/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 17:06:17,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 17:06:17,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 17:06:17,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 17:06:17,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 17:06:17,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 17:06:17,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 17:06:17,418 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 [2022-02-14 17:06:17,442 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 17:06:17,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 17:06:17,443 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-14 17:06:17,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-14 17:06:17,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-14 17:06:17,444 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-14 17:06:17,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-14 17:06:17,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-14 17:06:17,444 INFO L138 SettingsManager]: * Use SBE=true [2022-02-14 17:06:17,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 17:06:17,445 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 17:06:17,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 17:06:17,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 17:06:17,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 17:06:17,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 17:06:17,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 17:06:17,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 17:06:17,446 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 17:06:17,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 17:06:17,446 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 17:06:17,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 17:06:17,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 17:06:17,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 17:06:17,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 17:06:17,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 17:06:17,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 17:06:17,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-14 17:06:17,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-14 17:06:17,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 17:06:17,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-14 17:06:17,447 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-14 17:06:17,447 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-14 17:06:17,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-14 17:06:17,447 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 17:06:17,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 17:06:17,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 17:06:17,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 17:06:17,627 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 17:06:17,628 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 17:06:17,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2022-02-14 17:06:17,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/074070652/6448e1bbd3dc4e27ba9999d17862ac1c/FLAG751e35eca [2022-02-14 17:06:18,018 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 17:06:18,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2022-02-14 17:06:18,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/074070652/6448e1bbd3dc4e27ba9999d17862ac1c/FLAG751e35eca [2022-02-14 17:06:18,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/074070652/6448e1bbd3dc4e27ba9999d17862ac1c [2022-02-14 17:06:18,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 17:06:18,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-14 17:06:18,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 17:06:18,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 17:06:18,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 17:06:18,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 05:06:18" (1/1) ... [2022-02-14 17:06:18,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63327e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:06:18, skipping insertion in model container [2022-02-14 17:06:18,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 05:06:18" (1/1) ... [2022-02-14 17:06:18,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 17:06:18,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 17:06:18,590 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_valuebound50.c[597,610] [2022-02-14 17:06:18,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 17:06:18,606 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 17:06:18,614 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_valuebound50.c[597,610] [2022-02-14 17:06:18,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 17:06:18,627 INFO L208 MainTranslator]: Completed translation [2022-02-14 17:06:18,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:06:18 WrapperNode [2022-02-14 17:06:18,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 17:06:18,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 17:06:18,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 17:06:18,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 17:06:18,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:06:18" (1/1) ... [2022-02-14 17:06:18,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:06:18" (1/1) ... [2022-02-14 17:06:18,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:06:18" (1/1) ... [2022-02-14 17:06:18,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:06:18" (1/1) ... [2022-02-14 17:06:18,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:06:18" (1/1) ... [2022-02-14 17:06:18,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:06:18" (1/1) ... [2022-02-14 17:06:18,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:06:18" (1/1) ... [2022-02-14 17:06:18,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 17:06:18,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 17:06:18,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 17:06:18,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 17:06:18,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:06:18" (1/1) ... [2022-02-14 17:06:18,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 17:06:18,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:06:18,680 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) [2022-02-14 17:06:18,685 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 [2022-02-14 17:06:18,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 17:06:18,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 17:06:18,707 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 17:06:18,707 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 17:06:18,707 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 17:06:18,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 17:06:18,707 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 17:06:18,707 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 17:06:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 17:06:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 17:06:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 17:06:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 17:06:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 17:06:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 17:06:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 17:06:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 17:06:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 17:06:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 17:06:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 17:06:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 17:06:18,749 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 17:06:18,751 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 17:06:18,891 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 17:06:18,895 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 17:06:18,895 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 17:06:18,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 05:06:18 BoogieIcfgContainer [2022-02-14 17:06:18,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 17:06:18,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 17:06:18,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 17:06:18,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 17:06:18,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 05:06:18" (1/3) ... [2022-02-14 17:06:18,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5262bb0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 05:06:18, skipping insertion in model container [2022-02-14 17:06:18,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 05:06:18" (2/3) ... [2022-02-14 17:06:18,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5262bb0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 05:06:18, skipping insertion in model container [2022-02-14 17:06:18,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 05:06:18" (3/3) ... [2022-02-14 17:06:18,906 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound50.c [2022-02-14 17:06:18,909 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-14 17:06:18,910 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 17:06:18,940 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 17:06:18,944 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 [2022-02-14 17:06:18,945 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 17:06:18,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 17:06:18,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 17:06:18,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:06:18,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:06:18,963 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:06:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:06:18,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 1 times [2022-02-14 17:06:18,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:06:18,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579374527] [2022-02-14 17:06:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:06:18,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:06:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:06:19,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 17:06:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:06:19,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 17:06:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:06:19,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 17:06:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:06:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 17:06:19,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:06:19,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579374527] [2022-02-14 17:06:19,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579374527] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 17:06:19,130 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 17:06:19,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 17:06:19,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020366875] [2022-02-14 17:06:19,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 17:06:19,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 17:06:19,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:06:19,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 17:06:19,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 17:06:19,158 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 17:06:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:06:19,198 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-02-14 17:06:19,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 17:06:19,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-14 17:06:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:06:19,205 INFO L225 Difference]: With dead ends: 57 [2022-02-14 17:06:19,205 INFO L226 Difference]: Without dead ends: 27 [2022-02-14 17:06:19,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 17:06:19,210 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 17:06:19,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 17:06:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-14 17:06:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-14 17:06:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 17:06:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-02-14 17:06:19,244 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-02-14 17:06:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:06:19,245 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-02-14 17:06:19,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 17:06:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-02-14 17:06:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 17:06:19,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:06:19,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:06:19,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 17:06:19,249 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:06:19,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:06:19,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 1 times [2022-02-14 17:06:19,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:06:19,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118294003] [2022-02-14 17:06:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:06:19,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:06:19,279 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:06:19,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683161663] [2022-02-14 17:06:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:06:19,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:06:19,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:06:19,286 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) [2022-02-14 17:06:19,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 17:06:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:06:19,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 17:06:19,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:06:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 17:06:19,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 17:06:19,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:06:19,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118294003] [2022-02-14 17:06:19,484 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 17:06:19,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683161663] [2022-02-14 17:06:19,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683161663] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 17:06:19,488 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 17:06:19,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 17:06:19,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157392252] [2022-02-14 17:06:19,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 17:06:19,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 17:06:19,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:06:19,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 17:06:19,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 17:06:19,491 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 17:06:19,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:06:19,549 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-02-14 17:06:19,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 17:06:19,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-02-14 17:06:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:06:19,551 INFO L225 Difference]: With dead ends: 39 [2022-02-14 17:06:19,551 INFO L226 Difference]: Without dead ends: 35 [2022-02-14 17:06:19,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-14 17:06:19,552 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 17:06:19,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 17:06:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-14 17:06:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-02-14 17:06:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-14 17:06:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-02-14 17:06:19,559 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-02-14 17:06:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:06:19,560 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-02-14 17:06:19,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 17:06:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-02-14 17:06:19,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-14 17:06:19,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:06:19,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:06:19,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 17:06:19,775 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 [2022-02-14 17:06:19,776 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:06:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:06:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 1 times [2022-02-14 17:06:19,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:06:19,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601756033] [2022-02-14 17:06:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:06:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:06:19,787 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:06:19,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122336284] [2022-02-14 17:06:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:06:19,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:06:19,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:06:19,789 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) [2022-02-14 17:06:19,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 17:06:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:06:19,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-14 17:06:19,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:06:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 17:06:20,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 17:06:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-14 17:06:20,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:06:20,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601756033] [2022-02-14 17:06:20,151 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 17:06:20,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122336284] [2022-02-14 17:06:20,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122336284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 17:06:20,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 17:06:20,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-02-14 17:06:20,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751459933] [2022-02-14 17:06:20,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 17:06:20,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 17:06:20,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:06:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 17:06:20,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-14 17:06:20,154 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 17:06:20,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:06:20,381 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-02-14 17:06:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 17:06:20,381 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2022-02-14 17:06:20,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:06:20,382 INFO L225 Difference]: With dead ends: 48 [2022-02-14 17:06:20,382 INFO L226 Difference]: Without dead ends: 42 [2022-02-14 17:06:20,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-14 17:06:20,383 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 17:06:20,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 157 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 17:06:20,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-14 17:06:20,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-02-14 17:06:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 17:06:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-02-14 17:06:20,389 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2022-02-14 17:06:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:06:20,389 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-02-14 17:06:20,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 17:06:20,389 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-02-14 17:06:20,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-14 17:06:20,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:06:20,390 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:06:20,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-14 17:06:20,603 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 [2022-02-14 17:06:20,604 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:06:20,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:06:20,604 INFO L85 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 1 times [2022-02-14 17:06:20,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:06:20,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599248505] [2022-02-14 17:06:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:06:20,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:06:20,614 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:06:20,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855701106] [2022-02-14 17:06:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:06:20,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:06:20,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:06:20,616 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) [2022-02-14 17:06:20,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 17:06:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:06:20,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 17:06:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:06:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-14 17:06:20,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 17:06:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-14 17:06:21,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:06:21,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599248505] [2022-02-14 17:06:21,341 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 17:06:21,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855701106] [2022-02-14 17:06:21,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855701106] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 17:06:21,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 17:06:21,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-02-14 17:06:21,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967328035] [2022-02-14 17:06:21,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 17:06:21,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-14 17:06:21,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:06:21,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-14 17:06:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-14 17:06:21,343 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-14 17:06:21,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:06:21,874 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-02-14 17:06:21,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-14 17:06:21,874 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 39 [2022-02-14 17:06:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:06:21,875 INFO L225 Difference]: With dead ends: 60 [2022-02-14 17:06:21,875 INFO L226 Difference]: Without dead ends: 52 [2022-02-14 17:06:21,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-02-14 17:06:21,876 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 17:06:21,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 280 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 276 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-02-14 17:06:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-14 17:06:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2022-02-14 17:06:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 17:06:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-02-14 17:06:21,883 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 39 [2022-02-14 17:06:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:06:21,883 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-02-14 17:06:21,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-14 17:06:21,883 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-02-14 17:06:21,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-14 17:06:21,884 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:06:21,884 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:06:21,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 17:06:22,099 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 [2022-02-14 17:06:22,100 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:06:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:06:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1662296326, now seen corresponding path program 1 times [2022-02-14 17:06:22,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:06:22,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739577647] [2022-02-14 17:06:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:06:22,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:06:22,110 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:06:22,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519855302] [2022-02-14 17:06:22,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:06:22,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:06:22,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:06:22,112 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) [2022-02-14 17:06:22,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 17:06:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:06:22,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-14 17:06:22,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:06:22,254 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 17:06:22,256 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 17:06:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-02-14 17:06:23,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 17:06:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-02-14 17:06:23,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:06:23,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739577647] [2022-02-14 17:06:23,945 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 17:06:23,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519855302] [2022-02-14 17:06:23,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519855302] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 17:06:23,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 17:06:23,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-02-14 17:06:23,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378497475] [2022-02-14 17:06:23,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 17:06:23,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 17:06:23,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:06:23,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 17:06:23,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-14 17:06:23,947 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-14 17:06:25,983 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 [] [2022-02-14 17:06:30,038 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 17:06:32,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 17:06:34,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 17:06:36,095 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 17:06:38,108 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 [] [2022-02-14 17:06:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:06:40,355 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-02-14 17:06:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 17:06:40,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2022-02-14 17:06:40,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:06:40,356 INFO L225 Difference]: With dead ends: 56 [2022-02-14 17:06:40,357 INFO L226 Difference]: Without dead ends: 50 [2022-02-14 17:06:40,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=66, Invalid=238, Unknown=2, NotChecked=0, Total=306 [2022-02-14 17:06:40,357 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 19 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-02-14 17:06:40,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 140 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 105 Invalid, 6 Unknown, 0 Unchecked, 12.2s Time] [2022-02-14 17:06:40,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-14 17:06:40,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-02-14 17:06:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 17:06:40,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-02-14 17:06:40,364 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 48 [2022-02-14 17:06:40,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:06:40,364 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-02-14 17:06:40,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-14 17:06:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-02-14 17:06:40,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-14 17:06:40,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:06:40,365 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:06:40,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 17:06:40,582 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 [2022-02-14 17:06:40,583 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:06:40,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:06:40,583 INFO L85 PathProgramCache]: Analyzing trace with hash -143142008, now seen corresponding path program 1 times [2022-02-14 17:06:40,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:06:40,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9702393] [2022-02-14 17:06:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:06:40,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:06:40,593 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:06:40,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843130996] [2022-02-14 17:06:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:06:40,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:06:40,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:06:40,599 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) [2022-02-14 17:06:40,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 17:06:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 17:06:40,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 17:06:40,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:06:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 17:06:40,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 17:06:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 17:06:40,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:06:40,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9702393] [2022-02-14 17:06:40,957 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 17:06:40,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843130996] [2022-02-14 17:06:40,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843130996] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 17:06:40,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 17:06:40,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-02-14 17:06:40,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982200504] [2022-02-14 17:06:40,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 17:06:40,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 17:06:40,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:06:40,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 17:06:40,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-14 17:06:40,959 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-02-14 17:06:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:06:41,094 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-02-14 17:06:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 17:06:41,094 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2022-02-14 17:06:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:06:41,095 INFO L225 Difference]: With dead ends: 65 [2022-02-14 17:06:41,095 INFO L226 Difference]: Without dead ends: 59 [2022-02-14 17:06:41,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-14 17:06:41,096 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 17:06:41,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 191 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 17:06:41,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-14 17:06:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-02-14 17:06:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 17:06:41,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-02-14 17:06:41,103 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2022-02-14 17:06:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:06:41,105 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-02-14 17:06:41,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-02-14 17:06:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-02-14 17:06:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-14 17:06:41,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:06:41,111 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:06:41,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 17:06:41,315 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 [2022-02-14 17:06:41,315 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:06:41,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:06:41,316 INFO L85 PathProgramCache]: Analyzing trace with hash 55892592, now seen corresponding path program 2 times [2022-02-14 17:06:41,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:06:41,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002257400] [2022-02-14 17:06:41,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:06:41,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:06:41,323 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:06:41,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192228379] [2022-02-14 17:06:41,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 17:06:41,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:06:41,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:06:41,328 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) [2022-02-14 17:06:41,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 17:06:41,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 17:06:41,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 17:06:41,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 17:06:41,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:06:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-14 17:06:41,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 17:06:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-14 17:06:41,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:06:41,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002257400] [2022-02-14 17:06:41,730 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 17:06:41,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192228379] [2022-02-14 17:06:41,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192228379] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 17:06:41,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 17:06:41,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-14 17:06:41,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380496753] [2022-02-14 17:06:41,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 17:06:41,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 17:06:41,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:06:41,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 17:06:41,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-14 17:06:41,734 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-02-14 17:06:41,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:06:41,918 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2022-02-14 17:06:41,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 17:06:41,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 57 [2022-02-14 17:06:41,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:06:41,920 INFO L225 Difference]: With dead ends: 78 [2022-02-14 17:06:41,920 INFO L226 Difference]: Without dead ends: 72 [2022-02-14 17:06:41,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-14 17:06:41,921 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 17:06:41,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 287 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 17:06:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-14 17:06:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2022-02-14 17:06:41,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 17:06:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-02-14 17:06:41,934 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 57 [2022-02-14 17:06:41,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:06:41,935 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-02-14 17:06:41,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-02-14 17:06:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-02-14 17:06:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-14 17:06:41,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 17:06:41,937 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 17:06:41,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 17:06:42,153 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 [2022-02-14 17:06:42,154 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 17:06:42,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 17:06:42,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2136090540, now seen corresponding path program 3 times [2022-02-14 17:06:42,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 17:06:42,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226382018] [2022-02-14 17:06:42,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 17:06:42,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 17:06:42,161 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 17:06:42,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553293478] [2022-02-14 17:06:42,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 17:06:42,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 17:06:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 17:06:42,165 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) [2022-02-14 17:06:42,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 17:06:42,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-14 17:06:42,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 17:06:42,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-14 17:06:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 17:06:43,463 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 17:06:43,466 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 17:06:43,468 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 17:07:05,013 WARN L228 SmtUtils]: Spent 8.92s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 17:07:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-02-14 17:07:12,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 17:07:20,464 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 17:07:24,670 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 17:07:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-02-14 17:07:49,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 17:07:49,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226382018] [2022-02-14 17:07:49,067 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 17:07:49,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553293478] [2022-02-14 17:07:49,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553293478] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 17:07:49,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 17:07:49,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-02-14 17:07:49,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047657520] [2022-02-14 17:07:49,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 17:07:49,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-14 17:07:49,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 17:07:49,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-14 17:07:49,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=493, Unknown=9, NotChecked=0, Total=600 [2022-02-14 17:07:49,069 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-14 17:08:00,864 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse7 (* 2 c_main_~Y~0))) (and (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))) (<= 0 c_main_~X~0) (<= c_main_~X~0 50) (< c_main_~v~0 .cse7) (<= c_main_~Y~0 50) (= (+ (* 2 (* c_main_~x~0 c_main_~y~0)) c_main_~v~0 c_main_~X~0) (+ (* 2 (* c_main_~Y~0 c_main_~x~0)) (* 2 c_main_~y~0) .cse7)) (<= 0 c_main_~Y~0))) is different from false [2022-02-14 17:08:01,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 17:08:01,013 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-02-14 17:08:01,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-14 17:08:01,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 57 [2022-02-14 17:08:01,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 17:08:01,014 INFO L225 Difference]: With dead ends: 62 [2022-02-14 17:08:01,014 INFO L226 Difference]: Without dead ends: 0 [2022-02-14 17:08:01,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 63.7s TimeCoverageRelationStatistics Valid=228, Invalid=1026, Unknown=10, NotChecked=68, Total=1332 [2022-02-14 17:08:01,016 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-14 17:08:01,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 217 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 244 Invalid, 0 Unknown, 42 Unchecked, 1.2s Time] [2022-02-14 17:08:01,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-14 17:08:01,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-14 17:08:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-14 17:08:01,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-14 17:08:01,017 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2022-02-14 17:08:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 17:08:01,017 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-14 17:08:01,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-14 17:08:01,017 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-14 17:08:01,017 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-14 17:08:01,019 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 17:08:01,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 17:08:01,224 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 [2022-02-14 17:08:01,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-14 17:08:27,467 WARN L228 SmtUtils]: Spent 26.20s on a formula simplification. DAG size of input: 114 DAG size of output: 38 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-14 17:08:45,880 WARN L228 SmtUtils]: Spent 18.37s on a formula simplification. DAG size of input: 134 DAG size of output: 45 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-14 17:08:46,260 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2022-02-14 17:08:46,260 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2022-02-14 17:08:46,260 INFO L858 garLoopResultBuilder]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2022-02-14 17:08:46,260 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2022-02-14 17:08:46,260 INFO L858 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2022-02-14 17:08:46,260 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2022-02-14 17:08:46,260 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2022-02-14 17:08:46,260 INFO L854 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~X~0) (<= main_~X~0 50)) [2022-02-14 17:08:46,260 INFO L858 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2022-02-14 17:08:46,261 INFO L861 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-02-14 17:08:46,261 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 21 53) no Hoare annotation was computed. [2022-02-14 17:08:46,261 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-02-14 17:08:46,261 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse2 (* main_~y~0 2)) (.cse0 (* main_~Y~0 2)) (.cse1 (* 2 (* main_~Y~0 main_~x~0)))) (and (= (+ .cse0 .cse1) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (= (+ .cse2 .cse0 (* 2 main_~yx~0)) (+ (* 2 main_~xy~0) main_~X~0 main_~v~0)) (= (+ (* 2 (* main_~y~0 main_~x~0)) main_~X~0 main_~v~0) (+ .cse2 .cse0 .cse1)))) [2022-02-14 17:08:46,261 INFO L858 garLoopResultBuilder]: For program point L50-1(line 50) no Hoare annotation was computed. [2022-02-14 17:08:46,261 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 21 53) no Hoare annotation was computed. [2022-02-14 17:08:46,261 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 45) no Hoare annotation was computed. [2022-02-14 17:08:46,261 INFO L858 garLoopResultBuilder]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2022-02-14 17:08:46,261 INFO L854 garLoopResultBuilder]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 main_~X~0))) (and (or .cse0 (forall ((main_~y~0 Int)) (= (+ (* 2 (* main_~y~0 main_~x~0)) main_~X~0 main_~v~0) (+ (* main_~y~0 2) (* main_~Y~0 2) (* 2 (* main_~Y~0 main_~x~0))))) (not (= main_~X~0 0))) (or .cse0 (forall ((main_~Y~0 Int)) (= (* 2 (* main_~y~0 main_~x~0)) (+ (* (* main_~X~0 main_~y~0) 2) (* main_~y~0 2))))) (= (+ (* main_~Y~0 2) (* 2 (* main_~Y~0 main_~x~0))) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (<= main_~Y~0 50) (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= main_~X~0 50))) [2022-02-14 17:08:46,261 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 21 53) the Hoare annotation is: true [2022-02-14 17:08:46,261 INFO L858 garLoopResultBuilder]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2022-02-14 17:08:46,261 INFO L854 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (* main_~Y~0 2)) (.cse0 (* 2 main_~xy~0)) (.cse4 (* 2 (* main_~Y~0 main_~x~0))) (.cse2 (* 2 main_~yx~0)) (.cse3 (<= main_~x~0 main_~X~0))) (and (= (+ .cse0 main_~X~0 main_~v~0) (+ .cse1 .cse2)) (or .cse3 (forall ((main_~y~0 Int)) (= (+ (* 2 (* main_~y~0 main_~x~0)) main_~X~0 main_~v~0) (+ (* main_~y~0 2) (* main_~Y~0 2) (* 2 (* main_~Y~0 main_~x~0))))) (not (= main_~X~0 0))) (= (+ .cse1 .cse4) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (<= main_~Y~0 50) (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= main_~X~0 50) (or (= (+ .cse0 (* main_~y~0 2) .cse4) (+ (* 2 (* main_~y~0 main_~x~0)) .cse2)) .cse3))) [2022-02-14 17:08:46,261 INFO L858 garLoopResultBuilder]: For program point L35-1(lines 32 47) no Hoare annotation was computed. [2022-02-14 17:08:46,261 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-02-14 17:08:46,262 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-14 17:08:46,262 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-02-14 17:08:46,262 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-02-14 17:08:46,262 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-14 17:08:46,262 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-14 17:08:46,262 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-02-14 17:08:46,262 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 16) no Hoare annotation was computed. [2022-02-14 17:08:46,262 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2022-02-14 17:08:46,262 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 17) no Hoare annotation was computed. [2022-02-14 17:08:46,262 INFO L858 garLoopResultBuilder]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2022-02-14 17:08:46,262 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2022-02-14 17:08:46,262 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2022-02-14 17:08:46,264 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-02-14 17:08:46,265 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 17:08:46,270 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-02-14 17:08:46,271 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-02-14 17:08:46,275 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-02-14 17:08:46,275 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-02-14 17:08:46,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 05:08:46 BoogieIcfgContainer [2022-02-14 17:08:46,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 17:08:46,277 INFO L158 Benchmark]: Toolchain (without parser) took 147830.85ms. Allocated memory was 180.4MB in the beginning and 246.4MB in the end (delta: 66.1MB). Free memory was 124.3MB in the beginning and 133.3MB in the end (delta: -9.0MB). Peak memory consumption was 58.1MB. Max. memory is 8.0GB. [2022-02-14 17:08:46,277 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 180.4MB. Free memory is still 141.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 17:08:46,277 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.55ms. Allocated memory was 180.4MB in the beginning and 246.4MB in the end (delta: 66.1MB). Free memory was 124.1MB in the beginning and 218.1MB in the end (delta: -94.0MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. [2022-02-14 17:08:46,278 INFO L158 Benchmark]: Boogie Preprocessor took 18.26ms. Allocated memory is still 246.4MB. Free memory was 218.1MB in the beginning and 216.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 17:08:46,278 INFO L158 Benchmark]: RCFGBuilder took 249.51ms. Allocated memory is still 246.4MB. Free memory was 216.7MB in the beginning and 205.5MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-14 17:08:46,278 INFO L158 Benchmark]: TraceAbstraction took 147379.07ms. Allocated memory is still 246.4MB. Free memory was 205.1MB in the beginning and 133.3MB in the end (delta: 71.8MB). Peak memory consumption was 71.6MB. Max. memory is 8.0GB. [2022-02-14 17:08:46,279 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 180.4MB. Free memory is still 141.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 180.55ms. Allocated memory was 180.4MB in the beginning and 246.4MB in the end (delta: 66.1MB). Free memory was 124.1MB in the beginning and 218.1MB in the end (delta: -94.0MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.26ms. Allocated memory is still 246.4MB. Free memory was 218.1MB in the beginning and 216.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 249.51ms. Allocated memory is still 246.4MB. Free memory was 216.7MB in the beginning and 205.5MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 147379.07ms. Allocated memory is still 246.4MB. Free memory was 205.1MB in the beginning and 133.3MB in the end (delta: 71.8MB). Peak memory consumption was 71.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 147.3s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 29.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 45.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 148 SdHoareTripleChecker+Valid, 14.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 140 mSDsluCounter, 1407 SdHoareTripleChecker+Invalid, 13.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 106 IncrementalHoareTripleChecker+Unchecked, 1215 mSDsCounter, 98 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1168 IncrementalHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 98 mSolverCounterUnsat, 192 mSDtfsCounter, 1168 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 632 GetRequests, 492 SyntacticMatches, 6 SemanticMatches, 134 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 69.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=7, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 43 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 29 PreInvPairs, 50 NumberOfFragments, 259 HoareAnnotationTreeSize, 29 FomulaSimplifications, 792 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 4678 FormulaSimplificationTreeSizeReductionInter, 45.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 70.2s InterpolantComputationTime, 327 NumberOfCodeBlocks, 309 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 594 ConstructedInterpolants, 6 QuantifiedInterpolants, 3393 SizeOfPredicates, 50 NumberOfNonLiveVariables, 854 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 339/426 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant [2022-02-14 17:08:46,284 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-02-14 17:08:46,284 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-02-14 17:08:46,284 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-02-14 17:08:46,284 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] Derived loop invariant: (((((((x <= X || (forall main_~y~0 : int :: 2 * (main_~y~0 * x) + X + v == main_~y~0 * 2 + Y * 2 + 2 * (Y * x))) || !(X == 0)) && (x <= X || (forall main_~Y~0 : int :: 2 * (y * x) == X * y * 2 + y * 2))) && Y * 2 + 2 * (Y * x) == X * y * 2 + X + v) && Y <= 50) && 0 <= Y) && 0 <= X) && X <= 50 RESULT: Ultimate proved your program to be correct! [2022-02-14 17:08:46,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...