/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 15:36:42,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 15:36:42,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 15:36:42,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 15:36:42,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 15:36:42,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 15:36:42,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 15:36:42,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-18 15:36:42,641 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 15:36:42,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 15:36:42,642 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 15:36:42,642 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 15:36:42,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 15:36:42,643 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 15:36:42,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 15:36:42,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 15:36:42,646 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 15:36:42,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 15:36:42,646 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 15:36:42,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 15:36:42,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 15:36:42,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 15:36:42,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 15:36:42,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 15:36:42,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 15:36:42,647 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 15:36:42,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 15:36:42,647 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 15:36:42,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 15:36:42,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 15:36:42,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 15:36:42,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 15:36:42,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 15:36:42,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 15:36:42,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 15:36:42,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 15:36:42,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 15:36:42,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 15:36:42,649 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 15:36:42,649 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 15:36:42,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 15:36:42,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 15:36:42,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 15:36:42,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 15:36:42,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 15:36:42,835 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 15:36:42,836 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 15:36:42,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2022-03-18 15:36:42,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27e97ac9d/eeb4ed14a08e4abfabd3c5b6b799959d/FLAG084e0bfe4 [2022-03-18 15:36:43,205 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 15:36:43,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2022-03-18 15:36:43,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27e97ac9d/eeb4ed14a08e4abfabd3c5b6b799959d/FLAG084e0bfe4 [2022-03-18 15:36:43,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27e97ac9d/eeb4ed14a08e4abfabd3c5b6b799959d [2022-03-18 15:36:43,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 15:36:43,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 15:36:43,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 15:36:43,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 15:36:43,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 15:36:43,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:36:43" (1/1) ... [2022-03-18 15:36:43,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18bc20f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:36:43, skipping insertion in model container [2022-03-18 15:36:43,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:36:43" (1/1) ... [2022-03-18 15:36:43,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 15:36:43,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 15:36:43,778 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_unwindbound100.c[537,550] [2022-03-18 15:36:43,787 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 15:36:43,791 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 15:36:43,800 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_unwindbound100.c[537,550] [2022-03-18 15:36:43,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 15:36:43,823 INFO L208 MainTranslator]: Completed translation [2022-03-18 15:36:43,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:36:43 WrapperNode [2022-03-18 15:36:43,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 15:36:43,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 15:36:43,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 15:36:43,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 15:36:43,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:36:43" (1/1) ... [2022-03-18 15:36:43,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:36:43" (1/1) ... [2022-03-18 15:36:43,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:36:43" (1/1) ... [2022-03-18 15:36:43,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:36:43" (1/1) ... [2022-03-18 15:36:43,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:36:43" (1/1) ... [2022-03-18 15:36:43,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:36:43" (1/1) ... [2022-03-18 15:36:43,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:36:43" (1/1) ... [2022-03-18 15:36:43,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 15:36:43,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 15:36:43,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 15:36:43,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 15:36:43,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:36:43" (1/1) ... [2022-03-18 15:36:43,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 15:36:43,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:36:43,885 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) [2022-03-18 15:36:43,893 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 [2022-03-18 15:36:43,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 15:36:43,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 15:36:43,920 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 15:36:43,921 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 15:36:43,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 15:36:43,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 15:36:43,921 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 15:36:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 15:36:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 15:36:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 15:36:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 15:36:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 15:36:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 15:36:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 15:36:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 15:36:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 15:36:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 15:36:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 15:36:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 15:36:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 15:36:43,973 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 15:36:43,975 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 15:36:44,076 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 15:36:44,080 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 15:36:44,080 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 15:36:44,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:36:44 BoogieIcfgContainer [2022-03-18 15:36:44,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 15:36:44,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 15:36:44,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 15:36:44,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 15:36:44,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 03:36:43" (1/3) ... [2022-03-18 15:36:44,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7048dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:36:44, skipping insertion in model container [2022-03-18 15:36:44,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:36:43" (2/3) ... [2022-03-18 15:36:44,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7048dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:36:44, skipping insertion in model container [2022-03-18 15:36:44,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:36:44" (3/3) ... [2022-03-18 15:36:44,102 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2022-03-18 15:36:44,105 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 15:36:44,105 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 15:36:44,143 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 15:36:44,148 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-03-18 15:36:44,148 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 15:36:44,159 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) [2022-03-18 15:36:44,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 15:36:44,163 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:36:44,163 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 15:36:44,164 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:36:44,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:36:44,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2022-03-18 15:36:44,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:36:44,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121421323] [2022-03-18 15:36:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:44,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:36:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:36:44,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 15:36:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:36:44,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 15:36:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:36:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 15:36:44,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 15:36:44,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121421323] [2022-03-18 15:36:44,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121421323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 15:36:44,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 15:36:44,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 15:36:44,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552697837] [2022-03-18 15:36:44,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 15:36:44,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 15:36:44,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 15:36:44,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 15:36:44,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 15:36:44,364 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) [2022-03-18 15:36:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 15:36:44,428 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-18 15:36:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 15:36:44,430 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 [2022-03-18 15:36:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 15:36:44,441 INFO L225 Difference]: With dead ends: 52 [2022-03-18 15:36:44,441 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 15:36:44,444 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 [2022-03-18 15:36:44,447 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 15:36:44,448 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 15:36:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 15:36:44,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-18 15:36:44,480 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) [2022-03-18 15:36:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-18 15:36:44,481 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-03-18 15:36:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 15:36:44,481 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-18 15:36:44,481 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) [2022-03-18 15:36:44,482 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-18 15:36:44,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 15:36:44,482 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:36:44,483 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 15:36:44,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 15:36:44,483 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:36:44,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:36:44,485 INFO L85 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2022-03-18 15:36:44,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:36:44,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893983724] [2022-03-18 15:36:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:44,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:36:44,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 15:36:44,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045045053] [2022-03-18 15:36:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:44,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:36:44,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:36:44,504 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) [2022-03-18 15:36:44,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 15:36:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:36:44,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 15:36:44,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 15:36:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 15:36:44,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 15:36:44,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 15:36:44,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893983724] [2022-03-18 15:36:44,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 15:36:44,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045045053] [2022-03-18 15:36:44,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045045053] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 15:36:44,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 15:36:44,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 15:36:44,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342623038] [2022-03-18 15:36:44,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 15:36:44,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 15:36:44,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 15:36:44,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 15:36:44,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 15:36:44,669 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) [2022-03-18 15:36:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 15:36:44,684 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-18 15:36:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 15:36:44,686 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 [2022-03-18 15:36:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 15:36:44,690 INFO L225 Difference]: With dead ends: 34 [2022-03-18 15:36:44,690 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 15:36:44,691 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 [2022-03-18 15:36:44,691 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 [2022-03-18 15:36:44,692 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] [2022-03-18 15:36:44,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 15:36:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-18 15:36:44,695 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) [2022-03-18 15:36:44,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-18 15:36:44,696 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-03-18 15:36:44,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 15:36:44,696 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-18 15:36:44,697 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) [2022-03-18 15:36:44,697 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-18 15:36:44,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 15:36:44,697 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:36:44,697 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 15:36:44,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 15:36:44,916 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 [2022-03-18 15:36:44,916 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:36:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:36:44,917 INFO L85 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 1 times [2022-03-18 15:36:44,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:36:44,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687862989] [2022-03-18 15:36:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:44,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:36:44,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 15:36:44,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050962717] [2022-03-18 15:36:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:44,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:36:44,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:36:44,928 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) [2022-03-18 15:36:44,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 15:36:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:36:44,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 15:36:44,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 15:36:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 15:36:45,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 15:36:45,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 15:36:45,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687862989] [2022-03-18 15:36:45,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 15:36:45,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050962717] [2022-03-18 15:36:45,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050962717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 15:36:45,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 15:36:45,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 15:36:45,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789108722] [2022-03-18 15:36:45,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 15:36:45,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 15:36:45,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 15:36:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 15:36:45,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 15:36:45,092 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) [2022-03-18 15:36:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 15:36:45,150 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-03-18 15:36:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 15:36:45,156 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 [2022-03-18 15:36:45,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 15:36:45,157 INFO L225 Difference]: With dead ends: 38 [2022-03-18 15:36:45,157 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 15:36:45,157 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 [2022-03-18 15:36:45,158 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 [2022-03-18 15:36:45,158 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] [2022-03-18 15:36:45,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 15:36:45,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-03-18 15:36:45,164 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) [2022-03-18 15:36:45,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-18 15:36:45,165 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-03-18 15:36:45,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 15:36:45,165 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-18 15:36:45,165 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) [2022-03-18 15:36:45,165 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-18 15:36:45,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 15:36:45,166 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:36:45,166 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] [2022-03-18 15:36:45,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 15:36:45,366 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 [2022-03-18 15:36:45,367 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:36:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:36:45,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1094479982, now seen corresponding path program 1 times [2022-03-18 15:36:45,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:36:45,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445903849] [2022-03-18 15:36:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:45,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:36:45,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 15:36:45,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255189763] [2022-03-18 15:36:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:45,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:36:45,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:36:45,386 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) [2022-03-18 15:36:45,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 15:36:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:36:45,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 15:36:45,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 15:36:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 15:36:45,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 15:36:45,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 15:36:45,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445903849] [2022-03-18 15:36:45,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 15:36:45,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255189763] [2022-03-18 15:36:45,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255189763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 15:36:45,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 15:36:45,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 15:36:45,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915840717] [2022-03-18 15:36:45,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 15:36:45,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 15:36:45,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 15:36:45,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 15:36:45,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 15:36:45,492 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) [2022-03-18 15:36:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 15:36:45,532 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-18 15:36:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 15:36:45,532 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 [2022-03-18 15:36:45,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 15:36:45,533 INFO L225 Difference]: With dead ends: 42 [2022-03-18 15:36:45,533 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 15:36:45,534 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 [2022-03-18 15:36:45,535 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 [2022-03-18 15:36:45,535 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] [2022-03-18 15:36:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 15:36:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-03-18 15:36:45,541 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) [2022-03-18 15:36:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-18 15:36:45,542 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-03-18 15:36:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 15:36:45,543 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-18 15:36:45,543 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) [2022-03-18 15:36:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-18 15:36:45,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 15:36:45,543 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:36:45,544 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] [2022-03-18 15:36:45,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 15:36:45,759 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 [2022-03-18 15:36:45,761 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:36:45,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:36:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 1 times [2022-03-18 15:36:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:36:45,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421190091] [2022-03-18 15:36:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:45,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:36:45,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 15:36:45,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313773352] [2022-03-18 15:36:45,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:45,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:36:45,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:36:45,772 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) [2022-03-18 15:36:45,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 15:36:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:36:45,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 15:36:45,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 15:36:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 15:36:45,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 15:36:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 15:36:45,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 15:36:45,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421190091] [2022-03-18 15:36:45,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 15:36:45,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313773352] [2022-03-18 15:36:45,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313773352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 15:36:45,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 15:36:45,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 15:36:45,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557528166] [2022-03-18 15:36:45,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 15:36:45,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 15:36:45,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 15:36:45,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 15:36:45,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 15:36:45,968 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 15:36:46,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 15:36:46,024 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-03-18 15:36:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 15:36:46,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-03-18 15:36:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 15:36:46,028 INFO L225 Difference]: With dead ends: 70 [2022-03-18 15:36:46,028 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 15:36:46,029 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-18 15:36:46,030 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 15:36:46,030 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 105 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 15:36:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 15:36:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-03-18 15:36:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 15:36:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-03-18 15:36:46,042 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2022-03-18 15:36:46,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 15:36:46,042 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-03-18 15:36:46,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 15:36:46,042 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-03-18 15:36:46,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 15:36:46,043 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:36:46,043 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] [2022-03-18 15:36:46,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 15:36:46,255 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 [2022-03-18 15:36:46,255 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:36:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:36:46,256 INFO L85 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 1 times [2022-03-18 15:36:46,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:36:46,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167572023] [2022-03-18 15:36:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:46,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:36:46,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 15:36:46,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294149676] [2022-03-18 15:36:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:46,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:36:46,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:36:46,274 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) [2022-03-18 15:36:46,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 15:36:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:36:46,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 15:36:46,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 15:36:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 15:36:47,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 15:36:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 15:36:47,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 15:36:47,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167572023] [2022-03-18 15:36:47,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 15:36:47,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294149676] [2022-03-18 15:36:47,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294149676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 15:36:47,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 15:36:47,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-03-18 15:36:47,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580025523] [2022-03-18 15:36:47,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 15:36:47,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 15:36:47,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 15:36:47,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 15:36:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-18 15:36:47,926 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 15:36:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 15:36:48,737 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2022-03-18 15:36:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 15:36:48,739 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-03-18 15:36:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 15:36:48,741 INFO L225 Difference]: With dead ends: 103 [2022-03-18 15:36:48,741 INFO L226 Difference]: Without dead ends: 94 [2022-03-18 15:36:48,742 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-03-18 15:36:48,742 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 15:36:48,743 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 241 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 15:36:48,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-18 15:36:48,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-03-18 15:36:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 73 states have internal predecessors, (83), 14 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 15:36:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2022-03-18 15:36:48,755 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 28 [2022-03-18 15:36:48,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 15:36:48,756 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2022-03-18 15:36:48,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 15:36:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2022-03-18 15:36:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 15:36:48,757 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:36:48,757 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] [2022-03-18 15:36:48,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 15:36:48,959 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 [2022-03-18 15:36:48,960 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:36:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:36:48,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 1 times [2022-03-18 15:36:48,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:36:48,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343970641] [2022-03-18 15:36:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:48,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:36:48,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 15:36:48,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567541091] [2022-03-18 15:36:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:48,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:36:48,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:36:48,975 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) [2022-03-18 15:36:48,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 15:36:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:36:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 15:36:49,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 15:36:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 15:36:49,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 15:36:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 15:36:49,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 15:36:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343970641] [2022-03-18 15:36:49,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 15:36:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567541091] [2022-03-18 15:36:49,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567541091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 15:36:49,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 15:36:49,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-18 15:36:49,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623845401] [2022-03-18 15:36:49,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 15:36:49,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 15:36:49,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 15:36:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 15:36:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 15:36:49,198 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 15:36:51,219 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 [] [2022-03-18 15:36:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 15:36:51,327 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2022-03-18 15:36:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 15:36:51,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-18 15:36:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 15:36:51,328 INFO L225 Difference]: With dead ends: 104 [2022-03-18 15:36:51,328 INFO L226 Difference]: Without dead ends: 89 [2022-03-18 15:36:51,328 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 [2022-03-18 15:36:51,329 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 15:36:51,329 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 15:36:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-18 15:36:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-03-18 15:36:51,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 70 states have internal predecessors, (77), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 15:36:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2022-03-18 15:36:51,337 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 34 [2022-03-18 15:36:51,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 15:36:51,337 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2022-03-18 15:36:51,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 15:36:51,337 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2022-03-18 15:36:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 15:36:51,338 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:36:51,338 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] [2022-03-18 15:36:51,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 15:36:51,547 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 [2022-03-18 15:36:51,547 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:36:51,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:36:51,548 INFO L85 PathProgramCache]: Analyzing trace with hash 539044694, now seen corresponding path program 1 times [2022-03-18 15:36:51,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:36:51,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670407452] [2022-03-18 15:36:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:51,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:36:51,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 15:36:51,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541617113] [2022-03-18 15:36:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:36:51,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:36:51,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:36:51,556 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) [2022-03-18 15:36:51,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 15:36:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 15:36:51,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 15:36:51,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 15:36:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 15:36:55,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 15:36:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 15:36:59,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 15:36:59,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670407452] [2022-03-18 15:36:59,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 15:36:59,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541617113] [2022-03-18 15:36:59,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541617113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 15:36:59,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 15:36:59,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-03-18 15:36:59,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551496973] [2022-03-18 15:36:59,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 15:36:59,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 15:36:59,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 15:36:59,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 15:36:59,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-18 15:36:59,153 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 15:37:03,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 15:37:03,052 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2022-03-18 15:37:03,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 15:37:03,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2022-03-18 15:37:03,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 15:37:03,054 INFO L225 Difference]: With dead ends: 124 [2022-03-18 15:37:03,054 INFO L226 Difference]: Without dead ends: 122 [2022-03-18 15:37:03,054 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-03-18 15:37:03,055 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 15:37:03,055 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 336 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 267 Invalid, 0 Unknown, 22 Unchecked, 0.8s Time] [2022-03-18 15:37:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-18 15:37:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-03-18 15:37:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 96 states have internal predecessors, (104), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 15:37:03,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2022-03-18 15:37:03,078 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 38 [2022-03-18 15:37:03,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 15:37:03,079 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2022-03-18 15:37:03,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 15:37:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2022-03-18 15:37:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 15:37:03,080 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:37:03,080 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] [2022-03-18 15:37:03,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 15:37:03,287 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 [2022-03-18 15:37:03,288 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:37:03,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:37:03,288 INFO L85 PathProgramCache]: Analyzing trace with hash -921054650, now seen corresponding path program 2 times [2022-03-18 15:37:03,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:37:03,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562417426] [2022-03-18 15:37:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:37:03,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:37:03,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 15:37:03,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492954820] [2022-03-18 15:37:03,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 15:37:03,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:37:03,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:37:03,312 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) [2022-03-18 15:37:03,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 15:37:03,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 15:37:03,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 15:37:03,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 15:37:03,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 15:37:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 15:37:03,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 15:37:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 15:37:03,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 15:37:03,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562417426] [2022-03-18 15:37:03,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 15:37:03,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492954820] [2022-03-18 15:37:03,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492954820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 15:37:03,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 15:37:03,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-18 15:37:03,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001985451] [2022-03-18 15:37:03,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 15:37:03,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 15:37:03,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 15:37:03,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 15:37:03,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 15:37:03,579 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-18 15:37:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 15:37:03,735 INFO L93 Difference]: Finished difference Result 300 states and 341 transitions. [2022-03-18 15:37:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 15:37:03,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 58 [2022-03-18 15:37:03,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 15:37:03,759 INFO L225 Difference]: With dead ends: 300 [2022-03-18 15:37:03,759 INFO L226 Difference]: Without dead ends: 293 [2022-03-18 15:37:03,760 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-18 15:37:03,761 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 122 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 15:37:03,762 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 162 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 15:37:03,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-18 15:37:03,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 283. [2022-03-18 15:37:03,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 221 states have (on average 1.1312217194570136) internal successors, (250), 230 states have internal predecessors, (250), 32 states have call successors, (32), 30 states have call predecessors, (32), 29 states have return successors, (30), 22 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-18 15:37:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 312 transitions. [2022-03-18 15:37:03,799 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 312 transitions. Word has length 58 [2022-03-18 15:37:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 15:37:03,799 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 312 transitions. [2022-03-18 15:37:03,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-18 15:37:03,799 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 312 transitions. [2022-03-18 15:37:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 15:37:03,804 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 15:37:03,805 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] [2022-03-18 15:37:03,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 15:37:04,015 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 [2022-03-18 15:37:04,015 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 15:37:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 15:37:04,015 INFO L85 PathProgramCache]: Analyzing trace with hash -919267190, now seen corresponding path program 2 times [2022-03-18 15:37:04,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 15:37:04,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183721674] [2022-03-18 15:37:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 15:37:04,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 15:37:04,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 15:37:04,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629308423] [2022-03-18 15:37:04,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 15:37:04,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 15:37:04,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 15:37:04,029 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) [2022-03-18 15:37:04,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 15:37:04,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 15:37:04,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 15:37:04,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 15:37:04,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 15:37:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 15:37:13,665 INFO L328 TraceCheckSpWp]: Computing backward predicates...