/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/hard-u_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 14:43:04,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 14:43:04,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 14:43:04,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 14:43:04,940 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 14:43:04,974 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 14:43:04,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 14:43:04,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 14:43:04,975 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 14:43:04,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 14:43:04,976 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 14:43:04,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 14:43:04,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 14:43:04,977 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 14:43:04,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 14:43:04,978 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 14:43:04,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 14:43:04,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 14:43:04,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 14:43:04,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 14:43:04,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 14:43:04,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 14:43:04,978 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 14:43:04,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 14:43:04,978 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 14:43:04,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 14:43:04,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 14:43:04,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 14:43:04,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 14:43:04,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 14:43:04,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 14:43:04,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 14:43:04,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 14:43:04,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 14:43:04,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 14:43:04,980 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 14:43:04,980 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 14:43:04,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 14:43:04,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 14:43:05,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 14:43:05,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 14:43:05,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 14:43:05,184 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 14:43:05,185 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 14:43:05,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2022-03-18 14:43:05,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fedf70b44/c7856b31fd764b6c80748e86f6e6f018/FLAG9417caba2 [2022-03-18 14:43:05,553 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 14:43:05,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2022-03-18 14:43:05,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fedf70b44/c7856b31fd764b6c80748e86f6e6f018/FLAG9417caba2 [2022-03-18 14:43:05,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fedf70b44/c7856b31fd764b6c80748e86f6e6f018 [2022-03-18 14:43:05,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 14:43:05,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 14:43:05,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 14:43:05,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 14:43:05,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 14:43:05,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:43:05" (1/1) ... [2022-03-18 14:43:05,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15eed8a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:05, skipping insertion in model container [2022-03-18 14:43:05,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:43:05" (1/1) ... [2022-03-18 14:43:05,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 14:43:05,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 14:43:05,732 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/hard-u_unwindbound100.c[537,550] [2022-03-18 14:43:05,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 14:43:05,761 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 14:43:05,769 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/hard-u_unwindbound100.c[537,550] [2022-03-18 14:43:05,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 14:43:05,786 INFO L208 MainTranslator]: Completed translation [2022-03-18 14:43:05,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:05 WrapperNode [2022-03-18 14:43:05,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 14:43:05,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 14:43:05,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 14:43:05,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 14:43:05,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:05" (1/1) ... [2022-03-18 14:43:05,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:05" (1/1) ... [2022-03-18 14:43:05,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:05" (1/1) ... [2022-03-18 14:43:05,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:05" (1/1) ... [2022-03-18 14:43:05,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:05" (1/1) ... [2022-03-18 14:43:05,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:05" (1/1) ... [2022-03-18 14:43:05,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:05" (1/1) ... [2022-03-18 14:43:05,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 14:43:05,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 14:43:05,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 14:43:05,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 14:43:05,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:05" (1/1) ... [2022-03-18 14:43:05,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 14:43:05,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:43:05,854 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 14:43:05,864 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 14:43:05,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 14:43:05,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 14:43:05,888 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 14:43:05,888 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 14:43:05,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 14:43:05,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 14:43:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 14:43:05,928 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 14:43:05,929 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 14:43:06,090 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 14:43:06,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 14:43:06,094 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 14:43:06,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:43:06 BoogieIcfgContainer [2022-03-18 14:43:06,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 14:43:06,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 14:43:06,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 14:43:06,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 14:43:06,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:43:05" (1/3) ... [2022-03-18 14:43:06,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b486759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:43:06, skipping insertion in model container [2022-03-18 14:43:06,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:43:05" (2/3) ... [2022-03-18 14:43:06,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b486759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:43:06, skipping insertion in model container [2022-03-18 14:43:06,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:43:06" (3/3) ... [2022-03-18 14:43:06,111 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound100.c [2022-03-18 14:43:06,114 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 14:43:06,114 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 14:43:06,157 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 14:43:06,168 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 14:43:06,169 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 14:43:06,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 14:43:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 14:43:06,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:43:06,183 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 14:43:06,183 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:43:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:43:06,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2022-03-18 14:43:06,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:43:06,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505189953] [2022-03-18 14:43:06,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:06,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:43:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:06,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 14:43:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:06,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 14:43:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:06,338 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 14:43:06,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:43:06,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505189953] [2022-03-18 14:43:06,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505189953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:43:06,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:43:06,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 14:43:06,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188744935] [2022-03-18 14:43:06,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:43:06,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 14:43:06,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:43:06,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 14:43:06,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 14:43:06,366 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 14:43:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:43:06,462 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-03-18 14:43:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 14:43:06,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 18 [2022-03-18 14:43:06,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:43:06,469 INFO L225 Difference]: With dead ends: 66 [2022-03-18 14:43:06,469 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 14:43:06,471 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 14:43:06,475 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:43:06,476 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:43:06,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 14:43:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-18 14:43:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 14:43:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-18 14:43:06,505 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-18 14:43:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:43:06,505 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-18 14:43:06,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 14:43:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-18 14:43:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 14:43:06,506 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:43:06,507 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 14:43:06,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 14:43:06,508 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:43:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:43:06,509 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2022-03-18 14:43:06,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:43:06,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566846903] [2022-03-18 14:43:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:06,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:43:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:06,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 14:43:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:06,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 14:43:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:06,601 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 14:43:06,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:43:06,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566846903] [2022-03-18 14:43:06,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566846903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:43:06,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:43:06,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 14:43:06,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048673142] [2022-03-18 14:43:06,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:43:06,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 14:43:06,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:43:06,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 14:43:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 14:43:06,603 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 14:43:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:43:06,779 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-03-18 14:43:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 14:43:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 14:43:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:43:06,780 INFO L225 Difference]: With dead ends: 47 [2022-03-18 14:43:06,781 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 14:43:06,781 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 14:43:06,782 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:43:06,782 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:43:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 14:43:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-03-18 14:43:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 14:43:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-18 14:43:06,789 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-03-18 14:43:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:43:06,789 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-18 14:43:06,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 14:43:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-18 14:43:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 14:43:06,790 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:43:06,790 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:43:06,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 14:43:06,790 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:43:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:43:06,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2022-03-18 14:43:06,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:43:06,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139107106] [2022-03-18 14:43:06,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:06,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:43:06,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:43:06,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761036955] [2022-03-18 14:43:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:06,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:06,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:43:06,802 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 14:43:06,803 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 14:43:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:06,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 14:43:06,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:43:06,903 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 14:43:06,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:43:06,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:43:06,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139107106] [2022-03-18 14:43:06,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:43:06,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761036955] [2022-03-18 14:43:06,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761036955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:43:06,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:43:06,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 14:43:06,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058401739] [2022-03-18 14:43:06,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:43:06,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 14:43:06,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:43:06,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 14:43:06,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 14:43:06,906 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 14:43:06,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:43:06,916 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-03-18 14:43:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 14:43:06,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 20 [2022-03-18 14:43:06,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:43:06,917 INFO L225 Difference]: With dead ends: 52 [2022-03-18 14:43:06,918 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 14:43:06,918 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 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 14:43:06,919 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:43:06,919 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:43:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 14:43:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-18 14:43:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 14:43:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-03-18 14:43:06,925 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-03-18 14:43:06,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:43:06,925 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-03-18 14:43:06,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 14:43:06,925 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-03-18 14:43:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 14:43:06,926 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:43:06,926 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] [2022-03-18 14:43:06,957 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 14:43:07,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:07,144 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:43:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:43:07,144 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2022-03-18 14:43:07,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:43:07,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479897125] [2022-03-18 14:43:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:07,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:43:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:07,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 14:43:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:07,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 14:43:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:07,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 14:43:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:07,218 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 14:43:07,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:43:07,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479897125] [2022-03-18 14:43:07,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479897125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:43:07,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:43:07,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 14:43:07,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334680200] [2022-03-18 14:43:07,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:43:07,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 14:43:07,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:43:07,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 14:43:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 14:43:07,220 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 14:43:07,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:43:07,331 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-18 14:43:07,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 14:43:07,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-18 14:43:07,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:43:07,333 INFO L225 Difference]: With dead ends: 52 [2022-03-18 14:43:07,333 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 14:43:07,333 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 14:43:07,337 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:43:07,338 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:43:07,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 14:43:07,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-18 14:43:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 14:43:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-18 14:43:07,344 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-03-18 14:43:07,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:43:07,345 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-18 14:43:07,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 14:43:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-18 14:43:07,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 14:43:07,345 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:43:07,346 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:43:07,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 14:43:07,346 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:43:07,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:43:07,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2022-03-18 14:43:07,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:43:07,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769757822] [2022-03-18 14:43:07,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:07,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:43:07,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:43:07,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487817003] [2022-03-18 14:43:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:07,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:07,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:43:07,358 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 14:43:07,358 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 14:43:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:07,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 14:43:07,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:43:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 14:43:07,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:43:07,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:43:07,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769757822] [2022-03-18 14:43:07,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:43:07,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487817003] [2022-03-18 14:43:07,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487817003] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:43:07,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:43:07,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 14:43:07,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395267572] [2022-03-18 14:43:07,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:43:07,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:43:07,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:43:07,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:43:07,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 14:43:07,460 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 14:43:09,495 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 14:43:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:43:09,697 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-03-18 14:43:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 14:43:09,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-18 14:43:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:43:09,698 INFO L225 Difference]: With dead ends: 59 [2022-03-18 14:43:09,698 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 14:43:09,699 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 14:43:09,699 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 14:43:09,700 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 14:43:09,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 14:43:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-18 14:43:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 14:43:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-03-18 14:43:09,706 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-03-18 14:43:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:43:09,706 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-03-18 14:43:09,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 14:43:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-03-18 14:43:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 14:43:09,707 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:43:09,707 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:43:09,747 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 14:43:09,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:09,908 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:43:09,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:43:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2022-03-18 14:43:09,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:43:09,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527695416] [2022-03-18 14:43:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:09,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:43:09,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:43:09,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078327263] [2022-03-18 14:43:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:09,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:09,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:43:09,927 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 14:43:09,939 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 14:43:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:09,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 14:43:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:43:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 14:43:10,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:43:10,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:43:10,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527695416] [2022-03-18 14:43:10,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:43:10,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078327263] [2022-03-18 14:43:10,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078327263] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:43:10,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:43:10,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 14:43:10,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595407669] [2022-03-18 14:43:10,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:43:10,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:43:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:43:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:43:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 14:43:10,124 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 14:43:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:43:10,153 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-03-18 14:43:10,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 14:43:10,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-03-18 14:43:10,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:43:10,154 INFO L225 Difference]: With dead ends: 76 [2022-03-18 14:43:10,154 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 14:43:10,154 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 14:43:10,155 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:43:10,155 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:43:10,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 14:43:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-18 14:43:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 14:43:10,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-03-18 14:43:10,162 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-03-18 14:43:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:43:10,162 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-03-18 14:43:10,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 14:43:10,162 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-03-18 14:43:10,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 14:43:10,163 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:43:10,163 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:43:10,181 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 14:43:10,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:10,379 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:43:10,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:43:10,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2022-03-18 14:43:10,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:43:10,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010480332] [2022-03-18 14:43:10,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:10,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:43:10,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:43:10,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742601520] [2022-03-18 14:43:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:10,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:10,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:43:10,401 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 14:43:10,403 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 14:43:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:10,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 14:43:10,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:43:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 14:43:10,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:43:10,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:43:10,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010480332] [2022-03-18 14:43:10,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:43:10,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742601520] [2022-03-18 14:43:10,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742601520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:43:10,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:43:10,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 14:43:10,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503823452] [2022-03-18 14:43:10,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:43:10,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 14:43:10,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:43:10,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 14:43:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 14:43:10,591 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 14:43:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:43:11,052 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-03-18 14:43:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 14:43:11,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-18 14:43:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:43:11,060 INFO L225 Difference]: With dead ends: 82 [2022-03-18 14:43:11,060 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 14:43:11,061 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 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 14:43:11,061 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 14:43:11,061 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 189 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 14:43:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 14:43:11,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-18 14:43:11,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 14:43:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-03-18 14:43:11,068 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-03-18 14:43:11,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:43:11,068 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-03-18 14:43:11,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 14:43:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-03-18 14:43:11,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 14:43:11,069 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:43:11,069 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:43:11,086 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 14:43:11,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:11,284 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:43:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:43:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2022-03-18 14:43:11,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:43:11,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244961553] [2022-03-18 14:43:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:11,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:43:11,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:43:11,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622120986] [2022-03-18 14:43:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:11,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:11,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:43:11,303 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 14:43:11,304 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 14:43:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:11,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 14:43:11,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:43:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 14:43:11,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:43:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 14:43:11,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:43:11,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244961553] [2022-03-18 14:43:11,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:43:11,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622120986] [2022-03-18 14:43:11,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622120986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:43:11,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:43:11,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 14:43:11,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208261423] [2022-03-18 14:43:11,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:43:11,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 14:43:11,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:43:11,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 14:43:11,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 14:43:11,511 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-18 14:43:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:43:11,609 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2022-03-18 14:43:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 14:43:11,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-03-18 14:43:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:43:11,611 INFO L225 Difference]: With dead ends: 160 [2022-03-18 14:43:11,611 INFO L226 Difference]: Without dead ends: 146 [2022-03-18 14:43:11,611 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 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 14:43:11,612 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 67 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:43:11,612 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 224 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:43:11,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-18 14:43:11,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-03-18 14:43:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 92 states have internal predecessors, (107), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-18 14:43:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-03-18 14:43:11,635 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 38 [2022-03-18 14:43:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:43:11,635 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-03-18 14:43:11,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-18 14:43:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-03-18 14:43:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 14:43:11,636 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:43:11,636 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:43:11,652 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 14:43:11,852 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:11,852 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:43:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:43:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2022-03-18 14:43:11,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:43:11,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350639400] [2022-03-18 14:43:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:11,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:43:11,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:43:11,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078170890] [2022-03-18 14:43:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:11,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:11,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:43:11,862 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 14:43:11,885 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 14:43:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:11,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 14:43:11,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:43:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 14:43:12,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:43:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 14:43:12,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:43:12,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350639400] [2022-03-18 14:43:12,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:43:12,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078170890] [2022-03-18 14:43:12,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078170890] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 14:43:12,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:43:12,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-18 14:43:12,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515414761] [2022-03-18 14:43:12,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:43:12,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 14:43:12,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:43:12,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 14:43:12,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-18 14:43:12,404 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 14:43:14,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:43:16,482 WARN L534 Checker$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 14:43:18,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:43:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:43:19,151 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2022-03-18 14:43:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 14:43:19,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-03-18 14:43:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:43:19,152 INFO L225 Difference]: With dead ends: 162 [2022-03-18 14:43:19,152 INFO L226 Difference]: Without dead ends: 160 [2022-03-18 14:43:19,153 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-18 14:43:19,153 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-03-18 14:43:19,153 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 176 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2022-03-18 14:43:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-18 14:43:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-03-18 14:43:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 104 states have internal predecessors, (118), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-18 14:43:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-03-18 14:43:19,164 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 46 [2022-03-18 14:43:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:43:19,164 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-03-18 14:43:19,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 14:43:19,165 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-03-18 14:43:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 14:43:19,165 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:43:19,165 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:43:19,179 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 14:43:19,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:19,370 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:43:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:43:19,371 INFO L85 PathProgramCache]: Analyzing trace with hash -399036107, now seen corresponding path program 1 times [2022-03-18 14:43:19,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:43:19,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274921912] [2022-03-18 14:43:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:19,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:43:19,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:43:19,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283515390] [2022-03-18 14:43:19,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:19,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:19,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:43:19,399 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 14:43:19,400 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 14:43:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:43:19,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 14:43:19,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:43:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 14:43:19,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:43:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 14:43:19,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:43:19,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274921912] [2022-03-18 14:43:19,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:43:19,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283515390] [2022-03-18 14:43:19,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283515390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:43:19,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:43:19,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-18 14:43:19,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621101237] [2022-03-18 14:43:19,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:43:19,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 14:43:19,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:43:19,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 14:43:19,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 14:43:19,711 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-18 14:43:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:43:19,883 INFO L93 Difference]: Finished difference Result 281 states and 346 transitions. [2022-03-18 14:43:19,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 14:43:19,884 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-03-18 14:43:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:43:19,885 INFO L225 Difference]: With dead ends: 281 [2022-03-18 14:43:19,885 INFO L226 Difference]: Without dead ends: 257 [2022-03-18 14:43:19,886 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-18 14:43:19,886 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 96 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:43:19,886 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 330 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:43:19,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-18 14:43:19,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-03-18 14:43:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 160 states have (on average 1.2) internal successors, (192), 172 states have internal predecessors, (192), 59 states have call successors, (59), 31 states have call predecessors, (59), 30 states have return successors, (54), 46 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-18 14:43:19,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 305 transitions. [2022-03-18 14:43:19,900 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 305 transitions. Word has length 50 [2022-03-18 14:43:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:43:19,900 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 305 transitions. [2022-03-18 14:43:19,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-18 14:43:19,901 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 305 transitions. [2022-03-18 14:43:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 14:43:19,901 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:43:19,901 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:43:19,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 14:43:20,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:20,117 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:43:20,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:43:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash -397308229, now seen corresponding path program 1 times [2022-03-18 14:43:20,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:43:20,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68666454] [2022-03-18 14:43:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:20,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:43:20,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:43:20,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254227969] [2022-03-18 14:43:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:43:20,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:43:20,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:43:20,143 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 14:43:20,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process