 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-04-06 22:39:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:28,242 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-04-06 22:39:28,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:28,243 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-04-06 22:39:28,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 22:39:28,243 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:28,243 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:28,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:28,444 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 [2022-04-06 22:39:28,444 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:28,444 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2022-04-06 22:39:28,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:28,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [204367563] [2022-04-06 22:39:28,445 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:28,445 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 2 times [2022-04-06 22:39:28,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:28,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569252167] [2022-04-06 22:39:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:28,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:28,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:28,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905297656] [2022-04-06 22:39:28,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:28,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:28,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:28,473 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) [2022-04-06 22:39:28,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 22:39:28,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:28,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:28,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:39:28,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:28,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:39:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:28,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:28,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569252167] [2022-04-06 22:39:28,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:28,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905297656] [2022-04-06 22:39:28,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905297656] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:39:28,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:39:28,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-06 22:39:28,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:28,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [204367563] [2022-04-06 22:39:28,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [204367563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:28,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:28,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:39:28,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570394501] [2022-04-06 22:39:28,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:28,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:39:28,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:39:28,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:39:28,717 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:28,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:28,754 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2022-04-06 22:39:28,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 22:39:28,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-04-06 22:39:28,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:28,757 INFO L225 Difference]: With dead ends: 67 [2022-04-06 22:39:28,757 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 22:39:28,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:39:28,759 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:28,759 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 141 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:39:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 22:39:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-04-06 22:39:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 22:39:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2022-04-06 22:39:28,785 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2022-04-06 22:39:28,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:28,785 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2022-04-06 22:39:28,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2022-04-06 22:39:28,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 22:39:28,788 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:28,788 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 22:39:28,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:29,009 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 [2022-04-06 22:39:29,010 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:29,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:29,010 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2022-04-06 22:39:29,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:29,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [212907817] [2022-04-06 22:39:29,011 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:29,011 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 2 times [2022-04-06 22:39:29,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:29,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552515407] [2022-04-06 22:39:29,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:29,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:29,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:29,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279660412] [2022-04-06 22:39:29,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:29,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:29,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:29,034 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) [2022-04-06 22:39:29,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 22:39:29,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:29,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:29,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:39:29,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 22:39:29,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:39:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 22:39:29,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:29,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552515407] [2022-04-06 22:39:29,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:29,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279660412] [2022-04-06 22:39:29,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279660412] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:39:29,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:39:29,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 22:39:29,263 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:29,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [212907817] [2022-04-06 22:39:29,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [212907817] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:29,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:29,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:39:29,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023604037] [2022-04-06 22:39:29,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:29,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:39:29,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:29,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:39:29,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:39:29,265 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:29,463 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2022-04-06 22:39:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:39:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-04-06 22:39:29,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:29,465 INFO L225 Difference]: With dead ends: 138 [2022-04-06 22:39:29,465 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 22:39:29,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:39:29,467 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 115 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:29,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 304 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:39:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 22:39:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2022-04-06 22:39:29,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 22:39:29,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2022-04-06 22:39:29,504 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2022-04-06 22:39:29,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:29,505 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2022-04-06 22:39:29,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2022-04-06 22:39:29,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 22:39:29,511 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:29,511 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2022-04-06 22:39:29,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:29,731 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 [2022-04-06 22:39:29,731 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:29,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 1 times [2022-04-06 22:39:29,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:29,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [52316943] [2022-04-06 22:39:29,733 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:29,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 2 times [2022-04-06 22:39:29,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:29,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343506248] [2022-04-06 22:39:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:29,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:29,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:29,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022070044] [2022-04-06 22:39:29,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:29,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:29,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:29,756 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) [2022-04-06 22:39:29,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 22:39:29,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:29,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:29,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:39:29,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:29,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:39:29,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:29,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343506248] [2022-04-06 22:39:29,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:29,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022070044] [2022-04-06 22:39:29,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022070044] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:29,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:29,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:39:29,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:29,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [52316943] [2022-04-06 22:39:29,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [52316943] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:29,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:29,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:39:29,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53099009] [2022-04-06 22:39:29,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:29,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:39:29,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:29,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:39:29,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:39:29,881 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:29,909 INFO L93 Difference]: Finished difference Result 127 states and 178 transitions. [2022-04-06 22:39:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:39:29,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-04-06 22:39:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:29,910 INFO L225 Difference]: With dead ends: 127 [2022-04-06 22:39:29,910 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 22:39:29,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:39:29,911 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 16 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:29,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 115 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:39:29,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 22:39:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-04-06 22:39:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 69 states have internal predecessors, (92), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 22:39:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 124 transitions. [2022-04-06 22:39:29,923 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 124 transitions. Word has length 35 [2022-04-06 22:39:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:29,924 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 124 transitions. [2022-04-06 22:39:29,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 124 transitions. [2022-04-06 22:39:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 22:39:29,924 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:29,924 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:29,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 22:39:30,146 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 [2022-04-06 22:39:30,147 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:30,147 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 1 times [2022-04-06 22:39:30,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:30,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1330802792] [2022-04-06 22:39:30,148 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 2 times [2022-04-06 22:39:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:30,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405493304] [2022-04-06 22:39:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:30,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:30,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:30,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040168531] [2022-04-06 22:39:30,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:30,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:30,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:30,161 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) [2022-04-06 22:39:30,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 22:39:30,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:30,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:30,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 22:39:30,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:30,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:39:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:30,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:30,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405493304] [2022-04-06 22:39:30,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:30,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040168531] [2022-04-06 22:39:30,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040168531] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:39:30,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:39:30,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-04-06 22:39:30,391 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:30,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1330802792] [2022-04-06 22:39:30,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1330802792] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:30,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:30,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:39:30,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127497178] [2022-04-06 22:39:30,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:30,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:39:30,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:30,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:39:30,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:39:30,393 INFO L87 Difference]: Start difference. First operand 90 states and 124 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:30,449 INFO L93 Difference]: Finished difference Result 163 states and 227 transitions. [2022-04-06 22:39:30,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 22:39:30,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-04-06 22:39:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:30,450 INFO L225 Difference]: With dead ends: 163 [2022-04-06 22:39:30,450 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 22:39:30,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:39:30,451 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 41 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:30,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 164 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:39:30,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 22:39:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-04-06 22:39:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 22:39:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2022-04-06 22:39:30,469 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 36 [2022-04-06 22:39:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:30,470 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2022-04-06 22:39:30,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2022-04-06 22:39:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 22:39:30,471 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:30,472 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:30,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:30,695 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 [2022-04-06 22:39:30,696 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:30,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:30,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2022-04-06 22:39:30,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:30,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1189405847] [2022-04-06 22:39:30,697 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:30,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 2 times [2022-04-06 22:39:30,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:30,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715661484] [2022-04-06 22:39:30,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:30,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:30,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:30,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941129516] [2022-04-06 22:39:30,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:30,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:30,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:30,715 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) [2022-04-06 22:39:30,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 22:39:30,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:30,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:30,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 22:39:30,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 22:39:30,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:39:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:31,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:31,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715661484] [2022-04-06 22:39:31,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:31,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941129516] [2022-04-06 22:39:31,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941129516] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:39:31,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:39:31,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-04-06 22:39:31,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:31,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1189405847] [2022-04-06 22:39:31,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1189405847] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:31,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:31,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:39:31,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64733709] [2022-04-06 22:39:31,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:31,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:39:31,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:31,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:39:31,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 22:39:31,093 INFO L87 Difference]: Start difference. First operand 109 states and 147 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:31,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:31,230 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2022-04-06 22:39:31,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:39:31,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-04-06 22:39:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:31,232 INFO L225 Difference]: With dead ends: 154 [2022-04-06 22:39:31,232 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 22:39:31,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 22:39:31,234 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 66 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:31,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 313 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:39:31,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 22:39:31,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2022-04-06 22:39:31,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 22:39:31,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2022-04-06 22:39:31,252 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2022-04-06 22:39:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:31,253 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2022-04-06 22:39:31,254 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2022-04-06 22:39:31,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 22:39:31,254 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:31,254 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:31,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:31,467 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 [2022-04-06 22:39:31,468 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:31,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:31,468 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 3 times [2022-04-06 22:39:31,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:31,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2014637108] [2022-04-06 22:39:31,469 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:31,469 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 4 times [2022-04-06 22:39:31,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:31,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081797807] [2022-04-06 22:39:31,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:31,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:31,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:31,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262756709] [2022-04-06 22:39:31,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:39:31,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:31,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:31,482 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) [2022-04-06 22:39:31,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 22:39:31,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:39:31,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:31,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 22:39:31,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:31,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:39:31,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:31,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081797807] [2022-04-06 22:39:31,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:31,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262756709] [2022-04-06 22:39:31,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262756709] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:31,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:31,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:39:31,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:31,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2014637108] [2022-04-06 22:39:31,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2014637108] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:31,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:31,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:39:31,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009382554] [2022-04-06 22:39:31,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:31,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:39:31,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:31,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:39:31,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:39:31,583 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 22:39:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:31,678 INFO L93 Difference]: Finished difference Result 300 states and 442 transitions. [2022-04-06 22:39:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:39:31,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-04-06 22:39:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:31,681 INFO L225 Difference]: With dead ends: 300 [2022-04-06 22:39:31,681 INFO L226 Difference]: Without dead ends: 249 [2022-04-06 22:39:31,681 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 22:39:31,682 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 29 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:31,682 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 176 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:39:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-04-06 22:39:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 175. [2022-04-06 22:39:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 137 states have internal predecessors, (183), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 22:39:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 239 transitions. [2022-04-06 22:39:31,702 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 239 transitions. Word has length 37 [2022-04-06 22:39:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:31,702 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 239 transitions. [2022-04-06 22:39:31,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 22:39:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 239 transitions. [2022-04-06 22:39:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 22:39:31,703 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:31,703 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:31,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:31,927 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 [2022-04-06 22:39:31,928 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:31,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:31,928 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2022-04-06 22:39:31,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:31,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1251479708] [2022-04-06 22:39:31,929 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:31,929 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 2 times [2022-04-06 22:39:31,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:31,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899526536] [2022-04-06 22:39:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:31,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:31,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:31,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148954120] [2022-04-06 22:39:31,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:31,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:31,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:31,940 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) [2022-04-06 22:39:31,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 22:39:31,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:31,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:31,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 22:39:31,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 22:39:32,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:39:32,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:32,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899526536] [2022-04-06 22:39:32,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:32,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148954120] [2022-04-06 22:39:32,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148954120] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:32,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:32,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:39:32,131 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:32,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1251479708] [2022-04-06 22:39:32,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1251479708] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:32,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:32,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:39:32,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552431836] [2022-04-06 22:39:32,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:32,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:39:32,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:39:32,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:39:32,133 INFO L87 Difference]: Start difference. First operand 175 states and 239 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:39:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:32,263 INFO L93 Difference]: Finished difference Result 193 states and 262 transitions. [2022-04-06 22:39:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:39:32,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-06 22:39:32,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:32,265 INFO L225 Difference]: With dead ends: 193 [2022-04-06 22:39:32,265 INFO L226 Difference]: Without dead ends: 191 [2022-04-06 22:39:32,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-06 22:39:32,266 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 61 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:32,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 244 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:39:32,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-04-06 22:39:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-04-06 22:39:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 145 states have (on average 1.3379310344827586) internal successors, (194), 146 states have internal predecessors, (194), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 22:39:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 258 transitions. [2022-04-06 22:39:32,286 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 258 transitions. Word has length 39 [2022-04-06 22:39:32,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:32,287 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 258 transitions. [2022-04-06 22:39:32,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:39:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 258 transitions. [2022-04-06 22:39:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 22:39:32,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:32,287 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:32,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:32,513 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 [2022-04-06 22:39:32,514 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:32,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:32,514 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2022-04-06 22:39:32,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:32,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2062265471] [2022-04-06 22:39:32,515 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:32,515 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 2 times [2022-04-06 22:39:32,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:32,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299331483] [2022-04-06 22:39:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:32,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:32,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:32,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814414415] [2022-04-06 22:39:32,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:32,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:32,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:32,526 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) [2022-04-06 22:39:32,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 22:39:32,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:32,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:32,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 22:39:32,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:32,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:39:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:33,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:33,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299331483] [2022-04-06 22:39:33,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:33,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814414415] [2022-04-06 22:39:33,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814414415] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:39:33,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:39:33,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-04-06 22:39:33,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:33,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2062265471] [2022-04-06 22:39:33,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2062265471] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:33,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:33,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:39:33,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045391388] [2022-04-06 22:39:33,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:33,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:39:33,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:39:33,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:39:33,049 INFO L87 Difference]: Start difference. First operand 190 states and 258 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 22:39:33,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:33,238 INFO L93 Difference]: Finished difference Result 199 states and 266 transitions. [2022-04-06 22:39:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:39:33,239 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-04-06 22:39:33,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:33,240 INFO L225 Difference]: With dead ends: 199 [2022-04-06 22:39:33,240 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 22:39:33,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:39:33,241 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 114 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:33,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 299 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:39:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 22:39:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-04-06 22:39:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 149 states have internal predecessors, (197), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 22:39:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 261 transitions. [2022-04-06 22:39:33,259 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 261 transitions. Word has length 41 [2022-04-06 22:39:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:33,259 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 261 transitions. [2022-04-06 22:39:33,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 22:39:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 261 transitions. [2022-04-06 22:39:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 22:39:33,260 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:33,260 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:33,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:33,481 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 [2022-04-06 22:39:33,481 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:33,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2022-04-06 22:39:33,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:33,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1740125909] [2022-04-06 22:39:33,482 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:33,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 2 times [2022-04-06 22:39:33,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:33,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660582485] [2022-04-06 22:39:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:33,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:33,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:33,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511291078] [2022-04-06 22:39:33,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:33,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:33,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:33,492 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) [2022-04-06 22:39:33,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 22:39:33,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:33,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:33,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 22:39:33,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 22:39:33,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:39:33,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:33,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660582485] [2022-04-06 22:39:33,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:33,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511291078] [2022-04-06 22:39:33,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511291078] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:33,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:33,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:39:33,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:33,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1740125909] [2022-04-06 22:39:33,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1740125909] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:33,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:33,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:39:33,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144832548] [2022-04-06 22:39:33,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:33,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:39:33,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:33,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:39:33,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:39:33,641 INFO L87 Difference]: Start difference. First operand 194 states and 261 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-04-06 22:39:33,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:33,700 INFO L93 Difference]: Finished difference Result 261 states and 367 transitions. [2022-04-06 22:39:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:39:33,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 44 [2022-04-06 22:39:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:33,704 INFO L225 Difference]: With dead ends: 261 [2022-04-06 22:39:33,704 INFO L226 Difference]: Without dead ends: 259 [2022-04-06 22:39:33,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:39:33,705 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:33,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 163 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:39:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-06 22:39:33,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 228. [2022-04-06 22:39:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 161 states have (on average 1.329192546583851) internal successors, (214), 167 states have internal predecessors, (214), 53 states have call successors, (53), 14 states have call predecessors, (53), 13 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-06 22:39:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 318 transitions. [2022-04-06 22:39:33,736 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 318 transitions. Word has length 44 [2022-04-06 22:39:33,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:33,736 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 318 transitions. [2022-04-06 22:39:33,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-04-06 22:39:33,737 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 318 transitions. [2022-04-06 22:39:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 22:39:33,737 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:33,737 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:33,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 22:39:33,957 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 [2022-04-06 22:39:33,957 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:33,957 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 1 times [2022-04-06 22:39:33,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:33,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [97180845] [2022-04-06 22:39:33,958 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:33,958 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 2 times [2022-04-06 22:39:33,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:33,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092956067] [2022-04-06 22:39:33,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:33,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:33,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:33,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714540301] [2022-04-06 22:39:33,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:33,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:33,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:33,970 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) [2022-04-06 22:39:33,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 22:39:34,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:34,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:34,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 22:39:34,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:34,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:39:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:39:34,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:34,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092956067] [2022-04-06 22:39:34,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:34,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714540301] [2022-04-06 22:39:34,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714540301] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:39:34,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:39:34,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-06 22:39:34,193 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:34,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [97180845] [2022-04-06 22:39:34,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [97180845] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:34,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:34,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:39:34,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525625430] [2022-04-06 22:39:34,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:34,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:39:34,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:34,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:39:34,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:39:34,194 INFO L87 Difference]: Start difference. First operand 228 states and 318 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:34,281 INFO L93 Difference]: Finished difference Result 429 states and 607 transitions. [2022-04-06 22:39:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:39:34,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-04-06 22:39:34,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:34,284 INFO L225 Difference]: With dead ends: 429 [2022-04-06 22:39:34,284 INFO L226 Difference]: Without dead ends: 264 [2022-04-06 22:39:34,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:39:34,285 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 55 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:34,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 197 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:39:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-06 22:39:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2022-04-06 22:39:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 183 states have (on average 1.3060109289617485) internal successors, (239), 189 states have internal predecessors, (239), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 22:39:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 351 transitions. [2022-04-06 22:39:34,312 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 351 transitions. Word has length 42 [2022-04-06 22:39:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:34,313 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 351 transitions. [2022-04-06 22:39:34,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:39:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 351 transitions. [2022-04-06 22:39:34,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 22:39:34,313 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:34,313 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:34,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:34,535 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 [2022-04-06 22:39:34,535 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:34,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:34,536 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2022-04-06 22:39:34,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:34,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1710931964] [2022-04-06 22:39:34,536 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:34,537 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 2 times [2022-04-06 22:39:34,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:34,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724668426] [2022-04-06 22:39:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:34,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:34,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:34,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506793539] [2022-04-06 22:39:34,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:34,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:34,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:34,546 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) [2022-04-06 22:39:34,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 22:39:34,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:34,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:34,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 22:39:34,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 22:39:34,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:39:34,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:34,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724668426] [2022-04-06 22:39:34,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:34,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506793539] [2022-04-06 22:39:34,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506793539] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:34,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:34,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:39:34,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:34,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1710931964] [2022-04-06 22:39:34,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1710931964] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:34,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:34,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:39:34,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43294018] [2022-04-06 22:39:34,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:34,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:39:34,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:34,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:39:34,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:39:34,683 INFO L87 Difference]: Start difference. First operand 258 states and 351 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:39:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:34,746 INFO L93 Difference]: Finished difference Result 332 states and 473 transitions. [2022-04-06 22:39:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:39:34,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-04-06 22:39:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:34,749 INFO L225 Difference]: With dead ends: 332 [2022-04-06 22:39:34,749 INFO L226 Difference]: Without dead ends: 330 [2022-04-06 22:39:34,750 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:39:34,751 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:34,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:39:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-04-06 22:39:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 321. [2022-04-06 22:39:34,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 213 states have (on average 1.3427230046948357) internal successors, (286), 223 states have internal predecessors, (286), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 22:39:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 462 transitions. [2022-04-06 22:39:34,791 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 462 transitions. Word has length 46 [2022-04-06 22:39:34,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:34,791 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 462 transitions. [2022-04-06 22:39:34,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:39:34,791 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 462 transitions. [2022-04-06 22:39:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 22:39:34,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:34,792 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:34,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:35,014 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 [2022-04-06 22:39:35,014 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:35,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 1 times [2022-04-06 22:39:35,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:35,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [178840805] [2022-04-06 22:39:35,015 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 2 times [2022-04-06 22:39:35,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:35,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229717208] [2022-04-06 22:39:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:35,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:35,023 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:35,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915026828] [2022-04-06 22:39:35,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:35,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:35,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:35,030 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) [2022-04-06 22:39:35,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 22:39:35,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:35,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:35,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 22:39:35,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 22:39:35,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:39:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 22:39:35,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:35,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229717208] [2022-04-06 22:39:35,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:35,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915026828] [2022-04-06 22:39:35,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915026828] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:39:35,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:39:35,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-06 22:39:35,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:35,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [178840805] [2022-04-06 22:39:35,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [178840805] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:35,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:35,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:39:35,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502338873] [2022-04-06 22:39:35,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:35,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:39:35,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:35,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:39:35,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:39:35,304 INFO L87 Difference]: Start difference. First operand 321 states and 462 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 22:39:35,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:35,400 INFO L93 Difference]: Finished difference Result 335 states and 475 transitions. [2022-04-06 22:39:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:39:35,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 57 [2022-04-06 22:39:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:35,402 INFO L225 Difference]: With dead ends: 335 [2022-04-06 22:39:35,402 INFO L226 Difference]: Without dead ends: 328 [2022-04-06 22:39:35,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:39:35,403 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 46 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:35,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 212 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:39:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-04-06 22:39:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2022-04-06 22:39:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 216 states have (on average 1.337962962962963) internal successors, (289), 226 states have internal predecessors, (289), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 22:39:35,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 465 transitions. [2022-04-06 22:39:35,443 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 465 transitions. Word has length 57 [2022-04-06 22:39:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:35,443 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 465 transitions. [2022-04-06 22:39:35,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 22:39:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 465 transitions. [2022-04-06 22:39:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 22:39:35,444 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:35,444 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:35,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:35,655 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 [2022-04-06 22:39:35,656 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:35,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2022-04-06 22:39:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:35,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [733463693] [2022-04-06 22:39:35,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 2 times [2022-04-06 22:39:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:35,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285933212] [2022-04-06 22:39:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:35,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:35,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:35,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736673222] [2022-04-06 22:39:35,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:35,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:35,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:35,665 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) [2022-04-06 22:39:35,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 22:39:35,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:35,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:39:35,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 22:39:35,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:39:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 22:39:36,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:39:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 22:39:37,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:39:37,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285933212] [2022-04-06 22:39:37,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:39:37,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736673222] [2022-04-06 22:39:37,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736673222] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:39:37,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:39:37,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-06 22:39:37,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:39:37,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [733463693] [2022-04-06 22:39:37,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [733463693] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:39:37,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:39:37,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:39:37,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521530269] [2022-04-06 22:39:37,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:39:37,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:39:37,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:37,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:39:37,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:39:37,095 INFO L87 Difference]: Start difference. First operand 324 states and 465 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 22:39:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:39:37,592 INFO L93 Difference]: Finished difference Result 384 states and 559 transitions. [2022-04-06 22:39:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:39:37,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2022-04-06 22:39:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:39:37,594 INFO L225 Difference]: With dead ends: 384 [2022-04-06 22:39:37,595 INFO L226 Difference]: Without dead ends: 381 [2022-04-06 22:39:37,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-04-06 22:39:37,595 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 65 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:39:37,596 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 442 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:39:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-04-06 22:39:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2022-04-06 22:39:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 243 states have (on average 1.345679012345679) internal successors, (327), 256 states have internal predecessors, (327), 113 states have call successors, (113), 21 states have call predecessors, (113), 20 states have return successors, (111), 99 states have call predecessors, (111), 111 states have call successors, (111) [2022-04-06 22:39:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 551 transitions. [2022-04-06 22:39:37,656 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 551 transitions. Word has length 58 [2022-04-06 22:39:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:39:37,656 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 551 transitions. [2022-04-06 22:39:37,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 22:39:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 551 transitions. [2022-04-06 22:39:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 22:39:37,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:39:37,657 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:39:37,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:37,870 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 [2022-04-06 22:39:37,870 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:39:37,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:39:37,871 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 1 times [2022-04-06 22:39:37,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:39:37,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2147372986] [2022-04-06 22:39:37,871 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:39:37,871 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 2 times [2022-04-06 22:39:37,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:39:37,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658350713] [2022-04-06 22:39:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:39:37,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:39:37,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:39:37,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356555132] [2022-04-06 22:39:37,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:39:37,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:39:37,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:39:37,885 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) [2022-04-06 22:39:37,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 22:39:37,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:39:37,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-06 22:39:37,929 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 22:39:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 22:39:37,975 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 22:39:37,975 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-06 22:39:37,975 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 22:39:37,977 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 22:39:38,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 22:39:38,201 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 [2022-04-06 22:39:38,203 INFO L719 BasicCegarLoop]: Path program histogram: [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-04-06 22:39:38,205 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 22:39:38,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:39:38 BoogieIcfgContainer [2022-04-06 22:39:38,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 22:39:38,217 INFO L158 Benchmark]: Toolchain (without parser) took 12391.34ms. Allocated memory was 189.8MB in the beginning and 284.2MB in the end (delta: 94.4MB). Free memory was 132.1MB in the beginning and 213.8MB in the end (delta: -81.7MB). Peak memory consumption was 13.3MB. Max. memory is 8.0GB. [2022-04-06 22:39:38,218 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 189.8MB. Free memory was 148.0MB in the beginning and 147.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 22:39:38,218 INFO L158 Benchmark]: CACSL2BoogieTranslator took 258.51ms. Allocated memory was 189.8MB in the beginning and 284.2MB in the end (delta: 94.4MB). Free memory was 131.8MB in the beginning and 257.3MB in the end (delta: -125.5MB). Peak memory consumption was 15.3MB. Max. memory is 8.0GB. [2022-04-06 22:39:38,218 INFO L158 Benchmark]: Boogie Preprocessor took 39.80ms. Allocated memory is still 284.2MB. Free memory was 257.3MB in the beginning and 255.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 22:39:38,218 INFO L158 Benchmark]: RCFGBuilder took 280.18ms. Allocated memory is still 284.2MB. Free memory was 255.6MB in the beginning and 242.7MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 22:39:38,218 INFO L158 Benchmark]: TraceAbstraction took 11808.85ms. Allocated memory is still 284.2MB. Free memory was 242.1MB in the beginning and 213.8MB in the end (delta: 28.3MB). Peak memory consumption was 28.8MB. Max. memory is 8.0GB. [2022-04-06 22:39:38,219 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 189.8MB. Free memory was 148.0MB in the beginning and 147.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 258.51ms. Allocated memory was 189.8MB in the beginning and 284.2MB in the end (delta: 94.4MB). Free memory was 131.8MB in the beginning and 257.3MB in the end (delta: -125.5MB). Peak memory consumption was 15.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.80ms. Allocated memory is still 284.2MB. Free memory was 257.3MB in the beginning and 255.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 280.18ms. Allocated memory is still 284.2MB. Free memory was 255.6MB in the beginning and 242.7MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 11808.85ms. Allocated memory is still 284.2MB. Free memory was 242.1MB in the beginning and 213.8MB in the end (delta: 28.3MB). Peak memory consumption was 28.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L34] EXPR counter++ [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 [L41] EXPR counter++ [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 [L41] EXPR counter++ [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b [L48] EXPR counter++ [L48] COND TRUE counter++<5 [L49] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y * r + x * p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(a == k * b + c) [L52] CALL __VERIFIER_assert(v == b * d) [L11] COND FALSE !(!(cond)) [L52] RET __VERIFIER_assert(v == b * d) [L54] COND TRUE !(c >= 2 * v) [L59] c = c - v [L60] k = k + d [L41] EXPR counter++ [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ [L34] COND FALSE !(counter++<5) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.7s, OverallIterations: 18, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 739 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 678 mSDsluCounter, 3372 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2525 mSDsCounter, 298 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1779 IncrementalHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 298 mSolverCounterUnsat, 847 mSDtfsCounter, 1779 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 966 GetRequests, 823 SyntacticMatches, 8 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=377occurred in iteration=17, InterpolantAutomatonStates: 127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 185 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-06 22:39:38,230 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...