/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 11:40:19,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 11:40:19,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 11:40:20,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 11:40:20,096 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 [2022-03-17 11:40:20,135 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 11:40:20,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 11:40:20,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-17 11:40:20,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-17 11:40:20,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 11:40:20,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 11:40:20,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 11:40:20,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 11:40:20,138 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 11:40:20,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 11:40:20,139 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 11:40:20,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 11:40:20,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 11:40:20,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 11:40:20,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 11:40:20,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 11:40:20,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 11:40:20,141 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 11:40:20,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 11:40:20,141 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 11:40:20,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 11:40:20,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 11:40:20,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 11:40:20,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 11:40:20,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 11:40:20,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 11:40:20,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 11:40:20,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 11:40:20,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 11:40:20,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 11:40:20,143 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-17 11:40:20,143 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-17 11:40:20,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 11:40:20,143 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 11:40:20,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 11:40:20,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 11:40:20,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 11:40:20,434 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 11:40:20,434 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 11:40:20,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound5.i [2022-03-17 11:40:20,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/140b7ad8d/33da31a0bd2f4b96bf6312446acc0cf5/FLAGae73e705b [2022-03-17 11:40:20,916 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 11:40:20,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound5.i [2022-03-17 11:40:20,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/140b7ad8d/33da31a0bd2f4b96bf6312446acc0cf5/FLAGae73e705b [2022-03-17 11:40:20,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/140b7ad8d/33da31a0bd2f4b96bf6312446acc0cf5 [2022-03-17 11:40:20,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 11:40:20,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-17 11:40:20,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 11:40:20,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 11:40:20,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 11:40:20,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:40:20" (1/1) ... [2022-03-17 11:40:20,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@734f7e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:40:20, skipping insertion in model container [2022-03-17 11:40:20,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:40:20" (1/1) ... [2022-03-17 11:40:20,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 11:40:20,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 11:40:21,127 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2022-03-17 11:40:21,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 11:40:21,152 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 11:40:21,162 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2022-03-17 11:40:21,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 11:40:21,177 INFO L208 MainTranslator]: Completed translation [2022-03-17 11:40:21,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:40:21 WrapperNode [2022-03-17 11:40:21,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 11:40:21,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 11:40:21,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 11:40:21,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 11:40:21,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:40:21" (1/1) ... [2022-03-17 11:40:21,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:40:21" (1/1) ... [2022-03-17 11:40:21,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:40:21" (1/1) ... [2022-03-17 11:40:21,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:40:21" (1/1) ... [2022-03-17 11:40:21,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:40:21" (1/1) ... [2022-03-17 11:40:21,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:40:21" (1/1) ... [2022-03-17 11:40:21,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:40:21" (1/1) ... [2022-03-17 11:40:21,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 11:40:21,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 11:40:21,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 11:40:21,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 11:40:21,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:40:21" (1/1) ... [2022-03-17 11:40:21,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 11:40:21,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:40:21,240 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) [2022-03-17 11:40:21,247 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 [2022-03-17 11:40:21,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 11:40:21,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 11:40:21,273 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 11:40:21,273 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 11:40:21,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 11:40:21,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 11:40:21,273 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 11:40:21,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 11:40:21,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 11:40:21,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 11:40:21,273 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 11:40:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 11:40:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 11:40:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 11:40:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 11:40:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 11:40:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 11:40:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 11:40:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 11:40:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 11:40:21,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 11:40:21,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 11:40:21,331 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 11:40:21,335 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 11:40:21,534 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 11:40:21,539 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 11:40:21,540 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 11:40:21,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:40:21 BoogieIcfgContainer [2022-03-17 11:40:21,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 11:40:21,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 11:40:21,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 11:40:21,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 11:40:21,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 11:40:20" (1/3) ... [2022-03-17 11:40:21,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365782b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:40:21, skipping insertion in model container [2022-03-17 11:40:21,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:40:21" (2/3) ... [2022-03-17 11:40:21,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365782b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:40:21, skipping insertion in model container [2022-03-17 11:40:21,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:40:21" (3/3) ... [2022-03-17 11:40:21,557 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2022-03-17 11:40:21,562 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 11:40:21,562 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 11:40:21,686 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 11:40:21,704 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 [2022-03-17 11:40:21,704 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 11:40:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 11:40:21,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 11:40:21,742 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:40:21,747 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] [2022-03-17 11:40:21,748 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:40:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:40:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash 878397729, now seen corresponding path program 1 times [2022-03-17 11:40:21,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:40:21,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197499560] [2022-03-17 11:40:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:21,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:40:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:40:21,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 11:40:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:40:22,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 11:40:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:40:22,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 11:40:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:40:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 11:40:22,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:40:22,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197499560] [2022-03-17 11:40:22,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197499560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 11:40:22,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 11:40:22,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 11:40:22,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137579765] [2022-03-17 11:40:22,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 11:40:22,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 11:40:22,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:40:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 11:40:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 11:40:22,089 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 11:40:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:40:22,196 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2022-03-17 11:40:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 11:40:22,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-17 11:40:22,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:40:22,212 INFO L225 Difference]: With dead ends: 60 [2022-03-17 11:40:22,212 INFO L226 Difference]: Without dead ends: 29 [2022-03-17 11:40:22,216 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 [2022-03-17 11:40:22,224 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 11:40:22,226 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 11:40:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-17 11:40:22,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-17 11:40:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 11:40:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-03-17 11:40:22,265 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2022-03-17 11:40:22,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:40:22,266 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-03-17 11:40:22,266 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 11:40:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-03-17 11:40:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 11:40:22,268 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:40:22,268 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] [2022-03-17 11:40:22,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 11:40:22,269 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:40:22,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:40:22,269 INFO L85 PathProgramCache]: Analyzing trace with hash 994169231, now seen corresponding path program 1 times [2022-03-17 11:40:22,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:40:22,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164209047] [2022-03-17 11:40:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:22,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:40:22,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:40:22,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279388098] [2022-03-17 11:40:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:22,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:40:22,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:40:22,291 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) [2022-03-17 11:40:22,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 11:40:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:40:22,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 11:40:22,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:40:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 11:40:22,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 11:40:22,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:40:22,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164209047] [2022-03-17 11:40:22,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:40:22,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279388098] [2022-03-17 11:40:22,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279388098] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 11:40:22,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 11:40:22,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 11:40:22,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266022204] [2022-03-17 11:40:22,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 11:40:22,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 11:40:22,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:40:22,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 11:40:22,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 11:40:22,533 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 11:40:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:40:22,560 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-03-17 11:40:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 11:40:22,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-03-17 11:40:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:40:22,562 INFO L225 Difference]: With dead ends: 42 [2022-03-17 11:40:22,563 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 11:40:22,563 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 11:40:22,565 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 11:40:22,565 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 11:40:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 11:40:22,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-17 11:40:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 11:40:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-03-17 11:40:22,575 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2022-03-17 11:40:22,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:40:22,576 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-03-17 11:40:22,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 11:40:22,577 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-03-17 11:40:22,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 11:40:22,577 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:40:22,578 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] [2022-03-17 11:40:22,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 11:40:22,778 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 [2022-03-17 11:40:22,779 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:40:22,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:40:22,780 INFO L85 PathProgramCache]: Analyzing trace with hash 422434646, now seen corresponding path program 1 times [2022-03-17 11:40:22,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:40:22,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266639374] [2022-03-17 11:40:22,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:22,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:40:22,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:40:22,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797951284] [2022-03-17 11:40:22,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:22,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:40:22,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:40:22,813 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) [2022-03-17 11:40:22,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 11:40:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:40:22,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 11:40:22,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:40:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 11:40:23,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 11:40:23,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:40:23,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266639374] [2022-03-17 11:40:23,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:40:23,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797951284] [2022-03-17 11:40:23,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797951284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 11:40:23,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 11:40:23,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 11:40:23,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472577979] [2022-03-17 11:40:23,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 11:40:23,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 11:40:23,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:40:23,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 11:40:23,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 11:40:23,023 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 11:40:23,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:40:23,050 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-03-17 11:40:23,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 11:40:23,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-03-17 11:40:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:40:23,051 INFO L225 Difference]: With dead ends: 41 [2022-03-17 11:40:23,052 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 11:40:23,052 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 11:40:23,053 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 11:40:23,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 97 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 11:40:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 11:40:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-03-17 11:40:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 11:40:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-03-17 11:40:23,060 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2022-03-17 11:40:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:40:23,061 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-03-17 11:40:23,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 11:40:23,061 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-03-17 11:40:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 11:40:23,062 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:40:23,062 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] [2022-03-17 11:40:23,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 11:40:23,271 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 [2022-03-17 11:40:23,272 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:40:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:40:23,272 INFO L85 PathProgramCache]: Analyzing trace with hash 424222106, now seen corresponding path program 1 times [2022-03-17 11:40:23,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:40:23,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885124192] [2022-03-17 11:40:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:23,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:40:23,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:40:23,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289070157] [2022-03-17 11:40:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:23,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:40:23,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:40:23,291 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) [2022-03-17 11:40:23,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 11:40:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:40:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 11:40:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:40:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 11:40:23,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:40:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 11:40:23,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:40:23,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885124192] [2022-03-17 11:40:23,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:40:23,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289070157] [2022-03-17 11:40:23,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289070157] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 11:40:23,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 11:40:23,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 11:40:23,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886440903] [2022-03-17 11:40:23,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 11:40:23,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 11:40:23,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:40:23,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 11:40:23,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 11:40:23,766 INFO L87 Difference]: Start difference. First operand 33 states and 40 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 11:40:25,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 11:40:25,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:40:25,943 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-03-17 11:40:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 11:40:25,944 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-03-17 11:40:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:40:25,945 INFO L225 Difference]: With dead ends: 42 [2022-03-17 11:40:25,945 INFO L226 Difference]: Without dead ends: 39 [2022-03-17 11:40:25,946 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-17 11:40:25,947 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-17 11:40:25,947 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-17 11:40:25,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-17 11:40:25,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-17 11:40:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 11:40:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-03-17 11:40:25,955 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 26 [2022-03-17 11:40:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:40:25,955 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-03-17 11:40:25,955 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 11:40:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-03-17 11:40:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 11:40:25,956 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:40:25,956 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] [2022-03-17 11:40:25,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 11:40:26,181 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 [2022-03-17 11:40:26,182 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:40:26,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:40:26,182 INFO L85 PathProgramCache]: Analyzing trace with hash -193375877, now seen corresponding path program 1 times [2022-03-17 11:40:26,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:40:26,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562713946] [2022-03-17 11:40:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:26,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:40:26,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:40:26,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233946005] [2022-03-17 11:40:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:26,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:40:26,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:40:26,203 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) [2022-03-17 11:40:26,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 11:40:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:40:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 11:40:26,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:40:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 11:40:26,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:40:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 11:40:26,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:40:26,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562713946] [2022-03-17 11:40:26,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:40:26,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233946005] [2022-03-17 11:40:26,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233946005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:40:26,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:40:26,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 11:40:26,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333442412] [2022-03-17 11:40:26,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:40:26,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 11:40:26,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:40:26,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 11:40:26,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 11:40:26,534 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 11:40:26,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:40:26,664 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-03-17 11:40:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 11:40:26,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2022-03-17 11:40:26,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:40:26,667 INFO L225 Difference]: With dead ends: 73 [2022-03-17 11:40:26,667 INFO L226 Difference]: Without dead ends: 61 [2022-03-17 11:40:26,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-17 11:40:26,669 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 11:40:26,669 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 122 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 11:40:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-17 11:40:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2022-03-17 11:40:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 11:40:26,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-03-17 11:40:26,677 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 28 [2022-03-17 11:40:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:40:26,678 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-03-17 11:40:26,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 11:40:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-03-17 11:40:26,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 11:40:26,679 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:40:26,679 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:40:26,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 11:40:26,894 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 [2022-03-17 11:40:26,895 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:40:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:40:26,895 INFO L85 PathProgramCache]: Analyzing trace with hash -2031725334, now seen corresponding path program 1 times [2022-03-17 11:40:26,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:40:26,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937109722] [2022-03-17 11:40:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:26,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:40:26,910 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:40:26,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137315935] [2022-03-17 11:40:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:26,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:40:26,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:40:26,915 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) [2022-03-17 11:40:26,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 11:40:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:40:26,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 11:40:26,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:40:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 11:40:27,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:40:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 11:40:27,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:40:27,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937109722] [2022-03-17 11:40:27,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:40:27,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137315935] [2022-03-17 11:40:27,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137315935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:40:27,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:40:27,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-17 11:40:27,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338527070] [2022-03-17 11:40:27,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:40:27,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 11:40:27,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:40:27,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 11:40:27,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-17 11:40:27,225 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 11:40:27,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:40:27,355 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2022-03-17 11:40:27,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 11:40:27,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2022-03-17 11:40:27,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:40:27,357 INFO L225 Difference]: With dead ends: 83 [2022-03-17 11:40:27,357 INFO L226 Difference]: Without dead ends: 76 [2022-03-17 11:40:27,358 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-03-17 11:40:27,359 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 52 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 11:40:27,359 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 169 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 11:40:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-17 11:40:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2022-03-17 11:40:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.320754716981132) internal successors, (70), 56 states have internal predecessors, (70), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 11:40:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-17 11:40:27,368 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 29 [2022-03-17 11:40:27,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:40:27,368 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-17 11:40:27,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 11:40:27,369 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-17 11:40:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 11:40:27,400 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:40:27,400 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:40:27,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-17 11:40:27,600 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 [2022-03-17 11:40:27,601 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:40:27,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:40:27,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2029937874, now seen corresponding path program 1 times [2022-03-17 11:40:27,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:40:27,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521469249] [2022-03-17 11:40:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:27,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:40:27,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:40:27,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828360777] [2022-03-17 11:40:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:27,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:40:27,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:40:27,618 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) [2022-03-17 11:40:27,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 11:40:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:40:27,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 11:40:27,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:40:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 11:40:27,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:40:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 11:40:28,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:40:28,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521469249] [2022-03-17 11:40:28,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:40:28,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828360777] [2022-03-17 11:40:28,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828360777] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 11:40:28,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 11:40:28,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 11:40:28,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51587889] [2022-03-17 11:40:28,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 11:40:28,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 11:40:28,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:40:28,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 11:40:28,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-17 11:40:28,219 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 11:40:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:40:28,261 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2022-03-17 11:40:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 11:40:28,262 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-03-17 11:40:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:40:28,264 INFO L225 Difference]: With dead ends: 97 [2022-03-17 11:40:28,264 INFO L226 Difference]: Without dead ends: 95 [2022-03-17 11:40:28,265 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-17 11:40:28,266 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 11:40:28,266 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 135 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-03-17 11:40:28,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-17 11:40:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-03-17 11:40:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 76 states have internal predecessors, (88), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 11:40:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2022-03-17 11:40:28,278 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 29 [2022-03-17 11:40:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:40:28,278 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2022-03-17 11:40:28,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 11:40:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2022-03-17 11:40:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 11:40:28,280 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:40:28,280 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, 1, 1, 1, 1] [2022-03-17 11:40:28,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 11:40:28,491 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 [2022-03-17 11:40:28,492 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:40:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:40:28,492 INFO L85 PathProgramCache]: Analyzing trace with hash 223058363, now seen corresponding path program 1 times [2022-03-17 11:40:28,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:40:28,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99471569] [2022-03-17 11:40:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:28,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:40:28,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:40:28,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98832349] [2022-03-17 11:40:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:28,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:40:28,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:40:28,506 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) [2022-03-17 11:40:28,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 11:40:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:40:28,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 11:40:28,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:40:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 11:40:28,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:40:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 11:40:28,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:40:28,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99471569] [2022-03-17 11:40:28,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:40:28,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98832349] [2022-03-17 11:40:28,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98832349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:40:28,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:40:28,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-17 11:40:28,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030730620] [2022-03-17 11:40:28,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:40:28,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 11:40:28,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:40:28,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 11:40:28,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-17 11:40:28,827 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 11:40:30,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 11:40:31,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:40:31,032 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2022-03-17 11:40:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 11:40:31,034 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-03-17 11:40:31,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:40:31,035 INFO L225 Difference]: With dead ends: 109 [2022-03-17 11:40:31,035 INFO L226 Difference]: Without dead ends: 92 [2022-03-17 11:40:31,036 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-17 11:40:31,037 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-17 11:40:31,039 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 99 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-17 11:40:31,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-17 11:40:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-17 11:40:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 74 states have internal predecessors, (85), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 11:40:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2022-03-17 11:40:31,048 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 35 [2022-03-17 11:40:31,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:40:31,048 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2022-03-17 11:40:31,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 11:40:31,049 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2022-03-17 11:40:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 11:40:31,050 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:40:31,050 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] [2022-03-17 11:40:31,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 11:40:31,267 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 [2022-03-17 11:40:31,268 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:40:31,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:40:31,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1731935178, now seen corresponding path program 1 times [2022-03-17 11:40:31,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:40:31,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934064824] [2022-03-17 11:40:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:31,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:40:31,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:40:31,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468797676] [2022-03-17 11:40:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:31,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:40:31,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:40:31,281 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) [2022-03-17 11:40:31,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 11:40:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:40:31,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 11:40:31,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:40:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 11:40:31,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 11:40:31,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:40:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934064824] [2022-03-17 11:40:31,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:40:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468797676] [2022-03-17 11:40:31,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468797676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 11:40:31,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 11:40:31,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 11:40:31,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174749156] [2022-03-17 11:40:31,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 11:40:31,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 11:40:31,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:40:31,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 11:40:31,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 11:40:31,400 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 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) [2022-03-17 11:40:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:40:31,422 INFO L93 Difference]: Finished difference Result 117 states and 137 transitions. [2022-03-17 11:40:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 11:40:31,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 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 35 [2022-03-17 11:40:31,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:40:31,424 INFO L225 Difference]: With dead ends: 117 [2022-03-17 11:40:31,424 INFO L226 Difference]: Without dead ends: 76 [2022-03-17 11:40:31,424 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 11:40:31,425 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 11:40:31,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 11:40:31,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-17 11:40:31,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-17 11:40:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.206896551724138) internal successors, (70), 61 states have internal predecessors, (70), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 11:40:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2022-03-17 11:40:31,434 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 35 [2022-03-17 11:40:31,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:40:31,434 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2022-03-17 11:40:31,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 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) [2022-03-17 11:40:31,434 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2022-03-17 11:40:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 11:40:31,435 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:40:31,436 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:40:31,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 11:40:31,655 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 [2022-03-17 11:40:31,656 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:40:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:40:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash -585153905, now seen corresponding path program 2 times [2022-03-17 11:40:31,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:40:31,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167404861] [2022-03-17 11:40:31,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:31,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:40:31,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:40:31,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494404010] [2022-03-17 11:40:31,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 11:40:31,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:40:31,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:40:31,688 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) [2022-03-17 11:40:31,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 11:40:31,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-17 11:40:31,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 11:40:31,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 11:40:31,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:40:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-17 11:40:31,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 11:40:31,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:40:31,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167404861] [2022-03-17 11:40:31,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:40:31,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494404010] [2022-03-17 11:40:31,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494404010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 11:40:31,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 11:40:31,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 11:40:31,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926704292] [2022-03-17 11:40:31,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 11:40:31,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 11:40:31,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:40:31,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 11:40:31,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 11:40:31,887 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 11:40:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:40:31,952 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2022-03-17 11:40:31,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 11:40:31,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-03-17 11:40:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:40:31,954 INFO L225 Difference]: With dead ends: 99 [2022-03-17 11:40:31,954 INFO L226 Difference]: Without dead ends: 96 [2022-03-17 11:40:31,954 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 11:40:31,955 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 11:40:31,955 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 11:40:31,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-17 11:40:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2022-03-17 11:40:31,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 60 states have internal predecessors, (71), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 11:40:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2022-03-17 11:40:31,964 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 37 [2022-03-17 11:40:31,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:40:31,964 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2022-03-17 11:40:31,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 11:40:31,964 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2022-03-17 11:40:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 11:40:31,965 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:40:31,965 INFO L500 BasicCegarLoop]: trace histogram [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, 1] [2022-03-17 11:40:31,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 11:40:32,189 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 [2022-03-17 11:40:32,190 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:40:32,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:40:32,190 INFO L85 PathProgramCache]: Analyzing trace with hash 817777954, now seen corresponding path program 1 times [2022-03-17 11:40:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:40:32,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060019124] [2022-03-17 11:40:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:32,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:40:32,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:40:32,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546713996] [2022-03-17 11:40:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:40:32,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:40:32,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:40:32,216 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) [2022-03-17 11:40:32,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process