/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/egcd3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 13:13:41,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 13:13:41,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 13:13:41,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 13:13:41,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 13:13:41,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 13:13:41,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 13:13:41,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-18 13:13:41,283 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 13:13:41,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 13:13:41,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 13:13:41,284 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 13:13:41,285 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 13:13:41,285 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 13:13:41,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 13:13:41,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 13:13:41,285 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 13:13:41,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 13:13:41,286 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 13:13:41,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 13:13:41,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 13:13:41,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 13:13:41,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 13:13:41,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 13:13:41,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 13:13:41,288 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 13:13:41,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 13:13:41,288 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 13:13:41,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 13:13:41,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 13:13:41,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 13:13:41,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 13:13:41,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 13:13:41,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 13:13:41,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 13:13:41,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 13:13:41,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 13:13:41,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 13:13:41,289 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 13:13:41,289 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 13:13:41,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 13:13:41,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 13:13:41,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 13:13:41,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 13:13:41,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 13:13:41,483 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 13:13:41,483 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 13:13:41,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-18 13:13:41,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e25b9d23/24b8d8f4b0184312b7904c1165cf28f1/FLAG571456884 [2022-03-18 13:13:42,001 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 13:13:42,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-18 13:13:42,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e25b9d23/24b8d8f4b0184312b7904c1165cf28f1/FLAG571456884 [2022-03-18 13:13:42,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e25b9d23/24b8d8f4b0184312b7904c1165cf28f1 [2022-03-18 13:13:42,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 13:13:42,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 13:13:42,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 13:13:42,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 13:13:42,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 13:13:42,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:13:42" (1/1) ... [2022-03-18 13:13:42,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fb6f872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:42, skipping insertion in model container [2022-03-18 13:13:42,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:13:42" (1/1) ... [2022-03-18 13:13:42,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 13:13:42,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 13:13:42,689 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/egcd3-ll.c[490,503] [2022-03-18 13:13:42,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 13:13:42,707 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 13:13:42,716 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/egcd3-ll.c[490,503] [2022-03-18 13:13:42,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 13:13:42,743 INFO L208 MainTranslator]: Completed translation [2022-03-18 13:13:42,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:42 WrapperNode [2022-03-18 13:13:42,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 13:13:42,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 13:13:42,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 13:13:42,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 13:13:42,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:42" (1/1) ... [2022-03-18 13:13:42,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:42" (1/1) ... [2022-03-18 13:13:42,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:42" (1/1) ... [2022-03-18 13:13:42,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:42" (1/1) ... [2022-03-18 13:13:42,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:42" (1/1) ... [2022-03-18 13:13:42,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:42" (1/1) ... [2022-03-18 13:13:42,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:42" (1/1) ... [2022-03-18 13:13:42,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 13:13:42,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 13:13:42,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 13:13:42,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 13:13:42,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:42" (1/1) ... [2022-03-18 13:13:42,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 13:13:42,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:42,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 13:13:42,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 13:13:42,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 13:13:42,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 13:13:42,844 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 13:13:42,844 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 13:13:42,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 13:13:42,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 13:13:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 13:13:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 13:13:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 13:13:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 13:13:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 13:13:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 13:13:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 13:13:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 13:13:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 13:13:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 13:13:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 13:13:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 13:13:42,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 13:13:42,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 13:13:42,886 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 13:13:42,888 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 13:13:42,990 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 13:13:42,994 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 13:13:42,994 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-18 13:13:42,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:13:42 BoogieIcfgContainer [2022-03-18 13:13:42,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 13:13:42,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 13:13:42,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 13:13:42,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 13:13:42,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 01:13:42" (1/3) ... [2022-03-18 13:13:42,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a3b5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:13:42, skipping insertion in model container [2022-03-18 13:13:42,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:42" (2/3) ... [2022-03-18 13:13:43,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a3b5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:13:42, skipping insertion in model container [2022-03-18 13:13:43,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:13:42" (3/3) ... [2022-03-18 13:13:43,000 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2022-03-18 13:13:43,004 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 13:13:43,004 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 13:13:43,054 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 13:13:43,059 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 13:13:43,059 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 13:13:43,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 13:13:43,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 13:13:43,101 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:43,101 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:43,101 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:43,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:43,105 INFO L85 PathProgramCache]: Analyzing trace with hash 642197559, now seen corresponding path program 1 times [2022-03-18 13:13:43,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:43,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392207778] [2022-03-18 13:13:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:43,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:43,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:13:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:43,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 13:13:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:43,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 13:13:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:13:43,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:43,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392207778] [2022-03-18 13:13:43,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392207778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:13:43,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:13:43,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 13:13:43,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802068520] [2022-03-18 13:13:43,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:13:43,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 13:13:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:43,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 13:13:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 13:13:43,313 INFO L87 Difference]: Start difference. First operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:13:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:43,380 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2022-03-18 13:13:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 13:13:43,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 13:13:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:43,392 INFO L225 Difference]: With dead ends: 67 [2022-03-18 13:13:43,392 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 13:13:43,395 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 13:13:43,397 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:43,398 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:13:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 13:13:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 13:13:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 13:13:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-03-18 13:13:43,435 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 22 [2022-03-18 13:13:43,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:43,436 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-03-18 13:13:43,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:13:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-03-18 13:13:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 13:13:43,437 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:43,437 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:43,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 13:13:43,438 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:43,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1042193974, now seen corresponding path program 1 times [2022-03-18 13:13:43,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:43,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129283917] [2022-03-18 13:13:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:43,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:43,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:13:43,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645406080] [2022-03-18 13:13:43,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:43,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:43,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:43,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:43,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 13:13:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:43,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 13:13:43,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 13:13:43,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 13:13:43,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:43,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129283917] [2022-03-18 13:13:43,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:13:43,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645406080] [2022-03-18 13:13:43,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645406080] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:13:43,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:13:43,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 13:13:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899627996] [2022-03-18 13:13:43,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:13:43,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 13:13:43,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 13:13:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 13:13:43,638 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:13:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:43,701 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-03-18 13:13:43,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 13:13:43,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-18 13:13:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:43,703 INFO L225 Difference]: With dead ends: 51 [2022-03-18 13:13:43,703 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 13:13:43,703 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 13:13:43,704 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:43,704 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 145 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:13:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 13:13:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2022-03-18 13:13:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 13:13:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-18 13:13:43,713 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2022-03-18 13:13:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:43,713 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-18 13:13:43,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:13:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-18 13:13:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 13:13:43,714 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:43,714 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:43,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 13:13:43,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:43,928 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:43,929 INFO L85 PathProgramCache]: Analyzing trace with hash -690034733, now seen corresponding path program 1 times [2022-03-18 13:13:43,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:43,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229589863] [2022-03-18 13:13:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:43,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:43,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:13:43,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350406693] [2022-03-18 13:13:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:43,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:43,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:43,959 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:43,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 13:13:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:44,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 13:13:44,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 13:13:44,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 13:13:44,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:44,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229589863] [2022-03-18 13:13:44,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:13:44,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350406693] [2022-03-18 13:13:44,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350406693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:13:44,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:13:44,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 13:13:44,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655230733] [2022-03-18 13:13:44,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:13:44,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 13:13:44,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:44,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 13:13:44,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-18 13:13:44,213 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:13:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:44,305 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2022-03-18 13:13:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 13:13:44,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-03-18 13:13:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:44,309 INFO L225 Difference]: With dead ends: 50 [2022-03-18 13:13:44,309 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 13:13:44,310 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-18 13:13:44,313 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:44,314 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 200 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:13:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 13:13:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-03-18 13:13:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 13:13:44,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-03-18 13:13:44,335 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 26 [2022-03-18 13:13:44,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:44,336 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-03-18 13:13:44,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 13:13:44,336 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-03-18 13:13:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 13:13:44,337 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:44,338 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:44,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-18 13:13:44,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 13:13:44,555 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:44,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:44,555 INFO L85 PathProgramCache]: Analyzing trace with hash -796982879, now seen corresponding path program 1 times [2022-03-18 13:13:44,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:44,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053009373] [2022-03-18 13:13:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:44,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:44,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:13:44,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445742932] [2022-03-18 13:13:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:44,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:44,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:44,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:44,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 13:13:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:44,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 13:13:44,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 13:13:44,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:13:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 13:13:44,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:44,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053009373] [2022-03-18 13:13:44,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:13:44,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445742932] [2022-03-18 13:13:44,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445742932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:13:44,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 13:13:44,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 13:13:44,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984098409] [2022-03-18 13:13:44,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 13:13:44,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 13:13:44,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:44,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 13:13:44,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 13:13:44,804 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:13:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:44,949 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2022-03-18 13:13:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 13:13:44,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-03-18 13:13:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:44,953 INFO L225 Difference]: With dead ends: 100 [2022-03-18 13:13:44,953 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 13:13:44,953 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-18 13:13:44,956 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 58 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:44,959 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 278 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:13:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 13:13:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2022-03-18 13:13:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 13:13:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-03-18 13:13:44,979 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 28 [2022-03-18 13:13:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:44,980 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-03-18 13:13:44,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:13:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-03-18 13:13:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 13:13:44,981 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:44,981 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:44,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 13:13:45,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:45,200 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:45,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1909913277, now seen corresponding path program 1 times [2022-03-18 13:13:45,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:45,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284266997] [2022-03-18 13:13:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:45,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:45,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:13:45,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736116399] [2022-03-18 13:13:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:45,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:45,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:45,214 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:45,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 13:13:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:45,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 13:13:45,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 13:13:45,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:13:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:13:45,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:45,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284266997] [2022-03-18 13:13:45,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:13:45,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736116399] [2022-03-18 13:13:45,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736116399] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 13:13:45,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 13:13:45,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-18 13:13:45,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381101741] [2022-03-18 13:13:45,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:13:45,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 13:13:45,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:45,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 13:13:45,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 13:13:45,508 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:13:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:45,543 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2022-03-18 13:13:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 13:13:45,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-03-18 13:13:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:45,544 INFO L225 Difference]: With dead ends: 76 [2022-03-18 13:13:45,544 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 13:13:45,544 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 13:13:45,545 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:45,545 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:13:45,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 13:13:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-03-18 13:13:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 13:13:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2022-03-18 13:13:45,554 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 31 [2022-03-18 13:13:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:45,554 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2022-03-18 13:13:45,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 13:13:45,554 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2022-03-18 13:13:45,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 13:13:45,555 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:45,555 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:45,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 13:13:45,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:45,772 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:45,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:45,772 INFO L85 PathProgramCache]: Analyzing trace with hash -709867384, now seen corresponding path program 1 times [2022-03-18 13:13:45,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:45,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169322165] [2022-03-18 13:13:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:45,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:45,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:13:45,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380509556] [2022-03-18 13:13:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:45,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:45,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:45,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:45,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 13:13:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:45,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 13:13:45,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 13:13:45,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:13:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:13:46,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:46,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169322165] [2022-03-18 13:13:46,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:13:46,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380509556] [2022-03-18 13:13:46,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380509556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:13:46,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 13:13:46,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-18 13:13:46,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178709003] [2022-03-18 13:13:46,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 13:13:46,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 13:13:46,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:46,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 13:13:46,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 13:13:46,029 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 13:13:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:46,155 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-03-18 13:13:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 13:13:46,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2022-03-18 13:13:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:46,157 INFO L225 Difference]: With dead ends: 108 [2022-03-18 13:13:46,157 INFO L226 Difference]: Without dead ends: 106 [2022-03-18 13:13:46,157 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-18 13:13:46,158 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 42 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:46,158 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 346 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:13:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-18 13:13:46,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2022-03-18 13:13:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 13:13:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2022-03-18 13:13:46,169 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 31 [2022-03-18 13:13:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:46,169 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2022-03-18 13:13:46,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 13:13:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2022-03-18 13:13:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 13:13:46,170 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:46,170 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:46,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 13:13:46,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:46,386 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1696776659, now seen corresponding path program 1 times [2022-03-18 13:13:46,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:46,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522202869] [2022-03-18 13:13:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:46,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:46,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:13:46,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854894893] [2022-03-18 13:13:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:46,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:46,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:46,397 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:46,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 13:13:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:46,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 13:13:46,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 13:13:46,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 13:13:46,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:46,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522202869] [2022-03-18 13:13:46,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:13:46,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854894893] [2022-03-18 13:13:46,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854894893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:13:46,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:13:46,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 13:13:46,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975082943] [2022-03-18 13:13:46,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:13:46,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 13:13:46,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:46,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 13:13:46,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 13:13:46,495 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 13:13:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:46,532 INFO L93 Difference]: Finished difference Result 148 states and 208 transitions. [2022-03-18 13:13:46,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 13:13:46,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-18 13:13:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:46,533 INFO L225 Difference]: With dead ends: 148 [2022-03-18 13:13:46,533 INFO L226 Difference]: Without dead ends: 146 [2022-03-18 13:13:46,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 13:13:46,534 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:46,534 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 131 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:13:46,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-18 13:13:46,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2022-03-18 13:13:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 8 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 13:13:46,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 200 transitions. [2022-03-18 13:13:46,550 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 200 transitions. Word has length 36 [2022-03-18 13:13:46,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:46,551 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 200 transitions. [2022-03-18 13:13:46,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 13:13:46,551 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 200 transitions. [2022-03-18 13:13:46,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 13:13:46,552 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:46,552 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:46,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 13:13:46,769 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:46,769 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:46,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:46,769 INFO L85 PathProgramCache]: Analyzing trace with hash 331267880, now seen corresponding path program 1 times [2022-03-18 13:13:46,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:46,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071191772] [2022-03-18 13:13:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:46,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:46,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:13:46,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295914503] [2022-03-18 13:13:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:46,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:46,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:46,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:46,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 13:13:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:46,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 13:13:46,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 13:13:47,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:13:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 13:13:47,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:47,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071191772] [2022-03-18 13:13:47,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:13:47,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295914503] [2022-03-18 13:13:47,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295914503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:13:47,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 13:13:47,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-18 13:13:47,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045845876] [2022-03-18 13:13:47,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 13:13:47,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 13:13:47,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:47,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 13:13:47,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-03-18 13:13:47,135 INFO L87 Difference]: Start difference. First operand 140 states and 200 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 13:13:47,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:47,969 INFO L93 Difference]: Finished difference Result 268 states and 390 transitions. [2022-03-18 13:13:47,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 13:13:47,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2022-03-18 13:13:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:47,971 INFO L225 Difference]: With dead ends: 268 [2022-03-18 13:13:47,971 INFO L226 Difference]: Without dead ends: 266 [2022-03-18 13:13:47,971 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-03-18 13:13:47,972 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 142 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:47,972 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 399 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 13:13:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-18 13:13:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 253. [2022-03-18 13:13:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 158 states have (on average 1.3101265822784811) internal successors, (207), 159 states have internal predecessors, (207), 85 states have call successors, (85), 10 states have call predecessors, (85), 9 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-18 13:13:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 375 transitions. [2022-03-18 13:13:47,998 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 375 transitions. Word has length 36 [2022-03-18 13:13:47,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:47,998 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 375 transitions. [2022-03-18 13:13:47,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 13:13:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 375 transitions. [2022-03-18 13:13:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 13:13:47,999 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:47,999 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:48,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 13:13:48,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:48,215 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1445301309, now seen corresponding path program 1 times [2022-03-18 13:13:48,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:48,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927631935] [2022-03-18 13:13:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:48,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:48,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:13:48,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103586830] [2022-03-18 13:13:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:48,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:48,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:48,225 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:48,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 13:13:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 13:13:48,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 13:13:48,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 13:13:48,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:48,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927631935] [2022-03-18 13:13:48,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:13:48,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103586830] [2022-03-18 13:13:48,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103586830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:13:48,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:13:48,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 13:13:48,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678869401] [2022-03-18 13:13:48,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:13:48,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 13:13:48,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:48,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 13:13:48,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 13:13:48,323 INFO L87 Difference]: Start difference. First operand 253 states and 375 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 13:13:48,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:48,392 INFO L93 Difference]: Finished difference Result 414 states and 645 transitions. [2022-03-18 13:13:48,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 13:13:48,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-03-18 13:13:48,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:48,395 INFO L225 Difference]: With dead ends: 414 [2022-03-18 13:13:48,395 INFO L226 Difference]: Without dead ends: 412 [2022-03-18 13:13:48,396 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 13:13:48,396 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:48,397 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 142 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:13:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-03-18 13:13:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 357. [2022-03-18 13:13:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 181 states have (on average 1.270718232044199) internal successors, (230), 202 states have internal predecessors, (230), 165 states have call successors, (165), 11 states have call predecessors, (165), 10 states have return successors, (163), 143 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-18 13:13:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 558 transitions. [2022-03-18 13:13:48,436 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 558 transitions. Word has length 41 [2022-03-18 13:13:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:48,436 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 558 transitions. [2022-03-18 13:13:48,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 13:13:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 558 transitions. [2022-03-18 13:13:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 13:13:48,437 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:48,437 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:48,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 13:13:48,658 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 13:13:48,658 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:48,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:48,658 INFO L85 PathProgramCache]: Analyzing trace with hash -810649216, now seen corresponding path program 1 times [2022-03-18 13:13:48,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:48,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466551955] [2022-03-18 13:13:48,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:48,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:48,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:13:48,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640071374] [2022-03-18 13:13:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:48,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:48,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:48,667 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:48,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 13:13:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:48,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-18 13:13:48,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 13:13:49,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:13:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 13:13:49,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:13:49,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466551955] [2022-03-18 13:13:49,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:13:49,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640071374] [2022-03-18 13:13:49,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640071374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:13:49,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 13:13:49,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-18 13:13:49,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120080058] [2022-03-18 13:13:49,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 13:13:49,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 13:13:49,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:13:49,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 13:13:49,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-18 13:13:49,765 INFO L87 Difference]: Start difference. First operand 357 states and 558 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 13:13:56,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:13:56,536 INFO L93 Difference]: Finished difference Result 713 states and 1105 transitions. [2022-03-18 13:13:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 13:13:56,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 53 [2022-03-18 13:13:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:13:56,545 INFO L225 Difference]: With dead ends: 713 [2022-03-18 13:13:56,545 INFO L226 Difference]: Without dead ends: 546 [2022-03-18 13:13:56,549 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=415, Invalid=1841, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 13:13:56,550 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 129 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-18 13:13:56,551 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 450 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-18 13:13:56,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-03-18 13:13:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 465. [2022-03-18 13:13:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 261 states have (on average 1.260536398467433) internal successors, (329), 280 states have internal predecessors, (329), 189 states have call successors, (189), 15 states have call predecessors, (189), 14 states have return successors, (187), 169 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-18 13:13:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 705 transitions. [2022-03-18 13:13:56,661 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 705 transitions. Word has length 53 [2022-03-18 13:13:56,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:13:56,662 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 705 transitions. [2022-03-18 13:13:56,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 13:13:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 705 transitions. [2022-03-18 13:13:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 13:13:56,664 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:13:56,664 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:13:56,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 13:13:56,881 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 13:13:56,881 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:13:56,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:13:56,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1658124158, now seen corresponding path program 1 times [2022-03-18 13:13:56,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:13:56,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808477328] [2022-03-18 13:13:56,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:56,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:13:56,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:13:56,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848817776] [2022-03-18 13:13:56,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:13:56,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:13:56,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:13:56,894 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:13:56,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 13:13:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:13:56,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 13:13:56,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:13:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-03-18 13:13:57,274 INFO L328 TraceCheckSpWp]: Computing backward predicates...