/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 06:01:43,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 06:01:43,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 06:01:43,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 06:01:43,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 06:01:43,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 06:01:43,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 06:01:43,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 06:01:43,904 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 06:01:43,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 06:01:43,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 06:01:43,907 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 06:01:43,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 06:01:43,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 06:01:43,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 06:01:43,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 06:01:43,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 06:01:43,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 06:01:43,908 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 06:01:43,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 06:01:43,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 06:01:43,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 06:01:43,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 06:01:43,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 06:01:43,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 06:01:43,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 06:01:43,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:01:43,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 06:01:43,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 06:01:43,910 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 06:01:43,910 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 06:01:43,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 06:01:43,910 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 06:01:43,910 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 06:01:44,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 06:01:44,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 06:01:44,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 06:01:44,142 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 06:01:44,142 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 06:01:44,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2022-03-19 06:01:44,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f3088eea/1cfb58a7b8a7457688dab5cfef2428fb/FLAG400608ec2 [2022-03-19 06:01:44,644 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 06:01:44,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2022-03-19 06:01:44,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f3088eea/1cfb58a7b8a7457688dab5cfef2428fb/FLAG400608ec2 [2022-03-19 06:01:45,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f3088eea/1cfb58a7b8a7457688dab5cfef2428fb [2022-03-19 06:01:45,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 06:01:45,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 06:01:45,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 06:01:45,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 06:01:45,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 06:01:45,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:01:45" (1/1) ... [2022-03-19 06:01:45,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36041fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:01:45, skipping insertion in model container [2022-03-19 06:01:45,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:01:45" (1/1) ... [2022-03-19 06:01:45,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 06:01:45,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 06:01:45,223 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/prodbin-ll_unwindbound10.c[537,550] [2022-03-19 06:01:45,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:01:45,242 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 06:01:45,252 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/prodbin-ll_unwindbound10.c[537,550] [2022-03-19 06:01:45,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:01:45,266 INFO L208 MainTranslator]: Completed translation [2022-03-19 06:01:45,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:01:45 WrapperNode [2022-03-19 06:01:45,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 06:01:45,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 06:01:45,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 06:01:45,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 06:01:45,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:01:45" (1/1) ... [2022-03-19 06:01:45,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:01:45" (1/1) ... [2022-03-19 06:01:45,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:01:45" (1/1) ... [2022-03-19 06:01:45,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:01:45" (1/1) ... [2022-03-19 06:01:45,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:01:45" (1/1) ... [2022-03-19 06:01:45,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:01:45" (1/1) ... [2022-03-19 06:01:45,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:01:45" (1/1) ... [2022-03-19 06:01:45,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 06:01:45,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 06:01:45,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 06:01:45,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 06:01:45,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:01:45" (1/1) ... [2022-03-19 06:01:45,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:01:45,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:45,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 06:01:45,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 06:01:45,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 06:01:45,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 06:01:45,390 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 06:01:45,390 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 06:01:45,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 06:01:45,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 06:01:45,391 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 06:01:45,391 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 06:01:45,391 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 06:01:45,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 06:01:45,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 06:01:45,393 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 06:01:45,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 06:01:45,395 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 06:01:45,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 06:01:45,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 06:01:45,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 06:01:45,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 06:01:45,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 06:01:45,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 06:01:45,453 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 06:01:45,454 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 06:01:45,545 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 06:01:45,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 06:01:45,552 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 06:01:45,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:01:45 BoogieIcfgContainer [2022-03-19 06:01:45,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 06:01:45,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 06:01:45,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 06:01:45,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 06:01:45,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 06:01:45" (1/3) ... [2022-03-19 06:01:45,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbe4d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:01:45, skipping insertion in model container [2022-03-19 06:01:45,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:01:45" (2/3) ... [2022-03-19 06:01:45,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbe4d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:01:45, skipping insertion in model container [2022-03-19 06:01:45,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:01:45" (3/3) ... [2022-03-19 06:01:45,565 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound10.c [2022-03-19 06:01:45,570 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 06:01:45,570 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 06:01:45,609 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 06:01:45,615 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 06:01:45,616 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 06:01:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:01:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 06:01:45,662 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:45,662 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:45,664 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2022-03-19 06:01:45,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:45,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1960874873] [2022-03-19 06:01:45,694 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:45,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 2 times [2022-03-19 06:01:45,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:45,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415981090] [2022-03-19 06:01:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:45,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:01:45,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:01:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:01:45,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:01:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:01:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:01:45,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:45,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415981090] [2022-03-19 06:01:45,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415981090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:45,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:45,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 06:01:45,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:45,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1960874873] [2022-03-19 06:01:45,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1960874873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:45,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:45,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 06:01:45,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147012169] [2022-03-19 06:01:45,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:45,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 06:01:45,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 06:01:45,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 06:01:45,979 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:01:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:46,102 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-19 06:01:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 06:01:46,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 06:01:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:46,110 INFO L225 Difference]: With dead ends: 52 [2022-03-19 06:01:46,110 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 06:01:46,113 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 06:01:46,116 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:46,117 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:01:46,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 06:01:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-19 06:01:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 06:01:46,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-19 06:01:46,148 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-03-19 06:01:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:46,148 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-19 06:01:46,148 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:01:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-19 06:01:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 06:01:46,151 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:46,151 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:46,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 06:01:46,151 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:46,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:46,152 INFO L85 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2022-03-19 06:01:46,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:46,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1010758006] [2022-03-19 06:01:46,153 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:46,154 INFO L85 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 2 times [2022-03-19 06:01:46,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:46,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790579323] [2022-03-19 06:01:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:46,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:46,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:46,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428281711] [2022-03-19 06:01:46,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:01:46,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:46,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:46,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:46,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 06:01:46,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 06:01:46,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:46,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 06:01:46,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:01:46,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 06:01:46,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:46,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790579323] [2022-03-19 06:01:46,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:46,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428281711] [2022-03-19 06:01:46,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428281711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:46,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:46,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 06:01:46,395 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:46,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1010758006] [2022-03-19 06:01:46,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1010758006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:46,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:46,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 06:01:46,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961339407] [2022-03-19 06:01:46,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:46,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 06:01:46,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:46,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 06:01:46,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 06:01:46,398 INFO L87 Difference]: Start difference. First operand 25 states and 28 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 06:01:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:46,422 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-19 06:01:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 06:01:46,423 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-19 06:01:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:46,426 INFO L225 Difference]: With dead ends: 34 [2022-03-19 06:01:46,426 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 06:01:46,429 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 06:01:46,431 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:46,432 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:01:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 06:01:46,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-19 06:01:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 06:01:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-19 06:01:46,441 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-03-19 06:01:46,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:46,442 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-19 06:01:46,442 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 06:01:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-19 06:01:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 06:01:46,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:46,443 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:46,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:46,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:46,676 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:46,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:46,677 INFO L85 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 1 times [2022-03-19 06:01:46,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:46,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1618581589] [2022-03-19 06:01:46,678 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:46,678 INFO L85 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 2 times [2022-03-19 06:01:46,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:46,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105833417] [2022-03-19 06:01:46,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:46,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:46,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:46,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311358631] [2022-03-19 06:01:46,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:01:46,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:46,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:46,696 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:46,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 06:01:46,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 06:01:46,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:46,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 06:01:46,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:01:46,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 06:01:46,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:46,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105833417] [2022-03-19 06:01:46,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:46,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311358631] [2022-03-19 06:01:46,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311358631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:46,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:46,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:01:46,872 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:46,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1618581589] [2022-03-19 06:01:46,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1618581589] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:46,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:46,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:01:46,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393856604] [2022-03-19 06:01:46,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:46,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:01:46,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:46,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:01:46,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 06:01:46,874 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:01:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:46,952 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-03-19 06:01:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 06:01:46,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-19 06:01:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:46,955 INFO L225 Difference]: With dead ends: 38 [2022-03-19 06:01:46,956 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 06:01:46,957 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:01:46,960 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:46,960 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 80 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:01:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 06:01:46,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-03-19 06:01:46,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 06:01:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-19 06:01:46,976 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-03-19 06:01:46,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:46,976 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-19 06:01:46,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:01:46,977 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-19 06:01:46,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 06:01:46,977 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:46,978 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:46,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:47,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 06:01:47,184 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:47,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1094479982, now seen corresponding path program 1 times [2022-03-19 06:01:47,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:47,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1118793819] [2022-03-19 06:01:47,186 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:01:47,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1094479982, now seen corresponding path program 2 times [2022-03-19 06:01:47,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:47,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885327505] [2022-03-19 06:01:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:47,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:47,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:47,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838165494] [2022-03-19 06:01:47,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:01:47,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:47,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:47,244 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:47,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 06:01:47,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:01:47,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:47,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 06:01:47,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:01:47,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 06:01:47,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:47,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885327505] [2022-03-19 06:01:47,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:47,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838165494] [2022-03-19 06:01:47,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838165494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:47,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:47,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:01:47,431 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:47,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1118793819] [2022-03-19 06:01:47,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1118793819] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:47,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:47,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:01:47,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795061931] [2022-03-19 06:01:47,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:47,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 06:01:47,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:47,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 06:01:47,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:01:47,433 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:01:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:47,496 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-19 06:01:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 06:01:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-19 06:01:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:47,500 INFO L225 Difference]: With dead ends: 42 [2022-03-19 06:01:47,500 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 06:01:47,503 INFO L911 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 [2022-03-19 06:01:47,506 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:47,508 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 94 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:01:47,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 06:01:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-03-19 06:01:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 06:01:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-19 06:01:47,520 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-03-19 06:01:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:47,521 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-19 06:01:47,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:01:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-19 06:01:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 06:01:47,522 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:47,522 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:47,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:47,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:47,723 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:47,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:47,724 INFO L85 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 1 times [2022-03-19 06:01:47,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:47,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [474871122] [2022-03-19 06:01:47,741 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:01:47,742 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:01:47,742 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:01:47,742 INFO L85 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 2 times [2022-03-19 06:01:47,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:47,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344638468] [2022-03-19 06:01:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:47,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:47,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:47,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566856866] [2022-03-19 06:01:47,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:01:47,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:47,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:47,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:47,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 06:01:47,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:01:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:47,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 06:01:47,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:01:47,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:01:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:01:48,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:48,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344638468] [2022-03-19 06:01:48,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:48,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566856866] [2022-03-19 06:01:48,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566856866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:01:48,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:01:48,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 06:01:48,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:48,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [474871122] [2022-03-19 06:01:48,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [474871122] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:48,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:48,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:01:48,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009994971] [2022-03-19 06:01:48,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:48,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:01:48,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:48,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:01:48,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:01:48,006 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 06:01:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:48,037 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-03-19 06:01:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 06:01:48,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-03-19 06:01:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:48,039 INFO L225 Difference]: With dead ends: 44 [2022-03-19 06:01:48,039 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 06:01:48,039 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-19 06:01:48,040 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:48,040 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 82 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:01:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 06:01:48,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 06:01:48,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 06:01:48,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-03-19 06:01:48,048 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2022-03-19 06:01:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:48,048 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-03-19 06:01:48,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 06:01:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-03-19 06:01:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 06:01:48,049 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:48,049 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:48,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:48,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:48,256 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 1 times [2022-03-19 06:01:48,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:48,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1166719185] [2022-03-19 06:01:48,261 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:01:48,262 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:01:48,262 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:01:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 2 times [2022-03-19 06:01:48,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:48,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395267572] [2022-03-19 06:01:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:48,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:48,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:48,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224402430] [2022-03-19 06:01:48,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:01:48,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:48,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:48,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:48,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 06:01:48,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:01:48,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 06:01:48,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:01:48,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:01:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:01:50,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:50,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395267572] [2022-03-19 06:01:50,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:50,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224402430] [2022-03-19 06:01:50,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224402430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:01:50,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:01:50,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-03-19 06:01:50,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:50,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1166719185] [2022-03-19 06:01:50,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1166719185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:50,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:50,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:01:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022757762] [2022-03-19 06:01:50,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:50,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:01:50,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:50,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:01:50,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:01:50,146 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:01:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:01:50,353 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-03-19 06:01:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:01:50,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-03-19 06:01:50,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:01:50,354 INFO L225 Difference]: With dead ends: 55 [2022-03-19 06:01:50,354 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 06:01:50,355 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:01:50,356 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:01:50,356 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 159 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:01:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 06:01:50,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-03-19 06:01:50,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:01:50,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-03-19 06:01:50,364 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 28 [2022-03-19 06:01:50,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:01:50,364 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-03-19 06:01:50,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:01:50,364 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-03-19 06:01:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 06:01:50,365 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:01:50,365 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:01:50,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 06:01:50,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:50,568 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:01:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:01:50,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1395753147, now seen corresponding path program 1 times [2022-03-19 06:01:50,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:50,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [110572462] [2022-03-19 06:01:50,572 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:01:50,572 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:01:50,572 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:01:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1395753147, now seen corresponding path program 2 times [2022-03-19 06:01:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:01:50,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840616911] [2022-03-19 06:01:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:01:50,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:01:50,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:01:50,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485561937] [2022-03-19 06:01:50,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:01:50,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:01:50,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:01:50,594 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:01:50,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 06:01:50,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:01:50,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:01:50,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 06:01:50,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:01:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:01:53,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:01:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:01:57,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:01:57,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840616911] [2022-03-19 06:01:57,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:01:57,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485561937] [2022-03-19 06:01:57,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485561937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:01:57,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:01:57,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-03-19 06:01:57,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:01:57,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [110572462] [2022-03-19 06:01:57,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [110572462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:01:57,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:01:57,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:01:57,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916584686] [2022-03-19 06:01:57,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:01:57,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:01:57,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:01:57,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:01:57,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-19 06:01:57,830 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:01:59,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 06:02:01,976 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 06:02:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:02:02,091 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-03-19 06:02:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:02:02,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-03-19 06:02:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:02:02,092 INFO L225 Difference]: With dead ends: 57 [2022-03-19 06:02:02,092 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 06:02:02,092 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:02:02,093 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:02:02,093 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 172 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 203 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-03-19 06:02:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 06:02:02,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-03-19 06:02:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:02:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-03-19 06:02:02,101 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2022-03-19 06:02:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:02:02,101 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-03-19 06:02:02,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:02:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-03-19 06:02:02,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 06:02:02,102 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:02:02,102 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:02:02,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 06:02:02,328 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:02:02,328 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:02:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:02:02,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 1 times [2022-03-19 06:02:02,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:02:02,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1897253419] [2022-03-19 06:02:02,332 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:02:02,332 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:02:02,333 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:02:02,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 2 times [2022-03-19 06:02:02,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:02:02,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015372476] [2022-03-19 06:02:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:02:02,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:02:02,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:02:02,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501486550] [2022-03-19 06:02:02,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:02:02,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:02:02,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:02:02,346 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:02:02,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 06:02:02,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:02:02,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:02:02,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 06:02:02,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:02:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:02:02,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:02:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:02:02,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:02:02,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015372476] [2022-03-19 06:02:02,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:02:02,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501486550] [2022-03-19 06:02:02,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501486550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:02:02,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:02:02,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 06:02:02,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:02:02,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1897253419] [2022-03-19 06:02:02,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1897253419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:02:02,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:02:02,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:02:02,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446135115] [2022-03-19 06:02:02,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:02:02,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 06:02:02,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:02:02,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 06:02:02,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:02:02,629 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 06:02:04,634 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 06:02:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:02:04,745 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-03-19 06:02:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 06:02:04,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-03-19 06:02:04,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:02:04,748 INFO L225 Difference]: With dead ends: 59 [2022-03-19 06:02:04,748 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 06:02:04,748 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:02:04,749 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:02:04,749 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 107 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 06:02:04,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 06:02:04,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-03-19 06:02:04,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:02:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-03-19 06:02:04,757 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2022-03-19 06:02:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:02:04,758 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-03-19 06:02:04,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 06:02:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-03-19 06:02:04,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 06:02:04,759 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:02:04,759 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:02:04,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 06:02:04,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:02:04,983 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:02:04,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:02:04,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1456887472, now seen corresponding path program 3 times [2022-03-19 06:02:04,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:02:04,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [19054634] [2022-03-19 06:02:04,987 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:02:04,987 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:02:04,987 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:02:04,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1456887472, now seen corresponding path program 4 times [2022-03-19 06:02:04,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:02:04,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646866082] [2022-03-19 06:02:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:02:04,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:02:05,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:02:05,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133858699] [2022-03-19 06:02:05,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:02:05,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:02:05,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:02:05,012 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:02:05,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 06:02:05,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:02:05,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:02:05,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 06:02:05,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:02:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:02:05,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:02:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:02:05,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:02:05,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646866082] [2022-03-19 06:02:05,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:02:05,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133858699] [2022-03-19 06:02:05,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133858699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:02:05,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:02:05,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 06:02:05,251 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:02:05,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [19054634] [2022-03-19 06:02:05,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [19054634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:02:05,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:02:05,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:02:05,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380344418] [2022-03-19 06:02:05,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:02:05,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 06:02:05,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:02:05,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 06:02:05,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:02:05,253 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 06:02:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:02:05,295 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2022-03-19 06:02:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 06:02:05,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-03-19 06:02:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:02:05,296 INFO L225 Difference]: With dead ends: 54 [2022-03-19 06:02:05,296 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 06:02:05,296 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:02:05,297 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:02:05,297 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 81 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:02:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 06:02:05,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-19 06:02:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:02:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-03-19 06:02:05,316 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2022-03-19 06:02:05,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:02:05,316 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-03-19 06:02:05,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 06:02:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-03-19 06:02:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 06:02:05,320 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:02:05,320 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:02:05,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 06:02:05,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 06:02:05,546 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:02:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:02:05,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1455100012, now seen corresponding path program 3 times [2022-03-19 06:02:05,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:02:05,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1416644340] [2022-03-19 06:02:05,548 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:02:05,549 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:02:05,549 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:02:05,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1455100012, now seen corresponding path program 4 times [2022-03-19 06:02:05,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:02:05,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718733843] [2022-03-19 06:02:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:02:05,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:02:05,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:02:05,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215303685] [2022-03-19 06:02:05,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:02:05,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:02:05,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:02:05,558 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:02:05,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 06:02:05,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:02:05,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:02:05,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 06:02:05,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:02:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:02:08,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:02:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:02:10,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:02:10,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718733843] [2022-03-19 06:02:10,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:02:10,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215303685] [2022-03-19 06:02:10,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215303685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:02:10,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:02:10,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-19 06:02:10,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:02:10,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1416644340] [2022-03-19 06:02:10,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1416644340] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:02:10,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:02:10,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:02:10,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804051925] [2022-03-19 06:02:10,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:02:10,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:02:10,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:02:10,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:02:10,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:02:10,427 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (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) [2022-03-19 06:02:10,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:02:10,809 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-03-19 06:02:10,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:02:10,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (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 38 [2022-03-19 06:02:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:02:10,810 INFO L225 Difference]: With dead ends: 70 [2022-03-19 06:02:10,810 INFO L226 Difference]: Without dead ends: 68 [2022-03-19 06:02:10,810 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:02:10,811 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:02:10,811 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 164 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 06:02:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-19 06:02:10,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-03-19 06:02:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:02:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-03-19 06:02:10,821 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 38 [2022-03-19 06:02:10,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:02:10,822 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-03-19 06:02:10,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (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) [2022-03-19 06:02:10,822 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-03-19 06:02:10,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 06:02:10,823 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:02:10,823 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:02:10,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-19 06:02:11,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 06:02:11,032 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:02:11,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:02:11,032 INFO L85 PathProgramCache]: Analyzing trace with hash -645753386, now seen corresponding path program 1 times [2022-03-19 06:02:11,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:02:11,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2027629171] [2022-03-19 06:02:11,036 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:02:11,036 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:02:11,036 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:02:11,037 INFO L85 PathProgramCache]: Analyzing trace with hash -645753386, now seen corresponding path program 2 times [2022-03-19 06:02:11,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:02:11,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880620272] [2022-03-19 06:02:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:02:11,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:02:11,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:02:11,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130406984] [2022-03-19 06:02:11,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:02:11,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:02:11,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:02:11,061 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:02:11,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 06:02:11,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:02:11,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:02:11,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 06:02:11,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:02:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 06:02:28,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:02:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:02:39,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:02:39,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880620272] [2022-03-19 06:02:39,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:02:39,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130406984] [2022-03-19 06:02:39,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130406984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:02:39,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:02:39,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-03-19 06:02:39,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:02:39,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2027629171] [2022-03-19 06:02:39,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2027629171] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:02:39,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:02:39,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:02:39,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295671150] [2022-03-19 06:02:39,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:02:39,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:02:39,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:02:39,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:02:39,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:02:39,375 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 06:02:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:02:40,104 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-03-19 06:02:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 06:02:40,105 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-03-19 06:02:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:02:40,105 INFO L225 Difference]: With dead ends: 78 [2022-03-19 06:02:40,106 INFO L226 Difference]: Without dead ends: 76 [2022-03-19 06:02:40,106 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:02:40,106 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 06:02:40,107 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 218 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 06:02:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-19 06:02:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2022-03-19 06:02:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:02:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-03-19 06:02:40,117 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 38 [2022-03-19 06:02:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:02:40,117 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-03-19 06:02:40,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 06:02:40,117 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-03-19 06:02:40,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 06:02:40,118 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:02:40,118 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:02:40,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-19 06:02:40,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 06:02:40,331 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:02:40,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:02:40,332 INFO L85 PathProgramCache]: Analyzing trace with hash 539044694, now seen corresponding path program 3 times [2022-03-19 06:02:40,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:02:40,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1234118099] [2022-03-19 06:02:40,336 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:02:40,336 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:02:40,336 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:02:40,336 INFO L85 PathProgramCache]: Analyzing trace with hash 539044694, now seen corresponding path program 4 times [2022-03-19 06:02:40,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:02:40,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825605397] [2022-03-19 06:02:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:02:40,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:02:40,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:02:40,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892146536] [2022-03-19 06:02:40,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:02:40,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:02:40,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:02:40,345 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:02:40,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 06:02:40,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:02:40,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:02:40,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 06:02:40,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:02:41,016 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 06:02:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 06:02:43,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:02:46,716 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 06:02:47,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:02:47,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825605397] [2022-03-19 06:02:47,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:02:47,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892146536] [2022-03-19 06:02:47,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892146536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:02:47,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:02:47,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 06:02:47,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:02:47,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1234118099] [2022-03-19 06:02:47,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1234118099] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:02:47,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:02:47,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:02:47,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910844878] [2022-03-19 06:02:47,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:02:47,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:02:47,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:02:47,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:02:47,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:02:47,040 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 06:02:50,985 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 06:02:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:02:51,037 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-03-19 06:02:51,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:02:51,038 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-03-19 06:02:51,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:02:51,038 INFO L225 Difference]: With dead ends: 75 [2022-03-19 06:02:51,038 INFO L226 Difference]: Without dead ends: 73 [2022-03-19 06:02:51,039 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:02:51,039 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:02:51,040 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 221 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 19 Unchecked, 2.1s Time] [2022-03-19 06:02:51,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-19 06:02:51,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2022-03-19 06:02:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:02:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-03-19 06:02:51,055 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 38 [2022-03-19 06:02:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:02:51,055 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-03-19 06:02:51,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 06:02:51,056 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-03-19 06:02:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 06:02:51,057 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:02:51,058 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:02:51,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-19 06:02:51,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 06:02:51,271 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:02:51,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:02:51,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1348391320, now seen corresponding path program 3 times [2022-03-19 06:02:51,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:02:51,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2022282810] [2022-03-19 06:02:51,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:02:51,274 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:02:51,274 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:02:51,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1348391320, now seen corresponding path program 4 times [2022-03-19 06:02:51,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:02:51,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018746923] [2022-03-19 06:02:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:02:51,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:02:51,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:02:51,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283794856] [2022-03-19 06:02:51,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:02:51,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:02:51,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:02:51,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:02:51,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 06:02:51,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:02:51,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:02:51,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 06:02:51,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:03:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 06:03:04,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:03:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 06:03:22,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:03:22,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018746923] [2022-03-19 06:03:22,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:03:22,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283794856] [2022-03-19 06:03:22,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283794856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:03:22,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:03:22,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-03-19 06:03:22,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:03:22,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2022282810] [2022-03-19 06:03:22,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2022282810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:03:22,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:03:22,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:03:22,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605693350] [2022-03-19 06:03:22,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:03:22,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:03:22,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:03:22,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:03:22,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-03-19 06:03:22,032 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 06:03:24,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 06:03:26,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 06:03:27,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 06:03:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:03:28,190 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-03-19 06:03:28,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 06:03:28,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-03-19 06:03:28,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:03:28,192 INFO L225 Difference]: With dead ends: 76 [2022-03-19 06:03:28,192 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 06:03:28,192 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:03:28,192 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:03:28,193 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 247 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-03-19 06:03:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 06:03:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2022-03-19 06:03:28,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:03:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-03-19 06:03:28,203 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 38 [2022-03-19 06:03:28,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:03:28,203 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-03-19 06:03:28,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 06:03:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-03-19 06:03:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 06:03:28,204 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:03:28,204 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:03:28,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-19 06:03:28,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 06:03:28,411 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:03:28,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:03:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1258071893, now seen corresponding path program 5 times [2022-03-19 06:03:28,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:03:28,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1704142794] [2022-03-19 06:03:28,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:03:28,414 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:03:28,414 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:03:28,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1258071893, now seen corresponding path program 6 times [2022-03-19 06:03:28,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:03:28,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13144337] [2022-03-19 06:03:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:03:28,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:03:28,427 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:03:28,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511115678] [2022-03-19 06:03:28,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:03:28,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:03:28,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:03:28,428 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:03:28,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 06:03:28,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 06:03:28,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:03:28,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 06:03:28,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:03:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:03:28,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:03:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 06:03:28,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:03:28,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13144337] [2022-03-19 06:03:28,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:03:28,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511115678] [2022-03-19 06:03:28,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511115678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:03:28,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:03:28,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 06:03:28,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:03:28,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1704142794] [2022-03-19 06:03:28,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1704142794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:03:28,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:03:28,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:03:28,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4741819] [2022-03-19 06:03:28,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:03:28,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 06:03:28,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:03:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 06:03:28,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:03:28,678 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:03:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:03:28,736 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2022-03-19 06:03:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:03:28,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2022-03-19 06:03:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:03:28,737 INFO L225 Difference]: With dead ends: 64 [2022-03-19 06:03:28,737 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 06:03:28,737 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:03:28,738 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:03:28,738 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 90 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:03:28,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 06:03:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-19 06:03:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:03:28,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-03-19 06:03:28,749 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 48 [2022-03-19 06:03:28,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:03:28,749 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-03-19 06:03:28,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:03:28,750 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-03-19 06:03:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 06:03:28,750 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:03:28,750 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:03:28,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 06:03:28,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 06:03:28,951 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:03:28,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:03:28,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1256284433, now seen corresponding path program 5 times [2022-03-19 06:03:28,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:03:28,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [942119350] [2022-03-19 06:03:28,953 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:03:28,954 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:03:28,954 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:03:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1256284433, now seen corresponding path program 6 times [2022-03-19 06:03:28,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:03:28,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456875409] [2022-03-19 06:03:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:03:28,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:03:28,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:03:28,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294000593] [2022-03-19 06:03:28,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:03:28,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:03:28,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:03:28,962 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:03:28,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 06:03:29,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 06:03:29,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:03:29,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 06:03:29,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:03:30,151 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 06:03:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 06:03:31,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:03:36,810 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 06:05:24,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:05:24,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456875409] [2022-03-19 06:05:24,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:05:24,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294000593] [2022-03-19 06:05:24,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294000593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:05:24,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:05:24,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-19 06:05:24,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:05:24,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [942119350] [2022-03-19 06:05:24,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [942119350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:05:24,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:05:24,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:05:24,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761553427] [2022-03-19 06:05:24,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:05:24,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 06:05:24,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:05:24,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 06:05:24,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=483, Unknown=2, NotChecked=0, Total=600 [2022-03-19 06:05:24,784 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:05:26,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 06:05:30,118 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 06:05:36,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 06:05:37,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:05:37,895 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2022-03-19 06:05:37,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 06:05:37,895 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 48 [2022-03-19 06:05:37,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:05:37,896 INFO L225 Difference]: With dead ends: 90 [2022-03-19 06:05:37,896 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 06:05:37,897 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=186, Invalid=803, Unknown=3, NotChecked=0, Total=992 [2022-03-19 06:05:37,897 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-03-19 06:05:37,897 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 269 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 268 Invalid, 1 Unknown, 7 Unchecked, 6.8s Time] [2022-03-19 06:05:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 06:05:37,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2022-03-19 06:05:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 64 states have (on average 1.125) internal successors, (72), 66 states have internal predecessors, (72), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 06:05:37,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2022-03-19 06:05:37,912 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 48 [2022-03-19 06:05:37,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:05:37,912 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2022-03-19 06:05:37,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:05:37,913 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2022-03-19 06:05:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 06:05:37,913 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:05:37,913 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:05:37,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 06:05:38,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:05:38,118 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:05:38,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:05:38,118 INFO L85 PathProgramCache]: Analyzing trace with hash -446937807, now seen corresponding path program 5 times [2022-03-19 06:05:38,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:05:38,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [302623147] [2022-03-19 06:05:38,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:05:38,121 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:05:38,121 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:05:38,121 INFO L85 PathProgramCache]: Analyzing trace with hash -446937807, now seen corresponding path program 6 times [2022-03-19 06:05:38,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:05:38,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711209429] [2022-03-19 06:05:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:05:38,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:05:38,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:05:38,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213392064] [2022-03-19 06:05:38,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:05:38,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:05:38,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:05:38,130 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:05:38,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 06:05:38,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 06:05:38,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:05:38,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 06:05:38,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:05:38,763 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 06:05:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 06:05:41,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:05:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 06:05:56,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:05:56,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711209429] [2022-03-19 06:05:56,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:05:56,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213392064] [2022-03-19 06:05:56,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213392064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:05:56,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:05:56,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2022-03-19 06:05:56,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:05:56,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [302623147] [2022-03-19 06:05:56,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [302623147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:05:56,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:05:56,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 06:05:56,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47664219] [2022-03-19 06:05:56,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:05:56,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 06:05:56,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:05:56,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 06:05:56,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=343, Unknown=4, NotChecked=0, Total=420 [2022-03-19 06:05:56,048 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 06:05:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:05:57,322 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2022-03-19 06:05:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 06:05:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2022-03-19 06:05:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:05:57,323 INFO L225 Difference]: With dead ends: 120 [2022-03-19 06:05:57,323 INFO L226 Difference]: Without dead ends: 118 [2022-03-19 06:05:57,323 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=90, Invalid=458, Unknown=4, NotChecked=0, Total=552 [2022-03-19 06:05:57,324 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:05:57,324 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 243 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 269 Invalid, 0 Unknown, 16 Unchecked, 1.2s Time] [2022-03-19 06:05:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-19 06:05:57,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2022-03-19 06:05:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 78 states have (on average 1.141025641025641) internal successors, (89), 81 states have internal predecessors, (89), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 06:05:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2022-03-19 06:05:57,344 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 48 [2022-03-19 06:05:57,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:05:57,344 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2022-03-19 06:05:57,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 06:05:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2022-03-19 06:05:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 06:05:57,345 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:05:57,345 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:05:57,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 06:05:57,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 06:05:57,559 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:05:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:05:57,560 INFO L85 PathProgramCache]: Analyzing trace with hash 737860273, now seen corresponding path program 7 times [2022-03-19 06:05:57,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:05:57,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1729432992] [2022-03-19 06:05:57,563 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:05:57,563 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:05:57,563 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:05:57,563 INFO L85 PathProgramCache]: Analyzing trace with hash 737860273, now seen corresponding path program 8 times [2022-03-19 06:05:57,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:05:57,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575068627] [2022-03-19 06:05:57,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:05:57,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:05:57,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:05:57,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742850833] [2022-03-19 06:05:57,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:05:57,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:05:57,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:05:57,575 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:05:57,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 06:05:57,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:05:57,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:05:57,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 06:05:57,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:06:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 06:06:03,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:06:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 06:06:07,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:06:07,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575068627] [2022-03-19 06:06:07,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:06:07,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742850833] [2022-03-19 06:06:07,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742850833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:06:07,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:06:07,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-03-19 06:06:07,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:06:07,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1729432992] [2022-03-19 06:06:07,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1729432992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:06:07,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:06:07,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:06:07,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358277077] [2022-03-19 06:06:07,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:06:07,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:06:07,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:06:07,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:06:07,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:06:07,191 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:06:08,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:06:08,959 INFO L93 Difference]: Finished difference Result 125 states and 138 transitions. [2022-03-19 06:06:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 06:06:08,960 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 48 [2022-03-19 06:06:08,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:06:08,961 INFO L225 Difference]: With dead ends: 125 [2022-03-19 06:06:08,961 INFO L226 Difference]: Without dead ends: 123 [2022-03-19 06:06:08,961 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-03-19 06:06:08,962 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 06:06:08,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 240 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 06:06:08,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-19 06:06:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2022-03-19 06:06:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 89 states have internal predecessors, (98), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 06:06:08,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2022-03-19 06:06:08,991 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 48 [2022-03-19 06:06:08,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:06:08,991 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2022-03-19 06:06:08,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:06:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2022-03-19 06:06:08,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 06:06:08,992 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:06:08,992 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:06:09,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 06:06:09,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 06:06:09,207 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:06:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:06:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1547206899, now seen corresponding path program 9 times [2022-03-19 06:06:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:06:09,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1973726145] [2022-03-19 06:06:09,211 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:06:09,211 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:06:09,211 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:06:09,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1547206899, now seen corresponding path program 10 times [2022-03-19 06:06:09,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:06:09,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45131628] [2022-03-19 06:06:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:06:09,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:06:09,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:06:09,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920002847] [2022-03-19 06:06:09,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:06:09,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:06:09,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:06:09,221 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:06:09,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 06:06:09,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:06:09,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:06:09,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 06:06:09,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:11:53,508 WARN L232 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-19 06:12:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 06:12:30,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:12:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 06:12:43,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:12:43,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45131628] [2022-03-19 06:12:43,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:12:43,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920002847] [2022-03-19 06:12:43,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920002847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:12:43,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:12:43,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 21 [2022-03-19 06:12:43,321 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:12:43,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1973726145] [2022-03-19 06:12:43,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1973726145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:12:43,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:12:43,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:12:43,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951916141] [2022-03-19 06:12:43,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:12:43,322 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:12:43,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:12:43,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:12:43,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=345, Unknown=3, NotChecked=0, Total=420 [2022-03-19 06:12:43,323 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:12:48,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 06:12:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:12:50,601 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2022-03-19 06:12:50,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 06:12:50,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 48 [2022-03-19 06:12:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:12:50,602 INFO L225 Difference]: With dead ends: 126 [2022-03-19 06:12:50,602 INFO L226 Difference]: Without dead ends: 124 [2022-03-19 06:12:50,603 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=86, Invalid=417, Unknown=3, NotChecked=0, Total=506 [2022-03-19 06:12:50,603 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:12:50,603 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 313 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 323 Invalid, 0 Unknown, 14 Unchecked, 7.1s Time] [2022-03-19 06:12:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-19 06:12:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 112. [2022-03-19 06:12:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 89 states have internal predecessors, (98), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 06:12:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2022-03-19 06:12:50,626 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 48 [2022-03-19 06:12:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:12:50,627 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2022-03-19 06:12:50,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:12:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2022-03-19 06:12:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 06:12:50,627 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:12:50,627 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:12:50,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 06:12:50,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 06:12:50,832 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:12:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:12:50,832 INFO L85 PathProgramCache]: Analyzing trace with hash -746811343, now seen corresponding path program 11 times [2022-03-19 06:12:50,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:12:50,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [535981120] [2022-03-19 06:12:50,834 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:12:50,834 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:12:50,834 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:12:50,835 INFO L85 PathProgramCache]: Analyzing trace with hash -746811343, now seen corresponding path program 12 times [2022-03-19 06:12:50,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:12:50,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525175341] [2022-03-19 06:12:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:12:50,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:12:50,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:12:50,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508317393] [2022-03-19 06:12:50,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:12:50,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:12:50,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:12:50,842 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:12:50,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 06:12:50,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 06:12:50,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:12:50,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 06:12:50,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:13:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 06:13:05,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:13:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 06:13:09,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:13:09,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525175341] [2022-03-19 06:13:09,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:13:09,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508317393] [2022-03-19 06:13:09,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508317393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:13:09,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:13:09,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 27 [2022-03-19 06:13:09,556 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:13:09,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [535981120] [2022-03-19 06:13:09,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [535981120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:13:09,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:13:09,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 06:13:09,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006815684] [2022-03-19 06:13:09,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:13:09,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 06:13:09,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:13:09,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 06:13:09,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-03-19 06:13:09,557 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:13:10,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:13:10,878 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2022-03-19 06:13:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 06:13:10,878 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 48 [2022-03-19 06:13:10,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:13:10,879 INFO L225 Difference]: With dead ends: 135 [2022-03-19 06:13:10,879 INFO L226 Difference]: Without dead ends: 133 [2022-03-19 06:13:10,880 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-19 06:13:10,880 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 06:13:10,880 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 376 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 06:13:10,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-19 06:13:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 122. [2022-03-19 06:13:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 97 states have internal predecessors, (107), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 06:13:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2022-03-19 06:13:10,907 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 48 [2022-03-19 06:13:10,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:13:10,907 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2022-03-19 06:13:10,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:13:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2022-03-19 06:13:10,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 06:13:10,908 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:13:10,908 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:13:10,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-19 06:13:11,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:13:11,112 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:13:11,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:13:11,112 INFO L85 PathProgramCache]: Analyzing trace with hash 62535283, now seen corresponding path program 13 times [2022-03-19 06:13:11,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:13:11,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [727418306] [2022-03-19 06:13:11,115 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:13:11,115 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:13:11,115 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:13:11,116 INFO L85 PathProgramCache]: Analyzing trace with hash 62535283, now seen corresponding path program 14 times [2022-03-19 06:13:11,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:13:11,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185028145] [2022-03-19 06:13:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:13:11,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:13:11,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:13:11,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94167103] [2022-03-19 06:13:11,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:13:11,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:13:11,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:13:11,123 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:13:11,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 06:13:11,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:13:11,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:13:11,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 06:13:11,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:13:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 06:13:24,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:13:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 06:13:48,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:13:48,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185028145] [2022-03-19 06:13:48,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:13:48,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94167103] [2022-03-19 06:13:48,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94167103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:13:48,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:13:48,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2022-03-19 06:13:48,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:13:48,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [727418306] [2022-03-19 06:13:48,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [727418306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:13:48,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:13:48,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 06:13:48,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141510522] [2022-03-19 06:13:48,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:13:48,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 06:13:48,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:13:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 06:13:48,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=347, Unknown=2, NotChecked=0, Total=420 [2022-03-19 06:13:48,013 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:13:53,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 06:13:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:13:54,061 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2022-03-19 06:13:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 06:13:54,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 48 [2022-03-19 06:13:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:13:54,063 INFO L225 Difference]: With dead ends: 136 [2022-03-19 06:13:54,063 INFO L226 Difference]: Without dead ends: 134 [2022-03-19 06:13:54,063 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=88, Invalid=462, Unknown=2, NotChecked=0, Total=552 [2022-03-19 06:13:54,063 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:13:54,064 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 228 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 371 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-03-19 06:13:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-19 06:13:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2022-03-19 06:13:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 89 states have internal predecessors, (98), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 06:13:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2022-03-19 06:13:54,091 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 48 [2022-03-19 06:13:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:13:54,092 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2022-03-19 06:13:54,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:13:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2022-03-19 06:13:54,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 06:13:54,092 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:13:54,093 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:13:54,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-19 06:13:54,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:13:54,296 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:13:54,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:13:54,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1247333363, now seen corresponding path program 15 times [2022-03-19 06:13:54,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:13:54,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [520555633] [2022-03-19 06:13:54,299 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:13:54,299 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:13:54,299 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:13:54,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1247333363, now seen corresponding path program 16 times [2022-03-19 06:13:54,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:13:54,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631640275] [2022-03-19 06:13:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:13:54,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:13:54,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:13:54,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842993078] [2022-03-19 06:13:54,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:13:54,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:13:54,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:13:54,306 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:13:54,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 06:13:54,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:13:54,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:13:54,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 06:13:54,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:13:55,823 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 06:13:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 06:13:57,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:13:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 06:13:59,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:13:59,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631640275] [2022-03-19 06:13:59,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:13:59,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842993078] [2022-03-19 06:13:59,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842993078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:13:59,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:13:59,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2022-03-19 06:13:59,310 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:13:59,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [520555633] [2022-03-19 06:13:59,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [520555633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:13:59,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:13:59,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:13:59,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290896039] [2022-03-19 06:13:59,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:13:59,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:13:59,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:13:59,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:13:59,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:13:59,312 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 06:14:09,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 06:14:10,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:14:10,024 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2022-03-19 06:14:10,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 06:14:10,024 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2022-03-19 06:14:10,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:14:10,026 INFO L225 Difference]: With dead ends: 161 [2022-03-19 06:14:10,026 INFO L226 Difference]: Without dead ends: 159 [2022-03-19 06:14:10,026 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-03-19 06:14:10,027 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-19 06:14:10,027 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 317 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 145 Invalid, 1 Unknown, 22 Unchecked, 3.6s Time] [2022-03-19 06:14:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-19 06:14:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2022-03-19 06:14:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 103 states have (on average 1.145631067961165) internal successors, (118), 109 states have internal predecessors, (118), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 06:14:10,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2022-03-19 06:14:10,060 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 48 [2022-03-19 06:14:10,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:14:10,061 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2022-03-19 06:14:10,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 06:14:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2022-03-19 06:14:10,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 06:14:10,062 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:14:10,062 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:14:10,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-19 06:14:10,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 06:14:10,262 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:14:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:14:10,263 INFO L85 PathProgramCache]: Analyzing trace with hash -921054650, now seen corresponding path program 7 times [2022-03-19 06:14:10,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:14:10,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1660030369] [2022-03-19 06:14:10,264 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:14:10,265 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:14:10,265 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:14:10,265 INFO L85 PathProgramCache]: Analyzing trace with hash -921054650, now seen corresponding path program 8 times [2022-03-19 06:14:10,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:14:10,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394487411] [2022-03-19 06:14:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:14:10,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:14:10,270 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:14:10,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353068305] [2022-03-19 06:14:10,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:14:10,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:14:10,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:14:10,271 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:14:10,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 06:14:10,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:14:10,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:14:10,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 06:14:10,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:14:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:14:10,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:14:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 06:14:10,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:14:10,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394487411] [2022-03-19 06:14:10,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:14:10,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353068305] [2022-03-19 06:14:10,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353068305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:14:10,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:14:10,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 06:14:10,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:14:10,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1660030369] [2022-03-19 06:14:10,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1660030369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:14:10,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:14:10,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:14:10,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252008541] [2022-03-19 06:14:10,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:14:10,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 06:14:10,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:14:10,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 06:14:10,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:14:10,540 INFO L87 Difference]: Start difference. First operand 134 states and 152 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:14:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:14:10,631 INFO L93 Difference]: Finished difference Result 172 states and 197 transitions. [2022-03-19 06:14:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:14:10,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 58 [2022-03-19 06:14:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:14:10,635 INFO L225 Difference]: With dead ends: 172 [2022-03-19 06:14:10,635 INFO L226 Difference]: Without dead ends: 165 [2022-03-19 06:14:10,635 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:14:10,636 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 18 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:14:10,636 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 105 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:14:10,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-19 06:14:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 154. [2022-03-19 06:14:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 121 states have (on average 1.140495867768595) internal successors, (138), 125 states have internal predecessors, (138), 19 states have call successors, (19), 14 states have call predecessors, (19), 13 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 06:14:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 174 transitions. [2022-03-19 06:14:10,680 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 174 transitions. Word has length 58 [2022-03-19 06:14:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:14:10,680 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 174 transitions. [2022-03-19 06:14:10,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:14:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 174 transitions. [2022-03-19 06:14:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 06:14:10,681 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:14:10,681 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:14:10,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 06:14:10,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 06:14:10,888 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:14:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:14:10,888 INFO L85 PathProgramCache]: Analyzing trace with hash -919267190, now seen corresponding path program 7 times [2022-03-19 06:14:10,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:14:10,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1066313634] [2022-03-19 06:14:10,890 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:14:10,890 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:14:10,890 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:14:10,890 INFO L85 PathProgramCache]: Analyzing trace with hash -919267190, now seen corresponding path program 8 times [2022-03-19 06:14:10,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:14:10,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248564412] [2022-03-19 06:14:10,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:14:10,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:14:10,895 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:14:10,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149465132] [2022-03-19 06:14:10,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:14:10,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:14:10,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:14:10,896 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:14:10,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 06:14:10,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:14:10,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:14:10,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 06:14:10,943 INFO L286 TraceCheckSpWp]: Computing forward predicates...