/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 13:25:37,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 13:25:37,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 13:25:37,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 13:25:37,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 13:25:37,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 13:25:37,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 13:25:37,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 13:25:37,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 13:25:37,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 13:25:37,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 13:25:37,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-18 13:25:37,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 13:25:37,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 13:25:37,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 13:25:37,750 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-18 13:25:37,776 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 13:25:37,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 13:25:37,777 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 13:25:37,777 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 13:25:37,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 13:25:37,778 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 13:25:37,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 13:25:37,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 13:25:37,779 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 13:25:37,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 13:25:37,780 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 13:25:37,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 13:25:37,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 13:25:37,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 13:25:37,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 13:25:37,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 13:25:37,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 13:25:37,780 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 13:25:37,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 13:25:37,782 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 13:25:37,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 13:25:37,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 13:25:37,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 13:25:37,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 13:25:37,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 13:25:37,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 13:25:37,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 13:25:37,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 13:25:37,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 13:25:37,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 13:25:37,787 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 13:25:37,787 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 13:25:37,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 13:25:37,787 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 13:25:37,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 13:25:37,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 13:25:37,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 13:25:37,981 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 13:25:37,981 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 13:25:37,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-03-18 13:25:38,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f877591f/bd17bb10d9ed477887705c0c25af119b/FLAG73ad6fab5 [2022-03-18 13:25:38,401 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 13:25:38,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-03-18 13:25:38,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f877591f/bd17bb10d9ed477887705c0c25af119b/FLAG73ad6fab5 [2022-03-18 13:25:38,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f877591f/bd17bb10d9ed477887705c0c25af119b [2022-03-18 13:25:38,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 13:25:38,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 13:25:38,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 13:25:38,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 13:25:38,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 13:25:38,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:25:38" (1/1) ... [2022-03-18 13:25:38,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:25:38, skipping insertion in model container [2022-03-18 13:25:38,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:25:38" (1/1) ... [2022-03-18 13:25:38,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 13:25:38,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 13:25:38,956 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] [2022-03-18 13:25:38,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 13:25:38,973 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 13:25:38,981 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] [2022-03-18 13:25:38,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 13:25:38,998 INFO L208 MainTranslator]: Completed translation [2022-03-18 13:25:38,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:25:38 WrapperNode [2022-03-18 13:25:38,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 13:25:39,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 13:25:39,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 13:25:39,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 13:25:39,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:25:38" (1/1) ... [2022-03-18 13:25:39,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:25:38" (1/1) ... [2022-03-18 13:25:39,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:25:38" (1/1) ... [2022-03-18 13:25:39,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:25:38" (1/1) ... [2022-03-18 13:25:39,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:25:38" (1/1) ... [2022-03-18 13:25:39,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:25:38" (1/1) ... [2022-03-18 13:25:39,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:25:38" (1/1) ... [2022-03-18 13:25:39,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 13:25:39,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 13:25:39,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 13:25:39,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 13:25:39,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:25:38" (1/1) ... [2022-03-18 13:25:39,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 13:25:39,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:25:39,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 13:25:39,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 13:25:39,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 13:25:39,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 13:25:39,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 13:25:39,155 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 13:25:39,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 13:25:39,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 13:25:39,156 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 13:25:39,156 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 13:25:39,156 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 13:25:39,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 13:25:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 13:25:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 13:25:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 13:25:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 13:25:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 13:25:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 13:25:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 13:25:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 13:25:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 13:25:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 13:25:39,208 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 13:25:39,209 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 13:25:39,340 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 13:25:39,345 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 13:25:39,345 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 13:25:39,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:25:39 BoogieIcfgContainer [2022-03-18 13:25:39,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 13:25:39,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 13:25:39,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 13:25:39,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 13:25:39,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 01:25:38" (1/3) ... [2022-03-18 13:25:39,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24402c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:25:39, skipping insertion in model container [2022-03-18 13:25:39,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:25:38" (2/3) ... [2022-03-18 13:25:39,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24402c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:25:39, skipping insertion in model container [2022-03-18 13:25:39,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:25:39" (3/3) ... [2022-03-18 13:25:39,364 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.c [2022-03-18 13:25:39,368 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 13:25:39,368 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 13:25:39,398 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 13:25:39,403 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 13:25:39,403 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 13:25:39,414 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 13:25:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 13:25:39,417 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:25:39,418 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:25:39,418 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:25:39,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:25:39,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2022-03-18 13:25:39,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:25:39,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436926349] [2022-03-18 13:25:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:39,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:25:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:25:39,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:25:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:25:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:25:39,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:25:39,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436926349] [2022-03-18 13:25:39,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436926349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:25:39,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:25:39,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 13:25:39,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496455973] [2022-03-18 13:25:39,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:25:39,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 13:25:39,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:25:39,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 13:25:39,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 13:25:39,564 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 13:25:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:25:39,627 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-03-18 13:25:39,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 13:25:39,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 13:25:39,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:25:39,640 INFO L225 Difference]: With dead ends: 45 [2022-03-18 13:25:39,640 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 13:25:39,643 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 13:25:39,646 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:25:39,647 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:25:39,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 13:25:39,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-03-18 13:25:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 13:25:39,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-03-18 13:25:39,678 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-03-18 13:25:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:25:39,679 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-03-18 13:25:39,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 13:25:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-03-18 13:25:39,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 13:25:39,680 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:25:39,680 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:25:39,680 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 13:25:39,681 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:25:39,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:25:39,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2022-03-18 13:25:39,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:25:39,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868293370] [2022-03-18 13:25:39,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:39,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:25:39,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:25:39,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89009780] [2022-03-18 13:25:39,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:39,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:39,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:25:39,732 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:25:39,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 13:25:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:25:39,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 13:25:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:25:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:25:39,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 13:25:39,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:25:39,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868293370] [2022-03-18 13:25:39,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:25:39,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89009780] [2022-03-18 13:25:39,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89009780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:25:39,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:25:39,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 13:25:39,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437327246] [2022-03-18 13:25:39,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:25:39,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 13:25:39,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:25:39,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 13:25:39,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 13:25:39,978 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 13:25:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:25:40,039 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-03-18 13:25:40,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 13:25:40,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 13:25:40,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:25:40,041 INFO L225 Difference]: With dead ends: 34 [2022-03-18 13:25:40,041 INFO L226 Difference]: Without dead ends: 29 [2022-03-18 13:25:40,041 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 13:25:40,042 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:25:40,042 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:25:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-18 13:25:40,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-18 13:25:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 13:25:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-03-18 13:25:40,063 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-03-18 13:25:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:25:40,063 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-03-18 13:25:40,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 13:25:40,063 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-03-18 13:25:40,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 13:25:40,064 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:25:40,064 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:25:40,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 13:25:40,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:40,280 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:25:40,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:25:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 1 times [2022-03-18 13:25:40,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:25:40,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215616259] [2022-03-18 13:25:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:40,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:25:40,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:25:40,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599867955] [2022-03-18 13:25:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:40,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:40,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:25:40,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:25:40,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 13:25:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:25:40,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 13:25:40,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:25:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:25:40,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:25:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 13:25:40,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:25:40,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215616259] [2022-03-18 13:25:40,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:25:40,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599867955] [2022-03-18 13:25:40,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599867955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:25:40,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 13:25:40,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-18 13:25:40,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291932427] [2022-03-18 13:25:40,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 13:25:40,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 13:25:40,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:25:40,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 13:25:40,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 13:25:40,569 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 13:25:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:25:40,814 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-03-18 13:25:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 13:25:40,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2022-03-18 13:25:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:25:40,816 INFO L225 Difference]: With dead ends: 45 [2022-03-18 13:25:40,816 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 13:25:40,817 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-18 13:25:40,817 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:25:40,818 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 110 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 13:25:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 13:25:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-03-18 13:25:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 13:25:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-18 13:25:40,826 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-03-18 13:25:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:25:40,827 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-18 13:25:40,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 13:25:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-18 13:25:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 13:25:40,828 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:25:40,828 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:25:40,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 13:25:41,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 13:25:41,029 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:25:41,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:25:41,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 1 times [2022-03-18 13:25:41,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:25:41,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797230429] [2022-03-18 13:25:41,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:41,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:25:41,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:25:41,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191708813] [2022-03-18 13:25:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:41,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:41,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:25:41,041 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:25:41,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 13:25:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:25:41,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 13:25:41,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:25:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:25:41,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:25:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:25:41,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:25:41,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797230429] [2022-03-18 13:25:41,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:25:41,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191708813] [2022-03-18 13:25:41,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191708813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:25:41,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 13:25:41,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 13:25:41,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195164214] [2022-03-18 13:25:41,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 13:25:41,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 13:25:41,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:25:41,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 13:25:41,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 13:25:41,185 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 13:25:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:25:41,239 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-03-18 13:25:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 13:25:41,239 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-03-18 13:25:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:25:41,240 INFO L225 Difference]: With dead ends: 77 [2022-03-18 13:25:41,240 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 13:25:41,240 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-18 13:25:41,241 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:25:41,241 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:25:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 13:25:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-03-18 13:25:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 13:25:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-03-18 13:25:41,248 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-03-18 13:25:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:25:41,248 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-03-18 13:25:41,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 13:25:41,248 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-03-18 13:25:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 13:25:41,249 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:25:41,249 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:25:41,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 13:25:41,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:41,465 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:25:41,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:25:41,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1132431350, now seen corresponding path program 1 times [2022-03-18 13:25:41,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:25:41,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039962102] [2022-03-18 13:25:41,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:41,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:25:41,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:25:41,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795357614] [2022-03-18 13:25:41,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:41,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:41,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:25:41,474 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:25:41,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 13:25:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:25:41,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 13:25:41,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:25:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 13:25:41,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:25:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 13:25:42,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:25:42,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039962102] [2022-03-18 13:25:42,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:25:42,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795357614] [2022-03-18 13:25:42,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795357614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:25:42,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 13:25:42,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-18 13:25:42,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592327423] [2022-03-18 13:25:42,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 13:25:42,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 13:25:42,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:25:42,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 13:25:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-18 13:25:42,203 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 13:25:42,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:25:42,693 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-03-18 13:25:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 13:25:42,695 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-03-18 13:25:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:25:42,696 INFO L225 Difference]: With dead ends: 85 [2022-03-18 13:25:42,696 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 13:25:42,696 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 13:25:42,697 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:25:42,697 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 167 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 173 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-03-18 13:25:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 13:25:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-03-18 13:25:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 13:25:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-03-18 13:25:42,711 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29 [2022-03-18 13:25:42,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:25:42,711 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-03-18 13:25:42,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 13:25:42,712 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-03-18 13:25:42,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 13:25:42,712 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:25:42,712 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:25:42,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 13:25:42,934 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:42,934 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:25:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:25:42,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1565736524, now seen corresponding path program 1 times [2022-03-18 13:25:42,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:25:42,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742992772] [2022-03-18 13:25:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:42,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:25:42,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:25:42,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523083244] [2022-03-18 13:25:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:42,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:42,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:25:42,943 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:25:42,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 13:25:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:25:42,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 13:25:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:25:43,103 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 13:25:43,105 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 13:25:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 13:25:43,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:25:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 13:25:43,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:25:43,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742992772] [2022-03-18 13:25:43,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:25:43,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523083244] [2022-03-18 13:25:43,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523083244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:25:43,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 13:25:43,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-03-18 13:25:43,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791129339] [2022-03-18 13:25:43,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 13:25:43,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 13:25:43,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:25:43,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 13:25:43,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-18 13:25:43,748 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 13:25:45,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 13:25:49,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 13:25:51,969 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 13:25:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:25:54,223 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2022-03-18 13:25:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 13:25:54,224 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-03-18 13:25:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:25:54,224 INFO L225 Difference]: With dead ends: 96 [2022-03-18 13:25:54,225 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 13:25:54,225 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=117, Invalid=433, Unknown=2, NotChecked=0, Total=552 [2022-03-18 13:25:54,225 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:25:54,226 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 183 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 181 Invalid, 3 Unknown, 0 Unchecked, 6.1s Time] [2022-03-18 13:25:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 13:25:54,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-03-18 13:25:54,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 13:25:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2022-03-18 13:25:54,236 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39 [2022-03-18 13:25:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:25:54,236 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2022-03-18 13:25:54,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 13:25:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2022-03-18 13:25:54,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 13:25:54,237 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:25:54,237 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:25:54,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-18 13:25:54,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:54,452 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:25:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:25:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1425187914, now seen corresponding path program 1 times [2022-03-18 13:25:54,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:25:54,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127557710] [2022-03-18 13:25:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:54,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:25:54,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:25:54,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648302529] [2022-03-18 13:25:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:54,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:54,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:25:54,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:25:54,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 13:25:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:25:54,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 13:25:54,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:25:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:25:54,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:25:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 13:25:54,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:25:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127557710] [2022-03-18 13:25:54,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:25:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648302529] [2022-03-18 13:25:54,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648302529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:25:54,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 13:25:54,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-18 13:25:54,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838256966] [2022-03-18 13:25:54,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 13:25:54,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 13:25:54,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:25:54,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 13:25:54,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 13:25:54,769 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 13:25:54,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:25:54,884 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2022-03-18 13:25:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 13:25:54,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 39 [2022-03-18 13:25:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:25:54,886 INFO L225 Difference]: With dead ends: 97 [2022-03-18 13:25:54,886 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 13:25:54,886 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-18 13:25:54,887 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:25:54,887 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:25:54,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 13:25:54,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-03-18 13:25:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 13:25:54,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-03-18 13:25:54,896 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 39 [2022-03-18 13:25:54,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:25:54,896 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-03-18 13:25:54,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 13:25:54,896 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-03-18 13:25:54,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 13:25:54,897 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:25:54,897 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:25:54,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 13:25:55,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:55,112 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:25:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:25:55,112 INFO L85 PathProgramCache]: Analyzing trace with hash 736401910, now seen corresponding path program 2 times [2022-03-18 13:25:55,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:25:55,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537613571] [2022-03-18 13:25:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:55,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:25:55,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:25:55,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208673675] [2022-03-18 13:25:55,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:25:55,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:55,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:25:55,119 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:25:55,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 13:25:55,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 13:25:55,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:25:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 13:25:55,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:25:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 13:25:55,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:25:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 13:25:55,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:25:55,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537613571] [2022-03-18 13:25:55,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:25:55,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208673675] [2022-03-18 13:25:55,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208673675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:25:55,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 13:25:55,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-18 13:25:55,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777994315] [2022-03-18 13:25:55,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 13:25:55,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 13:25:55,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:25:55,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 13:25:55,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-18 13:25:55,482 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 13:25:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:25:55,605 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2022-03-18 13:25:55,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 13:25:55,606 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2022-03-18 13:25:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:25:55,606 INFO L225 Difference]: With dead ends: 108 [2022-03-18 13:25:55,606 INFO L226 Difference]: Without dead ends: 102 [2022-03-18 13:25:55,607 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-18 13:25:55,607 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:25:55,607 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 159 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:25:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-18 13:25:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-03-18 13:25:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 13:25:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-03-18 13:25:55,617 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 49 [2022-03-18 13:25:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:25:55,617 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-03-18 13:25:55,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 13:25:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-03-18 13:25:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 13:25:55,618 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:25:55,619 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:25:55,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 13:25:55,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:55,835 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:25:55,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:25:55,836 INFO L85 PathProgramCache]: Analyzing trace with hash -248152202, now seen corresponding path program 3 times [2022-03-18 13:25:55,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:25:55,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171057552] [2022-03-18 13:25:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:25:55,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:25:55,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:25:55,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658370304] [2022-03-18 13:25:55,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 13:25:55,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:25:55,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:25:55,843 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:25:55,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 13:25:56,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 13:25:56,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:25:56,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 13:25:56,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:25:56,633 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 13:25:56,635 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 13:25:56,637 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 13:25:59,502 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) is different from false