/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-7390193 [2022-04-04 20:39:14,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-04 20:39:14,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-04 20:39:14,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-04 20:39:14,350 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 [2022-04-04 20:39:14,378 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-04 20:39:14,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-04 20:39:14,379 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-04 20:39:14,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-04 20:39:14,380 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-04 20:39:14,380 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-04 20:39:14,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-04 20:39:14,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-04 20:39:14,381 INFO L138 SettingsManager]: * Use SBE=true [2022-04-04 20:39:14,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-04 20:39:14,382 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-04 20:39:14,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-04 20:39:14,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-04 20:39:14,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-04 20:39:14,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-04 20:39:14,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-04 20:39:14,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-04 20:39:14,383 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-04 20:39:14,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-04 20:39:14,384 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-04 20:39:14,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-04 20:39:14,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-04 20:39:14,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-04 20:39:14,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-04 20:39:14,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-04 20:39:14,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-04 20:39:14,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-04 20:39:14,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-04 20:39:14,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-04 20:39:14,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-04 20:39:14,392 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-04-04 20:39:14,392 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-04 20:39:14,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-04 20:39:14,392 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-04 20:39:14,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-04 20:39:14,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-04 20:39:14,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-04 20:39:14,623 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-04 20:39:14,624 INFO L275 PluginConnector]: CDTParser initialized [2022-04-04 20:39:14,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-04-04 20:39:14,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d9c39870/dc2ca0074cc94aad9651cb7a841f1797/FLAGa0172fcff [2022-04-04 20:39:15,052 INFO L306 CDTParser]: Found 1 translation units. [2022-04-04 20:39:15,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-04-04 20:39:15,060 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d9c39870/dc2ca0074cc94aad9651cb7a841f1797/FLAGa0172fcff [2022-04-04 20:39:15,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d9c39870/dc2ca0074cc94aad9651cb7a841f1797 [2022-04-04 20:39:15,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-04 20:39:15,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-04 20:39:15,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-04 20:39:15,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-04 20:39:15,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-04 20:39:15,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.04 08:39:15" (1/1) ... [2022-04-04 20:39:15,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a8155ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:39:15, skipping insertion in model container [2022-04-04 20:39:15,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.04 08:39:15" (1/1) ... [2022-04-04 20:39:15,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-04 20:39:15,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-04 20:39:15,300 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] [2022-04-04 20:39:15,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-04 20:39:15,326 INFO L203 MainTranslator]: Completed pre-run [2022-04-04 20:39:15,344 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] [2022-04-04 20:39:15,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-04 20:39:15,373 INFO L208 MainTranslator]: Completed translation [2022-04-04 20:39:15,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:39:15 WrapperNode [2022-04-04 20:39:15,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-04 20:39:15,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-04 20:39:15,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-04 20:39:15,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-04 20:39:15,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:39:15" (1/1) ... [2022-04-04 20:39:15,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:39:15" (1/1) ... [2022-04-04 20:39:15,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:39:15" (1/1) ... [2022-04-04 20:39:15,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:39:15" (1/1) ... [2022-04-04 20:39:15,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:39:15" (1/1) ... [2022-04-04 20:39:15,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:39:15" (1/1) ... [2022-04-04 20:39:15,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:39:15" (1/1) ... [2022-04-04 20:39:15,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-04 20:39:15,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-04 20:39:15,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-04 20:39:15,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-04 20:39:15,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:39:15" (1/1) ... [2022-04-04 20:39:15,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-04 20:39:15,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 20:39:15,432 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) [2022-04-04 20:39:15,437 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 [2022-04-04 20:39:15,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-04 20:39:15,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-04 20:39:15,465 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-04 20:39:15,467 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-04 20:39:15,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-04 20:39:15,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-04 20:39:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-04 20:39:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-04 20:39:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-04 20:39:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-04 20:39:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-04 20:39:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-04 20:39:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-04 20:39:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-04 20:39:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-04 20:39:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-04 20:39:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-04 20:39:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-04 20:39:15,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-04 20:39:15,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-04 20:39:15,541 INFO L234 CfgBuilder]: Building ICFG [2022-04-04 20:39:15,543 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-04 20:39:15,683 INFO L275 CfgBuilder]: Performing block encoding [2022-04-04 20:39:15,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-04 20:39:15,704 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-04 20:39:15,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.04 08:39:15 BoogieIcfgContainer [2022-04-04 20:39:15,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-04 20:39:15,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-04 20:39:15,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-04 20:39:15,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-04 20:39:15,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.04 08:39:15" (1/3) ... [2022-04-04 20:39:15,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f7cc81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.04 08:39:15, skipping insertion in model container [2022-04-04 20:39:15,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:39:15" (2/3) ... [2022-04-04 20:39:15,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f7cc81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.04 08:39:15, skipping insertion in model container [2022-04-04 20:39:15,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.04 08:39:15" (3/3) ... [2022-04-04 20:39:15,713 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.c [2022-04-04 20:39:15,718 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-04 20:39:15,718 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-04 20:39:15,756 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-04 20:39:15,761 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 [2022-04-04 20:39:15,761 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-04 20:39:15,775 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) [2022-04-04 20:39:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-04 20:39:15,780 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:39:15,780 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:39:15,781 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:39:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:39:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2022-04-04 20:39:15,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:39:15,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123210399] [2022-04-04 20:39:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:15,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:39:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:39:15,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 20:39:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:39:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:39:15,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 20:39:15,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123210399] [2022-04-04 20:39:15,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123210399] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 20:39:15,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 20:39:15,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-04 20:39:15,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356424457] [2022-04-04 20:39:15,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 20:39:15,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-04 20:39:15,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 20:39:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-04 20:39:15,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-04 20:39:15,967 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) [2022-04-04 20:39:16,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 20:39:16,034 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-04-04 20:39:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-04 20:39:16,036 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 [2022-04-04 20:39:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 20:39:16,042 INFO L225 Difference]: With dead ends: 45 [2022-04-04 20:39:16,042 INFO L226 Difference]: Without dead ends: 21 [2022-04-04 20:39:16,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-04 20:39:16,048 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-04 20:39:16,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-04 20:39:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-04 20:39:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-04-04 20:39:16,077 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) [2022-04-04 20:39:16,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-04-04 20:39:16,078 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-04-04 20:39:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 20:39:16,079 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-04-04 20:39:16,079 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) [2022-04-04 20:39:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-04-04 20:39:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-04 20:39:16,080 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:39:16,080 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:39:16,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-04 20:39:16,081 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:39:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:39:16,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2022-04-04 20:39:16,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:39:16,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931256672] [2022-04-04 20:39:16,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:16,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:39:16,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 20:39:16,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333802606] [2022-04-04 20:39:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:16,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 20:39:16,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 20:39:16,105 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) [2022-04-04 20:39:16,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-04 20:39:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:39:16,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-04 20:39:16,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 20:39:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:39:16,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-04 20:39:16,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 20:39:16,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931256672] [2022-04-04 20:39:16,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 20:39:16,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333802606] [2022-04-04 20:39:16,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333802606] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 20:39:16,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 20:39:16,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-04 20:39:16,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582000615] [2022-04-04 20:39:16,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 20:39:16,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-04 20:39:16,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 20:39:16,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-04 20:39:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-04 20:39:16,347 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) [2022-04-04 20:39:16,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 20:39:16,418 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-04-04 20:39:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-04 20:39:16,419 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 [2022-04-04 20:39:16,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 20:39:16,420 INFO L225 Difference]: With dead ends: 34 [2022-04-04 20:39:16,420 INFO L226 Difference]: Without dead ends: 29 [2022-04-04 20:39:16,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-04 20:39:16,422 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-04 20:39:16,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-04 20:39:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-04 20:39:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-04 20:39:16,429 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) [2022-04-04 20:39:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-04-04 20:39:16,430 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-04-04 20:39:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 20:39:16,430 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-04-04 20:39:16,430 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) [2022-04-04 20:39:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-04-04 20:39:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-04 20:39:16,431 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:39:16,431 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:39:16,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-04 20:39:16,643 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 [2022-04-04 20:39:16,644 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:39:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:39:16,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 1 times [2022-04-04 20:39:16,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:39:16,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426347954] [2022-04-04 20:39:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:16,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:39:16,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 20:39:16,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994518279] [2022-04-04 20:39:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:16,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 20:39:16,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 20:39:16,676 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) [2022-04-04 20:39:16,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-04 20:39:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:39:16,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-04 20:39:16,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 20:39:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:39:16,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 20:39:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-04 20:39:17,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 20:39:17,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426347954] [2022-04-04 20:39:17,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 20:39:17,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994518279] [2022-04-04 20:39:17,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994518279] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 20:39:17,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 20:39:17,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-04-04 20:39:17,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785224359] [2022-04-04 20:39:17,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 20:39:17,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-04 20:39:17,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 20:39:17,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-04 20:39:17,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-04 20:39:17,116 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) [2022-04-04 20:39:17,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 20:39:17,305 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-04-04 20:39:17,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-04 20:39:17,306 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 [2022-04-04 20:39:17,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 20:39:17,309 INFO L225 Difference]: With dead ends: 45 [2022-04-04 20:39:17,309 INFO L226 Difference]: Without dead ends: 38 [2022-04-04 20:39:17,311 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-04-04 20:39:17,314 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 20:39:17,315 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-04 20:39:17,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-04 20:39:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-04-04 20:39:17,328 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) [2022-04-04 20:39:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-04-04 20:39:17,332 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-04-04 20:39:17,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 20:39:17,332 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-04-04 20:39:17,332 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) [2022-04-04 20:39:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-04-04 20:39:17,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-04 20:39:17,334 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:39:17,334 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:39:17,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-04 20:39:17,547 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 [2022-04-04 20:39:17,548 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:39:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:39:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 1 times [2022-04-04 20:39:17,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:39:17,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563459820] [2022-04-04 20:39:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:17,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:39:17,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 20:39:17,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074511104] [2022-04-04 20:39:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:17,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 20:39:17,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 20:39:17,562 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) [2022-04-04 20:39:17,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-04 20:39:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:39:17,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-04 20:39:17,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 20:39:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:39:17,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 20:39:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:39:17,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 20:39:17,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563459820] [2022-04-04 20:39:17,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 20:39:17,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074511104] [2022-04-04 20:39:17,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074511104] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 20:39:17,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 20:39:17,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-04 20:39:17,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266282151] [2022-04-04 20:39:17,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 20:39:17,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-04 20:39:17,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 20:39:17,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-04 20:39:17,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-04 20:39:17,772 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) [2022-04-04 20:39:17,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 20:39:17,845 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-04-04 20:39:17,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-04 20:39:17,846 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 [2022-04-04 20:39:17,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 20:39:17,848 INFO L225 Difference]: With dead ends: 77 [2022-04-04 20:39:17,849 INFO L226 Difference]: Without dead ends: 71 [2022-04-04 20:39:17,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-04 20:39:17,853 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-04 20:39:17,859 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-04 20:39:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-04 20:39:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-04-04 20:39:17,875 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) [2022-04-04 20:39:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-04-04 20:39:17,878 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-04-04 20:39:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 20:39:17,879 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-04-04 20:39:17,879 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) [2022-04-04 20:39:17,881 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-04-04 20:39:17,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-04 20:39:17,888 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:39:17,888 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:39:17,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-04 20:39:18,103 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 [2022-04-04 20:39:18,103 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:39:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:39:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1132431350, now seen corresponding path program 1 times [2022-04-04 20:39:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:39:18,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277139732] [2022-04-04 20:39:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:18,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:39:18,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 20:39:18,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536482593] [2022-04-04 20:39:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:18,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 20:39:18,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 20:39:18,118 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) [2022-04-04 20:39:18,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-04 20:39:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:39:18,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-04 20:39:18,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 20:39:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-04 20:39:18,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 20:39:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-04 20:39:18,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 20:39:18,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277139732] [2022-04-04 20:39:18,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 20:39:18,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536482593] [2022-04-04 20:39:18,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536482593] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 20:39:18,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 20:39:18,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-04-04 20:39:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501871935] [2022-04-04 20:39:18,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 20:39:18,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-04 20:39:18,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 20:39:18,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-04 20:39:18,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-04-04 20:39:18,951 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) [2022-04-04 20:39:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 20:39:19,497 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-04-04 20:39:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-04 20:39:19,498 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 [2022-04-04 20:39:19,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 20:39:19,499 INFO L225 Difference]: With dead ends: 85 [2022-04-04 20:39:19,499 INFO L226 Difference]: Without dead ends: 77 [2022-04-04 20:39:19,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-04-04 20:39:19,500 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 20:39:19,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 140 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-04-04 20:39:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-04 20:39:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-04-04 20:39:19,511 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) [2022-04-04 20:39:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-04-04 20:39:19,512 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29 [2022-04-04 20:39:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 20:39:19,513 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-04-04 20:39:19,513 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) [2022-04-04 20:39:19,513 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-04-04 20:39:19,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-04 20:39:19,514 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:39:19,514 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:39:19,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-04 20:39:19,727 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 [2022-04-04 20:39:19,727 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:39:19,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:39:19,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1565736524, now seen corresponding path program 1 times [2022-04-04 20:39:19,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:39:19,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42023883] [2022-04-04 20:39:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:19,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:39:19,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 20:39:19,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150275203] [2022-04-04 20:39:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:19,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 20:39:19,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 20:39:19,739 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) [2022-04-04 20:39:19,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-04 20:39:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:39:19,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-04 20:39:19,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 20:39:19,945 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-04 20:39:19,948 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-04 20:39:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-04 20:39:22,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 20:39:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-04 20:39:22,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 20:39:22,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42023883] [2022-04-04 20:39:22,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 20:39:22,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150275203] [2022-04-04 20:39:22,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150275203] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 20:39:22,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 20:39:22,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-04-04 20:39:22,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365647107] [2022-04-04 20:39:22,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 20:39:22,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-04 20:39:22,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 20:39:22,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-04 20:39:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=247, Unknown=1, NotChecked=0, Total=306 [2022-04-04 20:39:22,578 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) [2022-04-04 20:39:24,806 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 [] [2022-04-04 20:39:28,832 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-04 20:39:30,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-04 20:39:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 20:39:33,123 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2022-04-04 20:39:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-04 20:39:33,128 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 [2022-04-04 20:39:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 20:39:33,129 INFO L225 Difference]: With dead ends: 96 [2022-04-04 20:39:33,129 INFO L226 Difference]: Without dead ends: 90 [2022-04-04 20:39:33,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=117, Invalid=432, Unknown=3, NotChecked=0, Total=552 [2022-04-04 20:39:33,129 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-04-04 20:39:33,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 154 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 210 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2022-04-04 20:39:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-04 20:39:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-04-04 20:39:33,141 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) [2022-04-04 20:39:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2022-04-04 20:39:33,143 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39 [2022-04-04 20:39:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 20:39:33,144 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2022-04-04 20:39:33,144 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) [2022-04-04 20:39:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2022-04-04 20:39:33,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-04 20:39:33,145 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:39:33,145 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:39:33,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-04 20:39:33,355 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 [2022-04-04 20:39:33,356 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:39:33,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:39:33,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1425187914, now seen corresponding path program 1 times [2022-04-04 20:39:33,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:39:33,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607384523] [2022-04-04 20:39:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:33,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:39:33,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 20:39:33,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512989750] [2022-04-04 20:39:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:33,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 20:39:33,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 20:39:33,371 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) [2022-04-04 20:39:33,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-04 20:39:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:39:33,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-04 20:39:33,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 20:39:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-04 20:39:33,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 20:39:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-04 20:39:33,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 20:39:33,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607384523] [2022-04-04 20:39:33,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 20:39:33,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512989750] [2022-04-04 20:39:33,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512989750] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 20:39:33,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 20:39:33,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-04 20:39:33,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005572306] [2022-04-04 20:39:33,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 20:39:33,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-04 20:39:33,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 20:39:33,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-04 20:39:33,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-04 20:39:33,803 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) [2022-04-04 20:39:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 20:39:33,964 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2022-04-04 20:39:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-04 20:39:33,965 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 [2022-04-04 20:39:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 20:39:33,966 INFO L225 Difference]: With dead ends: 97 [2022-04-04 20:39:33,966 INFO L226 Difference]: Without dead ends: 91 [2022-04-04 20:39:33,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-04-04 20:39:33,967 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 20:39:33,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 100 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-04 20:39:33,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-04 20:39:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-04-04 20:39:33,978 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) [2022-04-04 20:39:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-04-04 20:39:33,979 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 39 [2022-04-04 20:39:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 20:39:33,980 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-04-04 20:39:33,980 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) [2022-04-04 20:39:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-04-04 20:39:33,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-04 20:39:33,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:39:33,981 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:39:34,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-04 20:39:34,199 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 [2022-04-04 20:39:34,199 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:39:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:39:34,200 INFO L85 PathProgramCache]: Analyzing trace with hash 736401910, now seen corresponding path program 2 times [2022-04-04 20:39:34,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:39:34,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674539634] [2022-04-04 20:39:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:34,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:39:34,207 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 20:39:34,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76777851] [2022-04-04 20:39:34,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-04 20:39:34,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 20:39:34,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 20:39:34,209 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) [2022-04-04 20:39:34,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-04 20:39:34,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-04 20:39:34,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 20:39:34,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-04 20:39:34,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 20:39:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-04 20:39:34,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 20:39:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-04 20:39:34,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 20:39:34,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674539634] [2022-04-04 20:39:34,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-04 20:39:34,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76777851] [2022-04-04 20:39:34,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76777851] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 20:39:34,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 20:39:34,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-04 20:39:34,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970502499] [2022-04-04 20:39:34,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 20:39:34,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-04 20:39:34,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 20:39:34,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-04 20:39:34,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-04 20:39:34,739 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) [2022-04-04 20:39:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 20:39:34,927 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2022-04-04 20:39:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-04 20:39:34,927 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 [2022-04-04 20:39:34,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 20:39:34,928 INFO L225 Difference]: With dead ends: 108 [2022-04-04 20:39:34,928 INFO L226 Difference]: Without dead ends: 102 [2022-04-04 20:39:34,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-04-04 20:39:34,929 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 20:39:34,929 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-04 20:39:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-04 20:39:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-04-04 20:39:34,941 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) [2022-04-04 20:39:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-04-04 20:39:34,942 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 49 [2022-04-04 20:39:34,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 20:39:34,942 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-04-04 20:39:34,943 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) [2022-04-04 20:39:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-04-04 20:39:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-04 20:39:34,944 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:39:34,944 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:39:34,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-04 20:39:35,159 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 [2022-04-04 20:39:35,159 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:39:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:39:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash -248152202, now seen corresponding path program 3 times [2022-04-04 20:39:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:39:35,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199576372] [2022-04-04 20:39:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:39:35,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:39:35,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-04 20:39:35,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122566573] [2022-04-04 20:39:35,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-04 20:39:35,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 20:39:35,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 20:39:35,170 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) [2022-04-04 20:39:35,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-04 20:39:35,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-04 20:39:35,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 20:39:35,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-04 20:39:35,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 20:39:35,976 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-04 20:39:35,985 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-04 20:39:35,987 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-04 20:39:39,608 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 [2022-04-04 20:45:07,108 WARN L232 SmtUtils]: Spent 5.47s on a formula simplification that was a NOOP. DAG size: 19 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-04 20:46:38,197 WARN L232 SmtUtils]: Spent 10.08s on a formula simplification that was a NOOP. DAG size: 8 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)