/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-05ce600 [2022-02-23 12:14:59,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 12:14:59,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 12:14:59,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 12:14:59,452 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 [2022-02-23 12:14:59,465 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 12:14:59,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 12:14:59,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-23 12:14:59,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-23 12:14:59,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 12:14:59,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 12:14:59,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 12:14:59,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 12:14:59,467 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 12:14:59,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 12:14:59,467 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 12:14:59,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 12:14:59,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 12:14:59,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 12:14:59,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 12:14:59,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 12:14:59,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 12:14:59,468 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 12:14:59,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 12:14:59,468 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 12:14:59,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 12:14:59,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 12:14:59,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 12:14:59,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 12:14:59,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 12:14:59,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 12:14:59,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 12:14:59,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 12:14:59,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 12:14:59,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 12:14:59,469 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-23 12:14:59,469 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-23 12:14:59,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 12:14:59,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 12:14:59,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 12:14:59,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 12:14:59,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 12:14:59,655 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 12:14:59,657 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 12:14:59,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-02-23 12:14:59,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/260081297/f0eb4ffd7c1b4fc2bc8137706157aec5/FLAG48981a87b [2022-02-23 12:15:00,065 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 12:15:00,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-02-23 12:15:00,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/260081297/f0eb4ffd7c1b4fc2bc8137706157aec5/FLAG48981a87b [2022-02-23 12:15:00,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/260081297/f0eb4ffd7c1b4fc2bc8137706157aec5 [2022-02-23 12:15:00,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 12:15:00,480 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-23 12:15:00,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 12:15:00,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 12:15:00,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 12:15:00,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 12:15:00" (1/1) ... [2022-02-23 12:15:00,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35c8df05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:15:00, skipping insertion in model container [2022-02-23 12:15:00,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 12:15:00" (1/1) ... [2022-02-23 12:15:00,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 12:15:00,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 12:15:00,659 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] [2022-02-23 12:15:00,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 12:15:00,688 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 12:15:00,700 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] [2022-02-23 12:15:00,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 12:15:00,730 INFO L208 MainTranslator]: Completed translation [2022-02-23 12:15:00,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:15:00 WrapperNode [2022-02-23 12:15:00,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 12:15:00,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 12:15:00,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 12:15:00,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 12:15:00,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:15:00" (1/1) ... [2022-02-23 12:15:00,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:15:00" (1/1) ... [2022-02-23 12:15:00,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:15:00" (1/1) ... [2022-02-23 12:15:00,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:15:00" (1/1) ... [2022-02-23 12:15:00,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:15:00" (1/1) ... [2022-02-23 12:15:00,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:15:00" (1/1) ... [2022-02-23 12:15:00,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:15:00" (1/1) ... [2022-02-23 12:15:00,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 12:15:00,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 12:15:00,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 12:15:00,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 12:15:00,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:15:00" (1/1) ... [2022-02-23 12:15:00,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 12:15:00,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:15:00,787 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) [2022-02-23 12:15:00,812 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 [2022-02-23 12:15:00,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 12:15:00,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 12:15:00,828 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 12:15:00,828 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 12:15:00,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 12:15:00,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 12:15:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 12:15:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 12:15:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 12:15:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 12:15:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 12:15:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 12:15:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 12:15:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 12:15:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 12:15:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 12:15:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 12:15:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 12:15:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 12:15:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 12:15:00,886 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 12:15:00,887 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 12:15:01,051 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 12:15:01,076 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 12:15:01,077 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 12:15:01,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 12:15:01 BoogieIcfgContainer [2022-02-23 12:15:01,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 12:15:01,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 12:15:01,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 12:15:01,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 12:15:01,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 12:15:00" (1/3) ... [2022-02-23 12:15:01,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7540c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 12:15:01, skipping insertion in model container [2022-02-23 12:15:01,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:15:00" (2/3) ... [2022-02-23 12:15:01,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7540c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 12:15:01, skipping insertion in model container [2022-02-23 12:15:01,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 12:15:01" (3/3) ... [2022-02-23 12:15:01,084 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.c [2022-02-23 12:15:01,088 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 12:15:01,088 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 12:15:01,119 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 12:15:01,123 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 12:15:01,124 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 12:15:01,135 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) [2022-02-23 12:15:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 12:15:01,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:15:01,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:15:01,139 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:15:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:15:01,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2022-02-23 12:15:01,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:15:01,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821218671] [2022-02-23 12:15:01,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:01,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:15:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:15:01,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 12:15:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:15:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 12:15:01,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:15:01,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821218671] [2022-02-23 12:15:01,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821218671] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:15:01,315 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:15:01,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 12:15:01,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114457772] [2022-02-23 12:15:01,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:15:01,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 12:15:01,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:15:01,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 12:15:01,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 12:15:01,348 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) [2022-02-23 12:15:01,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:15:01,391 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-02-23 12:15:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 12:15:01,393 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 [2022-02-23 12:15:01,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:15:01,402 INFO L225 Difference]: With dead ends: 45 [2022-02-23 12:15:01,402 INFO L226 Difference]: Without dead ends: 21 [2022-02-23 12:15:01,405 INFO L932 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 [2022-02-23 12:15:01,411 INFO L933 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 [2022-02-23 12:15:01,412 INFO L934 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] [2022-02-23 12:15:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-23 12:15:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-02-23 12:15:01,435 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) [2022-02-23 12:15:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-23 12:15:01,436 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-02-23 12:15:01,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:15:01,437 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-23 12:15:01,437 INFO L471 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) [2022-02-23 12:15:01,437 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-23 12:15:01,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 12:15:01,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:15:01,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:15:01,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 12:15:01,438 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:15:01,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:15:01,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2022-02-23 12:15:01,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:15:01,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822001688] [2022-02-23 12:15:01,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:01,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:15:01,457 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:15:01,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031683752] [2022-02-23 12:15:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:01,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:01,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:15:01,470 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) [2022-02-23 12:15:01,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 12:15:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:15:01,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 12:15:01,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:15:01,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 12:15:01,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 12:15:01,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:15:01,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822001688] [2022-02-23 12:15:01,684 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:15:01,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031683752] [2022-02-23 12:15:01,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031683752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:15:01,685 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:15:01,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 12:15:01,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548302324] [2022-02-23 12:15:01,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:15:01,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 12:15:01,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:15:01,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 12:15:01,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 12:15:01,689 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) [2022-02-23 12:15:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:15:01,802 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-02-23 12:15:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 12:15:01,803 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 [2022-02-23 12:15:01,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:15:01,804 INFO L225 Difference]: With dead ends: 34 [2022-02-23 12:15:01,804 INFO L226 Difference]: Without dead ends: 29 [2022-02-23 12:15:01,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 12:15:01,806 INFO L933 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:15:01,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:15:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-23 12:15:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-02-23 12:15:01,811 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) [2022-02-23 12:15:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-02-23 12:15:01,812 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-02-23 12:15:01,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:15:01,823 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-02-23 12:15:01,824 INFO L471 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) [2022-02-23 12:15:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-02-23 12:15:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 12:15:01,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:15:01,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:15:01,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 12:15:02,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:02,041 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:15:02,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:15:02,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 1 times [2022-02-23 12:15:02,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:15:02,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901887940] [2022-02-23 12:15:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:02,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:15:02,065 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:15:02,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932937392] [2022-02-23 12:15:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:02,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:02,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:15:02,072 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) [2022-02-23 12:15:02,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 12:15:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:15:02,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 12:15:02,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:15:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 12:15:02,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:15:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 12:15:02,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:15:02,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901887940] [2022-02-23 12:15:02,426 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:15:02,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932937392] [2022-02-23 12:15:02,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932937392] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:15:02,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:15:02,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-02-23 12:15:02,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025453730] [2022-02-23 12:15:02,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:15:02,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 12:15:02,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:15:02,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 12:15:02,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 12:15:02,429 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) [2022-02-23 12:15:02,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:15:02,652 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-02-23 12:15:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 12:15:02,653 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 [2022-02-23 12:15:02,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:15:02,654 INFO L225 Difference]: With dead ends: 45 [2022-02-23 12:15:02,654 INFO L226 Difference]: Without dead ends: 38 [2022-02-23 12:15:02,654 INFO L932 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 [2022-02-23 12:15:02,655 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-23 12:15:02,655 INFO L934 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] [2022-02-23 12:15:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-23 12:15:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-02-23 12:15:02,661 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) [2022-02-23 12:15:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-02-23 12:15:02,661 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-02-23 12:15:02,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:15:02,662 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-02-23 12:15:02,662 INFO L471 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) [2022-02-23 12:15:02,662 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-02-23 12:15:02,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 12:15:02,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:15:02,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:15:02,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 12:15:02,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 12:15:02,876 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:15:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:15:02,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 1 times [2022-02-23 12:15:02,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:15:02,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570703159] [2022-02-23 12:15:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:02,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:15:02,887 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:15:02,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071721242] [2022-02-23 12:15:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:02,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:02,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:15:02,889 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) [2022-02-23 12:15:02,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 12:15:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:15:02,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 12:15:02,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:15:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 12:15:02,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:15:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 12:15:03,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:15:03,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570703159] [2022-02-23 12:15:03,039 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:15:03,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071721242] [2022-02-23 12:15:03,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071721242] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:15:03,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:15:03,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 12:15:03,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995022518] [2022-02-23 12:15:03,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:15:03,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 12:15:03,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:15:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 12:15:03,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 12:15:03,041 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) [2022-02-23 12:15:03,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:15:03,096 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-02-23 12:15:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 12:15:03,096 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 [2022-02-23 12:15:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:15:03,097 INFO L225 Difference]: With dead ends: 77 [2022-02-23 12:15:03,097 INFO L226 Difference]: Without dead ends: 71 [2022-02-23 12:15:03,097 INFO L932 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 [2022-02-23 12:15:03,098 INFO L933 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 [2022-02-23 12:15:03,098 INFO L934 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] [2022-02-23 12:15:03,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-23 12:15:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-02-23 12:15:03,104 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) [2022-02-23 12:15:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-02-23 12:15:03,105 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-02-23 12:15:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:15:03,106 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-02-23 12:15:03,106 INFO L471 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) [2022-02-23 12:15:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-02-23 12:15:03,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 12:15:03,106 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:15:03,106 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:15:03,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 12:15:03,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:03,324 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:15:03,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:15:03,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1132431350, now seen corresponding path program 1 times [2022-02-23 12:15:03,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:15:03,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13649879] [2022-02-23 12:15:03,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:03,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:15:03,332 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:15:03,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598843506] [2022-02-23 12:15:03,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:03,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:03,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:15:03,334 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) [2022-02-23 12:15:03,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 12:15:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:15:03,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-23 12:15:03,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:15:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 12:15:03,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:15:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 12:15:04,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:15:04,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13649879] [2022-02-23 12:15:04,019 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:15:04,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598843506] [2022-02-23 12:15:04,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598843506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:15:04,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:15:04,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-02-23 12:15:04,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281947709] [2022-02-23 12:15:04,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:15:04,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-23 12:15:04,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:15:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-23 12:15:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-23 12:15:04,021 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) [2022-02-23 12:15:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:15:04,475 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-02-23 12:15:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-23 12:15:04,476 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 [2022-02-23 12:15:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:15:04,476 INFO L225 Difference]: With dead ends: 85 [2022-02-23 12:15:04,477 INFO L226 Difference]: Without dead ends: 77 [2022-02-23 12:15:04,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-02-23 12:15:04,478 INFO L933 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 [2022-02-23 12:15:04,478 INFO L934 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] [2022-02-23 12:15:04,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-23 12:15:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-02-23 12:15:04,487 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) [2022-02-23 12:15:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-02-23 12:15:04,488 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29 [2022-02-23 12:15:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:15:04,488 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-02-23 12:15:04,488 INFO L471 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) [2022-02-23 12:15:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-02-23 12:15:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 12:15:04,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:15:04,489 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:15:04,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-23 12:15:04,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:04,695 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:15:04,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:15:04,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1565736524, now seen corresponding path program 1 times [2022-02-23 12:15:04,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:15:04,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211541663] [2022-02-23 12:15:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:04,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:15:04,703 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:15:04,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837881941] [2022-02-23 12:15:04,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:04,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:04,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:15:04,704 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) [2022-02-23 12:15:04,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 12:15:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:15:04,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-23 12:15:04,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:15:04,894 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 12:15:04,896 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 12:15:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-23 12:15:05,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:15:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-23 12:15:05,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:15:05,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211541663] [2022-02-23 12:15:05,557 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:15:05,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837881941] [2022-02-23 12:15:05,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837881941] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:15:05,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:15:05,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-02-23 12:15:05,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695136948] [2022-02-23 12:15:05,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:15:05,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 12:15:05,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:15:05,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 12:15:05,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-23 12:15:05,558 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) [2022-02-23 12:15:07,745 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 [] [2022-02-23 12:15:11,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 12:15:13,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 12:15:15,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:15:15,958 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2022-02-23 12:15:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 12:15:15,958 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 [2022-02-23 12:15:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:15:15,959 INFO L225 Difference]: With dead ends: 96 [2022-02-23 12:15:15,959 INFO L226 Difference]: Without dead ends: 90 [2022-02-23 12:15:15,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=117, Invalid=433, Unknown=2, NotChecked=0, Total=552 [2022-02-23 12:15:15,960 INFO L933 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 [2022-02-23 12:15:15,960 INFO L934 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] [2022-02-23 12:15:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-23 12:15:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-02-23 12:15:15,970 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) [2022-02-23 12:15:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2022-02-23 12:15:15,974 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39 [2022-02-23 12:15:15,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:15:15,975 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2022-02-23 12:15:15,975 INFO L471 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) [2022-02-23 12:15:15,975 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2022-02-23 12:15:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 12:15:15,978 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:15:15,978 INFO L514 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] [2022-02-23 12:15:16,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 12:15:16,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:16,191 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:15:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:15:16,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1425187914, now seen corresponding path program 1 times [2022-02-23 12:15:16,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:15:16,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913130990] [2022-02-23 12:15:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:16,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:15:16,199 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:15:16,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021962538] [2022-02-23 12:15:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:16,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:16,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:15:16,202 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) [2022-02-23 12:15:16,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 12:15:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:15:16,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 12:15:16,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:15:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 12:15:16,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:15:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 12:15:16,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:15:16,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913130990] [2022-02-23 12:15:16,547 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:15:16,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021962538] [2022-02-23 12:15:16,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021962538] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:15:16,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:15:16,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-02-23 12:15:16,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939255868] [2022-02-23 12:15:16,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:15:16,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 12:15:16,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:15:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 12:15:16,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-23 12:15:16,548 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) [2022-02-23 12:15:16,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:15:16,667 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2022-02-23 12:15:16,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 12:15:16,674 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 [2022-02-23 12:15:16,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:15:16,675 INFO L225 Difference]: With dead ends: 97 [2022-02-23 12:15:16,675 INFO L226 Difference]: Without dead ends: 91 [2022-02-23 12:15:16,676 INFO L932 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 [2022-02-23 12:15:16,676 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-02-23 12:15:16,676 INFO L934 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] [2022-02-23 12:15:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-23 12:15:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-02-23 12:15:16,686 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) [2022-02-23 12:15:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-02-23 12:15:16,687 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 39 [2022-02-23 12:15:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:15:16,687 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-02-23 12:15:16,687 INFO L471 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) [2022-02-23 12:15:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-02-23 12:15:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-23 12:15:16,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:15:16,688 INFO L514 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] [2022-02-23 12:15:16,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 12:15:16,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:16,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:15:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:15:16,912 INFO L85 PathProgramCache]: Analyzing trace with hash 736401910, now seen corresponding path program 2 times [2022-02-23 12:15:16,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:15:16,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627797972] [2022-02-23 12:15:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:16,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:15:16,920 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:15:16,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698188687] [2022-02-23 12:15:16,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 12:15:16,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:16,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:15:16,927 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) [2022-02-23 12:15:16,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 12:15:16,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 12:15:16,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 12:15:16,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 12:15:16,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:15:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 12:15:17,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:15:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 12:15:17,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:15:17,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627797972] [2022-02-23 12:15:17,290 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:15:17,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698188687] [2022-02-23 12:15:17,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698188687] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:15:17,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:15:17,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 12:15:17,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039359653] [2022-02-23 12:15:17,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:15:17,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 12:15:17,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:15:17,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 12:15:17,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-23 12:15:17,291 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) [2022-02-23 12:15:17,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:15:17,429 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2022-02-23 12:15:17,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 12:15:17,430 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 [2022-02-23 12:15:17,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:15:17,430 INFO L225 Difference]: With dead ends: 108 [2022-02-23 12:15:17,430 INFO L226 Difference]: Without dead ends: 102 [2022-02-23 12:15:17,431 INFO L932 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 [2022-02-23 12:15:17,431 INFO L933 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 [2022-02-23 12:15:17,431 INFO L934 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] [2022-02-23 12:15:17,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-23 12:15:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-02-23 12:15:17,441 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) [2022-02-23 12:15:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-02-23 12:15:17,442 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 49 [2022-02-23 12:15:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:15:17,442 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-02-23 12:15:17,442 INFO L471 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) [2022-02-23 12:15:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-02-23 12:15:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-23 12:15:17,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:15:17,443 INFO L514 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] [2022-02-23 12:15:17,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 12:15:17,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:17,660 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:15:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:15:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash -248152202, now seen corresponding path program 3 times [2022-02-23 12:15:17,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:15:17,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849769604] [2022-02-23 12:15:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:15:17,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:15:17,667 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:15:17,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181803783] [2022-02-23 12:15:17,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 12:15:17,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:15:17,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:15:17,669 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) [2022-02-23 12:15:17,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 12:15:18,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-23 12:15:18,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 12:15:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 12:15:18,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:15:18,413 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 12:15:18,416 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 12:15:18,417 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 12:15:22,190 WARN L838 $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 [2022-02-23 12:27:57,892 WARN L232 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 18 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)