/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/bresenham-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:46:36,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:46:36,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:46:36,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:46:36,706 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 [2022-03-19 23:46:36,727 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:46:36,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:46:36,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:46:36,727 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:46:36,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:46:36,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:46:36,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:46:36,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:46:36,729 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:46:36,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:46:36,729 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:46:36,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:46:36,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:46:36,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:46:36,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:46:36,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:46:36,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:46:36,730 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:46:36,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:46:36,730 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:46:36,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:46:36,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:46:36,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:46:36,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:46:36,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:46:36,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:46:36,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:46:36,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:46:36,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:46:36,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:46:36,731 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:46:36,731 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:46:36,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:46:36,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:46:36,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:46:36,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:46:36,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:46:36,961 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:46:36,961 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:46:36,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-03-19 23:46:37,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f318c9daa/9fcea64f60d7409b9ecd64a48628521e/FLAGa957bf61a [2022-03-19 23:46:37,377 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:46:37,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-03-19 23:46:37,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f318c9daa/9fcea64f60d7409b9ecd64a48628521e/FLAGa957bf61a [2022-03-19 23:46:37,805 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f318c9daa/9fcea64f60d7409b9ecd64a48628521e [2022-03-19 23:46:37,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:46:37,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:46:37,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:46:37,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:46:37,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:46:37,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:46:37" (1/1) ... [2022-03-19 23:46:37,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@244584e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:46:37, skipping insertion in model container [2022-03-19 23:46:37,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:46:37" (1/1) ... [2022-03-19 23:46:37,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:46:37,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:46:37,958 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/bresenham-ll_unwindbound5.c[597,610] [2022-03-19 23:46:37,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:46:37,989 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:46:38,005 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/bresenham-ll_unwindbound5.c[597,610] [2022-03-19 23:46:38,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:46:38,034 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:46:38,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:46:38 WrapperNode [2022-03-19 23:46:38,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:46:38,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:46:38,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:46:38,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:46:38,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:46:38" (1/1) ... [2022-03-19 23:46:38,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:46:38" (1/1) ... [2022-03-19 23:46:38,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:46:38" (1/1) ... [2022-03-19 23:46:38,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:46:38" (1/1) ... [2022-03-19 23:46:38,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:46:38" (1/1) ... [2022-03-19 23:46:38,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:46:38" (1/1) ... [2022-03-19 23:46:38,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:46:38" (1/1) ... [2022-03-19 23:46:38,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:46:38,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:46:38,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:46:38,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:46:38,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:46:38" (1/1) ... [2022-03-19 23:46:38,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:46:38,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:46:38,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 23:46:38,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 23:46:38,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:46:38,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:46:38,144 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:46:38,145 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 23:46:38,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:46:38,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:46:38,146 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:46:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:46:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:46:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:46:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 23:46:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 23:46:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:46:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:46:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:46:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:46:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:46:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:46:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:46:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:46:38,209 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:46:38,210 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:46:38,316 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:46:38,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:46:38,321 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 23:46:38,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:46:38 BoogieIcfgContainer [2022-03-19 23:46:38,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:46:38,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:46:38,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:46:38,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:46:38,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:46:37" (1/3) ... [2022-03-19 23:46:38,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e9b386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:46:38, skipping insertion in model container [2022-03-19 23:46:38,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:46:38" (2/3) ... [2022-03-19 23:46:38,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e9b386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:46:38, skipping insertion in model container [2022-03-19 23:46:38,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:46:38" (3/3) ... [2022-03-19 23:46:38,329 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.c [2022-03-19 23:46:38,333 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:46:38,333 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:46:38,392 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:46:38,408 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 [2022-03-19 23:46:38,408 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:46:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 23:46:38,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 23:46:38,427 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:46:38,428 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:46:38,428 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:46:38,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:46:38,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2022-03-19 23:46:38,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:46:38,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409380271] [2022-03-19 23:46:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:38,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:46:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:46:38,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:46:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:46:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:46:38,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:46:38,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409380271] [2022-03-19 23:46:38,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409380271] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:46:38,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:46:38,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:46:38,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328857726] [2022-03-19 23:46:38,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:46:38,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:46:38,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:46:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:46:38,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:46:38,609 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:46:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:46:38,658 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-03-19 23:46:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:46:38,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 23:46:38,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:46:38,666 INFO L225 Difference]: With dead ends: 45 [2022-03-19 23:46:38,666 INFO L226 Difference]: Without dead ends: 21 [2022-03-19 23:46:38,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:46:38,672 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:46:38,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:46:38,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-19 23:46:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-03-19 23:46:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:46:38,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-03-19 23:46:38,701 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-03-19 23:46:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:46:38,701 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-03-19 23:46:38,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:46:38,702 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-03-19 23:46:38,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 23:46:38,702 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:46:38,702 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:46:38,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:46:38,703 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:46:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:46:38,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2022-03-19 23:46:38,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:46:38,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255259373] [2022-03-19 23:46:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:38,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:46:38,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:46:38,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512456223] [2022-03-19 23:46:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:38,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:38,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:46:38,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:46:38,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:46:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:46:38,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 23:46:38,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:46:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:46:38,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:46:38,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:46:38,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255259373] [2022-03-19 23:46:38,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:46:38,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512456223] [2022-03-19 23:46:38,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512456223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:46:38,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:46:38,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 23:46:38,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070439414] [2022-03-19 23:46:38,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:46:38,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 23:46:38,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:46:38,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 23:46:38,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:46:38,944 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:46:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:46:39,012 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-03-19 23:46:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:46:39,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 23:46:39,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:46:39,016 INFO L225 Difference]: With dead ends: 34 [2022-03-19 23:46:39,016 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 23:46:39,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:46:39,018 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:46:39,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:46:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 23:46:39,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-19 23:46:39,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:46:39,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-03-19 23:46:39,025 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-03-19 23:46:39,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:46:39,025 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-03-19 23:46:39,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:46:39,026 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-03-19 23:46:39,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 23:46:39,026 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:46:39,026 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:46:39,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 23:46:39,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:39,255 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:46:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:46:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 1 times [2022-03-19 23:46:39,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:46:39,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851313750] [2022-03-19 23:46:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:39,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:46:39,270 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:46:39,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217936104] [2022-03-19 23:46:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:39,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:39,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:46:39,272 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:46:39,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:46:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:46:39,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 23:46:39,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:46:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:46:39,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:46:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:46:39,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:46:39,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851313750] [2022-03-19 23:46:39,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:46:39,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217936104] [2022-03-19 23:46:39,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217936104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:46:39,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:46:39,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-19 23:46:39,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509866618] [2022-03-19 23:46:39,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:46:39,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 23:46:39,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:46:39,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 23:46:39,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:46:39,730 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:46:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:46:40,003 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-03-19 23:46:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 23:46:40,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2022-03-19 23:46:40,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:46:40,005 INFO L225 Difference]: With dead ends: 45 [2022-03-19 23:46:40,005 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 23:46:40,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-19 23:46:40,007 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:46:40,007 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 110 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:46:40,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 23:46:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-03-19 23:46:40,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 23:46:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-19 23:46:40,016 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-03-19 23:46:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:46:40,016 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-19 23:46:40,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:46:40,017 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-19 23:46:40,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 23:46:40,018 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:46:40,018 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:46:40,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 23:46:40,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 23:46:40,232 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:46:40,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:46:40,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 1 times [2022-03-19 23:46:40,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:46:40,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357252229] [2022-03-19 23:46:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:40,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:46:40,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:46:40,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718522842] [2022-03-19 23:46:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:40,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:40,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:46:40,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:46:40,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:46:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:46:40,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:46:40,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:46:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:46:40,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:46:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:46:40,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:46:40,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357252229] [2022-03-19 23:46:40,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:46:40,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718522842] [2022-03-19 23:46:40,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718522842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:46:40,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:46:40,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 23:46:40,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320843013] [2022-03-19 23:46:40,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:46:40,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:46:40,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:46:40,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:46:40,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:46:40,430 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 23:46:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:46:40,501 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-03-19 23:46:40,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 23:46:40,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-03-19 23:46:40,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:46:40,504 INFO L225 Difference]: With dead ends: 77 [2022-03-19 23:46:40,504 INFO L226 Difference]: Without dead ends: 71 [2022-03-19 23:46:40,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:46:40,508 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:46:40,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:46:40,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-19 23:46:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-03-19 23:46:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 23:46:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-03-19 23:46:40,528 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-03-19 23:46:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:46:40,528 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-03-19 23:46:40,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 23:46:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-03-19 23:46:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 23:46:40,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:46:40,529 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:46:40,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:46:40,730 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:40,730 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:46:40,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:46:40,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1132431350, now seen corresponding path program 1 times [2022-03-19 23:46:40,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:46:40,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796749712] [2022-03-19 23:46:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:40,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:46:40,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:46:40,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214259320] [2022-03-19 23:46:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:40,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:40,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:46:40,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:46:40,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:46:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:46:40,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 23:46:40,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:46:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:46:41,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:46:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:46:41,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:46:41,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796749712] [2022-03-19 23:46:41,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:46:41,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214259320] [2022-03-19 23:46:41,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214259320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:46:41,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:46:41,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-19 23:46:41,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335203354] [2022-03-19 23:46:41,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:46:41,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 23:46:41,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:46:41,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 23:46:41,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-19 23:46:41,617 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:46:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:46:42,175 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-03-19 23:46:42,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 23:46:42,175 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-03-19 23:46:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:46:42,176 INFO L225 Difference]: With dead ends: 85 [2022-03-19 23:46:42,176 INFO L226 Difference]: Without dead ends: 77 [2022-03-19 23:46:42,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 23:46:42,178 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:46:42,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 167 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 173 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-03-19 23:46:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-19 23:46:42,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-03-19 23:46:42,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 23:46:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-03-19 23:46:42,190 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29 [2022-03-19 23:46:42,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:46:42,190 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-03-19 23:46:42,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:46:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-03-19 23:46:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 23:46:42,191 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:46:42,191 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:46:42,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 23:46:42,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:42,407 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:46:42,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:46:42,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1565736524, now seen corresponding path program 1 times [2022-03-19 23:46:42,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:46:42,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933255025] [2022-03-19 23:46:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:46:42,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:46:42,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394774584] [2022-03-19 23:46:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:42,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:42,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:46:42,433 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:46:42,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:46:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:46:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 23:46:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:46:42,649 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:46:42,651 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:46:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:46:43,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:46:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:46:43,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:46:43,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933255025] [2022-03-19 23:46:43,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:46:43,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394774584] [2022-03-19 23:46:43,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394774584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:46:43,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:46:43,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-03-19 23:46:43,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544646094] [2022-03-19 23:46:43,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:46:43,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 23:46:43,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:46:43,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 23:46:43,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:46:43,412 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 23:46:45,632 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:46:49,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:46:51,707 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:46:53,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:46:53,868 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2022-03-19 23:46:53,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 23:46:53,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-03-19 23:46:53,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:46:53,869 INFO L225 Difference]: With dead ends: 96 [2022-03-19 23:46:53,869 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 23:46:53,870 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=117, Invalid=433, Unknown=2, NotChecked=0, Total=552 [2022-03-19 23:46:53,871 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:46:53,871 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 183 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 181 Invalid, 3 Unknown, 0 Unchecked, 6.1s Time] [2022-03-19 23:46:53,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 23:46:53,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-03-19 23:46:53,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 23:46:53,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2022-03-19 23:46:53,896 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39 [2022-03-19 23:46:53,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:46:53,896 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2022-03-19 23:46:53,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 23:46:53,896 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2022-03-19 23:46:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 23:46:53,898 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:46:53,898 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:46:53,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 23:46:54,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:54,123 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:46:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:46:54,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1425187914, now seen corresponding path program 1 times [2022-03-19 23:46:54,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:46:54,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026006909] [2022-03-19 23:46:54,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:54,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:46:54,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:46:54,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842094252] [2022-03-19 23:46:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:54,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:54,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:46:54,140 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:46:54,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:46:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:46:54,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 23:46:54,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:46:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:46:54,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:46:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 23:46:54,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:46:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026006909] [2022-03-19 23:46:54,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:46:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842094252] [2022-03-19 23:46:54,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842094252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:46:54,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:46:54,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 23:46:54,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111185210] [2022-03-19 23:46:54,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:46:54,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 23:46:54,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:46:54,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 23:46:54,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:46:54,571 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 23:46:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:46:54,723 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2022-03-19 23:46:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 23:46:54,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 39 [2022-03-19 23:46:54,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:46:54,726 INFO L225 Difference]: With dead ends: 97 [2022-03-19 23:46:54,727 INFO L226 Difference]: Without dead ends: 91 [2022-03-19 23:46:54,727 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:46:54,728 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:46:54,728 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:46:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-19 23:46:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-03-19 23:46:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 23:46:54,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-03-19 23:46:54,750 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 39 [2022-03-19 23:46:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:46:54,750 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-03-19 23:46:54,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 23:46:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-03-19 23:46:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 23:46:54,758 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:46:54,758 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:46:54,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:46:54,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:54,971 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:46:54,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:46:54,972 INFO L85 PathProgramCache]: Analyzing trace with hash 736401910, now seen corresponding path program 2 times [2022-03-19 23:46:54,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:46:54,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990741009] [2022-03-19 23:46:54,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:54,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:46:54,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:46:54,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139534824] [2022-03-19 23:46:54,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:46:54,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:54,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:46:54,988 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:46:54,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:46:55,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:46:55,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:46:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 23:46:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:46:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 23:46:55,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:46:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 23:46:55,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:46:55,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990741009] [2022-03-19 23:46:55,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:46:55,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139534824] [2022-03-19 23:46:55,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139534824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:46:55,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:46:55,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 23:46:55,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863186087] [2022-03-19 23:46:55,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:46:55,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 23:46:55,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:46:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 23:46:55,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-19 23:46:55,456 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 23:46:55,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:46:55,622 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2022-03-19 23:46:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 23:46:55,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2022-03-19 23:46:55,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:46:55,624 INFO L225 Difference]: With dead ends: 108 [2022-03-19 23:46:55,624 INFO L226 Difference]: Without dead ends: 102 [2022-03-19 23:46:55,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-19 23:46:55,625 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:46:55,625 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 159 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:46:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-19 23:46:55,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-03-19 23:46:55,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 23:46:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-03-19 23:46:55,638 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 49 [2022-03-19 23:46:55,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:46:55,638 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-03-19 23:46:55,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 23:46:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-03-19 23:46:55,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 23:46:55,640 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:46:55,640 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:46:55,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 23:46:55,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:55,860 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:46:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:46:55,860 INFO L85 PathProgramCache]: Analyzing trace with hash -248152202, now seen corresponding path program 3 times [2022-03-19 23:46:55,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:46:55,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822475976] [2022-03-19 23:46:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:46:55,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:46:55,868 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:46:55,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747205752] [2022-03-19 23:46:55,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:46:55,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:46:55,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:46:55,870 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:46:55,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:46:56,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-19 23:46:56,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:46:56,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 23:46:56,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:46:56,649 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:46:56,653 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:46:56,655 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 23:47:02,188 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) is different from false