/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/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-07 00:00:31,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-07 00:00:31,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-07 00:00:31,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-07 00:00:32,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-07 00:00:32,008 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-07 00:00:32,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-07 00:00:32,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-07 00:00:32,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-07 00:00:32,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-07 00:00:32,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-07 00:00:32,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-07 00:00:32,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-07 00:00:32,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-07 00:00:32,010 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-07 00:00:32,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-07 00:00:32,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-07 00:00:32,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-07 00:00:32,010 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-07 00:00:32,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-07 00:00:32,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:00:32,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-07 00:00:32,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-07 00:00:32,011 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-07 00:00:32,011 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-07 00:00:32,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-07 00:00:32,011 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-07 00:00:32,011 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-07 00:00:32,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-07 00:00:32,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-07 00:00:32,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-07 00:00:32,228 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-07 00:00:32,228 INFO L275 PluginConnector]: CDTParser initialized [2022-04-07 00:00:32,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound10.c [2022-04-07 00:00:32,274 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6730b62c/552bfe3ccb6a4e7b81d482198e0a8b5b/FLAGe2a3191c2 [2022-04-07 00:00:32,622 INFO L306 CDTParser]: Found 1 translation units. [2022-04-07 00:00:32,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound10.c [2022-04-07 00:00:32,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6730b62c/552bfe3ccb6a4e7b81d482198e0a8b5b/FLAGe2a3191c2 [2022-04-07 00:00:33,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6730b62c/552bfe3ccb6a4e7b81d482198e0a8b5b [2022-04-07 00:00:33,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-07 00:00:33,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-07 00:00:33,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-07 00:00:33,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-07 00:00:33,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-07 00:00:33,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:00:33" (1/1) ... [2022-04-07 00:00:33,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba39b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:00:33, skipping insertion in model container [2022-04-07 00:00:33,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:00:33" (1/1) ... [2022-04-07 00:00:33,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-07 00:00:33,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-07 00:00:33,212 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/mannadiv_unwindbound10.c[573,586] [2022-04-07 00:00:33,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:00:33,241 INFO L203 MainTranslator]: Completed pre-run [2022-04-07 00:00:33,250 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/mannadiv_unwindbound10.c[573,586] [2022-04-07 00:00:33,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:00:33,271 INFO L208 MainTranslator]: Completed translation [2022-04-07 00:00:33,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:00:33 WrapperNode [2022-04-07 00:00:33,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-07 00:00:33,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-07 00:00:33,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-07 00:00:33,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-07 00:00:33,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:00:33" (1/1) ... [2022-04-07 00:00:33,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:00:33" (1/1) ... [2022-04-07 00:00:33,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:00:33" (1/1) ... [2022-04-07 00:00:33,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:00:33" (1/1) ... [2022-04-07 00:00:33,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:00:33" (1/1) ... [2022-04-07 00:00:33,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:00:33" (1/1) ... [2022-04-07 00:00:33,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:00:33" (1/1) ... [2022-04-07 00:00:33,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-07 00:00:33,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-07 00:00:33,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-07 00:00:33,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-07 00:00:33,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:00:33" (1/1) ... [2022-04-07 00:00:33,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:00:33,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:33,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-07 00:00:33,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-07 00:00:33,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-07 00:00:33,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-07 00:00:33,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-07 00:00:33,351 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-07 00:00:33,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-07 00:00:33,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-07 00:00:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-07 00:00:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-07 00:00:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-07 00:00:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-07 00:00:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-07 00:00:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-07 00:00:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-07 00:00:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-07 00:00:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-07 00:00:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-07 00:00:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-07 00:00:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-07 00:00:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-07 00:00:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-07 00:00:33,401 INFO L234 CfgBuilder]: Building ICFG [2022-04-07 00:00:33,402 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-07 00:00:33,490 INFO L275 CfgBuilder]: Performing block encoding [2022-04-07 00:00:33,494 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-07 00:00:33,507 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-07 00:00:33,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:00:33 BoogieIcfgContainer [2022-04-07 00:00:33,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-07 00:00:33,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-07 00:00:33,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-07 00:00:33,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-07 00:00:33,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.04 12:00:33" (1/3) ... [2022-04-07 00:00:33,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147f027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:00:33, skipping insertion in model container [2022-04-07 00:00:33,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:00:33" (2/3) ... [2022-04-07 00:00:33,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147f027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:00:33, skipping insertion in model container [2022-04-07 00:00:33,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:00:33" (3/3) ... [2022-04-07 00:00:33,517 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound10.c [2022-04-07 00:00:33,520 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-07 00:00:33,520 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-07 00:00:33,562 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-07 00:00:33,566 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-07 00:00:33,566 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-07 00:00:33,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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) [2022-04-07 00:00:33,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-07 00:00:33,592 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:33,593 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:00:33,594 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:33,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-04-07 00:00:33,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:33,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [636598022] [2022-04-07 00:00:33,613 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 2 times [2022-04-07 00:00:33,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:33,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698153442] [2022-04-07 00:00:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:33,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:00:33,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:00:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:00:33,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:00:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:00:33,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-07 00:00:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:00:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:33,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:00:33,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698153442] [2022-04-07 00:00:33,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698153442] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:33,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:33,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-07 00:00:33,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:00:33,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [636598022] [2022-04-07 00:00:33,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [636598022] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:33,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:33,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-07 00:00:33,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211561691] [2022-04-07 00:00:33,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:00:33,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-07 00:00:33,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:33,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-07 00:00:33,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-07 00:00:33,792 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-07 00:00:33,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:00:33,873 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2022-04-07 00:00:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-07 00:00:33,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-07 00:00:33,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:00:33,886 INFO L225 Difference]: With dead ends: 54 [2022-04-07 00:00:33,886 INFO L226 Difference]: Without dead ends: 26 [2022-04-07 00:00:33,888 INFO L912 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 [2022-04-07 00:00:33,892 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:00:33,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 35 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-07 00:00:33,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-07 00:00:33,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-07 00:00:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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) [2022-04-07 00:00:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-04-07 00:00:33,926 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-04-07 00:00:33,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:00:33,926 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-04-07 00:00:33,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-07 00:00:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-04-07 00:00:33,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-07 00:00:33,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:33,928 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:00:33,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-07 00:00:33,929 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:33,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:33,931 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-04-07 00:00:33,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:33,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1730927579] [2022-04-07 00:00:33,935 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:33,935 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 2 times [2022-04-07 00:00:33,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:33,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749030664] [2022-04-07 00:00:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:33,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:33,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:00:33,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285451058] [2022-04-07 00:00:33,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:00:33,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:33,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:33,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:00:33,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-07 00:00:34,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-07 00:00:34,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:00:34,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-07 00:00:34,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:00:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:34,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 00:00:34,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:00:34,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749030664] [2022-04-07 00:00:34,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:00:34,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285451058] [2022-04-07 00:00:34,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285451058] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:34,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:34,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-07 00:00:34,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:00:34,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1730927579] [2022-04-07 00:00:34,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1730927579] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:34,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:34,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-07 00:00:34,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153178322] [2022-04-07 00:00:34,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:00:34,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-07 00:00:34,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:34,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-07 00:00:34,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-07 00:00:34,163 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-04-07 00:00:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:00:34,180 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-07 00:00:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-07 00:00:34,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 23 [2022-04-07 00:00:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:00:34,182 INFO L225 Difference]: With dead ends: 34 [2022-04-07 00:00:34,182 INFO L226 Difference]: Without dead ends: 27 [2022-04-07 00:00:34,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-07 00:00:34,183 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:00:34,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:00:34,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-07 00:00:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-07 00:00:34,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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) [2022-04-07 00:00:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-07 00:00:34,188 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-04-07 00:00:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:00:34,189 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-07 00:00:34,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-04-07 00:00:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-07 00:00:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-07 00:00:34,190 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:34,190 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:00:34,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-07 00:00:34,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:34,408 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-04-07 00:00:34,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:34,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1544658117] [2022-04-07 00:00:34,409 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:34,409 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 2 times [2022-04-07 00:00:34,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:34,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37681448] [2022-04-07 00:00:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:34,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:34,427 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:00:34,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781575666] [2022-04-07 00:00:34,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:00:34,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:34,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:34,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:00:34,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-07 00:00:34,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-07 00:00:34,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:00:34,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-07 00:00:34,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:00:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:34,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 00:00:34,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:00:34,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37681448] [2022-04-07 00:00:34,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:00:34,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781575666] [2022-04-07 00:00:34,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781575666] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:34,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:34,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:00:34,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:00:34,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1544658117] [2022-04-07 00:00:34,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1544658117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:34,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:34,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:00:34,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131389225] [2022-04-07 00:00:34,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:00:34,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:00:34,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:34,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:00:34,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-07 00:00:34,596 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:00:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:00:34,659 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-04-07 00:00:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-07 00:00:34,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-07 00:00:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:00:34,661 INFO L225 Difference]: With dead ends: 37 [2022-04-07 00:00:34,661 INFO L226 Difference]: Without dead ends: 35 [2022-04-07 00:00:34,662 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:00:34,668 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:00:34,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:00:34,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-07 00:00:34,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-04-07 00:00:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-07 00:00:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-04-07 00:00:34,697 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-04-07 00:00:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:00:34,697 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-04-07 00:00:34,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:00:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-04-07 00:00:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-07 00:00:34,698 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:34,698 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:00:34,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-07 00:00:34,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-07 00:00:34,914 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:34,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:34,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-04-07 00:00:34,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:34,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1601971532] [2022-04-07 00:00:34,915 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:34,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 2 times [2022-04-07 00:00:34,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:34,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869136891] [2022-04-07 00:00:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:34,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:34,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:00:34,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345691904] [2022-04-07 00:00:34,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:00:34,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:34,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:34,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:00:34,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-07 00:00:34,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:00:34,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:00:34,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-07 00:00:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:00:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:35,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:00:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:35,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:00:35,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869136891] [2022-04-07 00:00:35,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:00:35,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345691904] [2022-04-07 00:00:35,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345691904] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:00:35,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:00:35,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-07 00:00:35,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:00:35,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1601971532] [2022-04-07 00:00:35,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1601971532] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:35,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:35,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:00:35,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33773916] [2022-04-07 00:00:35,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:00:35,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:00:35,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:35,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:00:35,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:00:35,211 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:00:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:00:35,269 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-04-07 00:00:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:00:35,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-04-07 00:00:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:00:35,271 INFO L225 Difference]: With dead ends: 39 [2022-04-07 00:00:35,271 INFO L226 Difference]: Without dead ends: 34 [2022-04-07 00:00:35,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:00:35,272 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:00:35,272 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 103 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:00:35,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-07 00:00:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-04-07 00:00:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 00:00:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-04-07 00:00:35,276 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-04-07 00:00:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:00:35,277 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-04-07 00:00:35,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:00:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-04-07 00:00:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-07 00:00:35,277 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:35,277 INFO L499 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, 1, 1, 1] [2022-04-07 00:00:35,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-07 00:00:35,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:35,492 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:35,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:35,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-04-07 00:00:35,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:35,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015591910] [2022-04-07 00:00:35,492 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:35,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 2 times [2022-04-07 00:00:35,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:35,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092770512] [2022-04-07 00:00:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:35,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:35,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:00:35,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725682603] [2022-04-07 00:00:35,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:00:35,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:35,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:35,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:00:35,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-07 00:00:35,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:00:35,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:00:35,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-07 00:00:35,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:00:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:35,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:00:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:35,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:00:35,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092770512] [2022-04-07 00:00:35,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:00:35,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725682603] [2022-04-07 00:00:35,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725682603] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:00:35,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:00:35,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-07 00:00:35,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:00:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015591910] [2022-04-07 00:00:35,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015591910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:35,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:35,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:00:35,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337862260] [2022-04-07 00:00:35,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:00:35,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:00:35,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:00:35,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:00:35,715 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-07 00:00:35,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:00:35,736 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-04-07 00:00:35,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:00:35,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-04-07 00:00:35,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:00:35,738 INFO L225 Difference]: With dead ends: 43 [2022-04-07 00:00:35,738 INFO L226 Difference]: Without dead ends: 38 [2022-04-07 00:00:35,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:00:35,739 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:00:35,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 72 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:00:35,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-07 00:00:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-07 00:00:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-07 00:00:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-04-07 00:00:35,751 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2022-04-07 00:00:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:00:35,751 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-04-07 00:00:35,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-07 00:00:35,752 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-04-07 00:00:35,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-07 00:00:35,753 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:35,754 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:00:35,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-07 00:00:35,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:35,967 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:35,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:35,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 3 times [2022-04-07 00:00:35,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:35,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051345104] [2022-04-07 00:00:35,968 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:35,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 4 times [2022-04-07 00:00:35,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:35,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900198189] [2022-04-07 00:00:35,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:35,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:35,975 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:00:35,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696665416] [2022-04-07 00:00:35,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:00:35,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:35,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:35,977 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:00:35,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-07 00:00:36,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:00:36,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:00:36,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-07 00:00:36,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:00:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:36,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:00:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-07 00:00:36,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:00:36,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900198189] [2022-04-07 00:00:36,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:00:36,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696665416] [2022-04-07 00:00:36,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696665416] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:00:36,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:00:36,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-07 00:00:36,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:00:36,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051345104] [2022-04-07 00:00:36,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051345104] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:36,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:36,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:00:36,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301621272] [2022-04-07 00:00:36,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:00:36,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:00:36,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:36,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:00:36,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:00:36,204 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-07 00:00:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:00:36,244 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-04-07 00:00:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:00:36,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-04-07 00:00:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:00:36,245 INFO L225 Difference]: With dead ends: 52 [2022-04-07 00:00:36,245 INFO L226 Difference]: Without dead ends: 47 [2022-04-07 00:00:36,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:00:36,246 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:00:36,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 86 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:00:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-07 00:00:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-07 00:00:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-07 00:00:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-04-07 00:00:36,252 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2022-04-07 00:00:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:00:36,252 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-04-07 00:00:36,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-07 00:00:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-04-07 00:00:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-07 00:00:36,253 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:36,253 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:00:36,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-07 00:00:36,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:36,470 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:36,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:36,470 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 5 times [2022-04-07 00:00:36,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:36,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806852131] [2022-04-07 00:00:36,471 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:36,471 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 6 times [2022-04-07 00:00:36,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:36,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253007753] [2022-04-07 00:00:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:36,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:36,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:00:36,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733403813] [2022-04-07 00:00:36,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-07 00:00:36,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:36,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:36,480 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:00:36,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-07 00:00:36,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-07 00:00:36,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:00:36,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-07 00:00:36,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:00:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:36,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:00:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-07 00:00:36,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:00:36,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253007753] [2022-04-07 00:00:36,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:00:36,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733403813] [2022-04-07 00:00:36,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733403813] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:00:36,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:00:36,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-07 00:00:36,762 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:00:36,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806852131] [2022-04-07 00:00:36,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806852131] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:36,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:36,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:00:36,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917778244] [2022-04-07 00:00:36,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:00:36,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-07 00:00:36,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:36,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-07 00:00:36,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:00:36,763 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-07 00:00:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:00:36,802 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-04-07 00:00:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:00:36,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2022-04-07 00:00:36,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:00:36,803 INFO L225 Difference]: With dead ends: 61 [2022-04-07 00:00:36,803 INFO L226 Difference]: Without dead ends: 56 [2022-04-07 00:00:36,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:00:36,803 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:00:36,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 88 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:00:36,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-07 00:00:36,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-07 00:00:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-07 00:00:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-04-07 00:00:36,809 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2022-04-07 00:00:36,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:00:36,809 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-04-07 00:00:36,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-07 00:00:36,810 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-04-07 00:00:36,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-07 00:00:36,810 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:36,810 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:00:36,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-07 00:00:37,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:37,027 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:37,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:37,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 7 times [2022-04-07 00:00:37,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:37,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335540548] [2022-04-07 00:00:37,028 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:37,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 8 times [2022-04-07 00:00:37,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:37,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665229391] [2022-04-07 00:00:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:37,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:37,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:00:37,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654621514] [2022-04-07 00:00:37,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:00:37,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:37,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:37,039 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:00:37,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-07 00:00:37,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:00:37,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:00:37,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-07 00:00:37,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:00:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:37,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:00:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-07 00:00:37,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:00:37,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665229391] [2022-04-07 00:00:37,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:00:37,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654621514] [2022-04-07 00:00:37,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654621514] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:00:37,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:00:37,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-07 00:00:37,391 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:00:37,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [335540548] [2022-04-07 00:00:37,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [335540548] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:37,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:37,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:00:37,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853668894] [2022-04-07 00:00:37,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:00:37,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:00:37,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:37,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:00:37,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:00:37,392 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-04-07 00:00:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:00:37,469 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-04-07 00:00:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:00:37,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-04-07 00:00:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:00:37,472 INFO L225 Difference]: With dead ends: 70 [2022-04-07 00:00:37,472 INFO L226 Difference]: Without dead ends: 65 [2022-04-07 00:00:37,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:00:37,474 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 25 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:00:37,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 102 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:00:37,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-07 00:00:37,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-04-07 00:00:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-07 00:00:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-04-07 00:00:37,493 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2022-04-07 00:00:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:00:37,493 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-04-07 00:00:37,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-04-07 00:00:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-04-07 00:00:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-07 00:00:37,495 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:37,495 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:00:37,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-07 00:00:37,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:37,708 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:37,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:37,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 9 times [2022-04-07 00:00:37,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:37,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [535219865] [2022-04-07 00:00:37,709 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:37,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 10 times [2022-04-07 00:00:37,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:37,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861484961] [2022-04-07 00:00:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:37,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:37,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:00:37,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149282228] [2022-04-07 00:00:37,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:00:37,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:37,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:37,740 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:00:37,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-07 00:00:37,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:00:37,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:00:37,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-07 00:00:37,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:00:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:37,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:00:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-07 00:00:38,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:00:38,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861484961] [2022-04-07 00:00:38,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:00:38,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149282228] [2022-04-07 00:00:38,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149282228] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:00:38,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:00:38,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-07 00:00:38,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:00:38,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [535219865] [2022-04-07 00:00:38,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [535219865] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:38,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:38,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:00:38,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258782606] [2022-04-07 00:00:38,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:00:38,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:00:38,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:38,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:00:38,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:00:38,044 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-07 00:00:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:00:38,107 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-04-07 00:00:38,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-07 00:00:38,108 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2022-04-07 00:00:38,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:00:38,108 INFO L225 Difference]: With dead ends: 79 [2022-04-07 00:00:38,108 INFO L226 Difference]: Without dead ends: 74 [2022-04-07 00:00:38,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:00:38,109 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:00:38,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 122 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:00:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-07 00:00:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-04-07 00:00:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-07 00:00:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2022-04-07 00:00:38,135 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2022-04-07 00:00:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:00:38,135 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2022-04-07 00:00:38,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-07 00:00:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2022-04-07 00:00:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-07 00:00:38,136 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:38,136 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:00:38,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-07 00:00:38,351 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 [2022-04-07 00:00:38,351 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:38,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:38,352 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 11 times [2022-04-07 00:00:38,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:38,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2022062918] [2022-04-07 00:00:38,352 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:38,352 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 12 times [2022-04-07 00:00:38,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:38,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97901790] [2022-04-07 00:00:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:38,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:38,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:00:38,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263657354] [2022-04-07 00:00:38,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-07 00:00:38,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:38,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:38,367 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) [2022-04-07 00:00:38,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-07 00:00:38,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-07 00:00:38,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:00:38,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-07 00:00:38,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:00:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:38,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:00:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-07 00:00:38,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:00:38,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97901790] [2022-04-07 00:00:38,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:00:38,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263657354] [2022-04-07 00:00:38,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263657354] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:00:38,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:00:38,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-04-07 00:00:38,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:00:38,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2022062918] [2022-04-07 00:00:38,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2022062918] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:38,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:38,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:00:38,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118470004] [2022-04-07 00:00:38,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:00:38,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:00:38,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:38,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:00:38,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:00:38,694 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-04-07 00:00:38,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:00:38,763 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-04-07 00:00:38,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-07 00:00:38,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2022-04-07 00:00:38,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:00:38,764 INFO L225 Difference]: With dead ends: 88 [2022-04-07 00:00:38,764 INFO L226 Difference]: Without dead ends: 83 [2022-04-07 00:00:38,764 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:00:38,765 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:00:38,765 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 124 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:00:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-07 00:00:38,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-04-07 00:00:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-07 00:00:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-04-07 00:00:38,772 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2022-04-07 00:00:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:00:38,772 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-04-07 00:00:38,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-04-07 00:00:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-04-07 00:00:38,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-07 00:00:38,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:38,773 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:00:38,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-07 00:00:38,989 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 [2022-04-07 00:00:38,989 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:38,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:38,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 13 times [2022-04-07 00:00:38,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:38,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [613979895] [2022-04-07 00:00:38,990 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:38,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 14 times [2022-04-07 00:00:38,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:38,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134053769] [2022-04-07 00:00:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:38,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:39,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:00:39,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210365713] [2022-04-07 00:00:39,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:00:39,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:39,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:39,013 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) [2022-04-07 00:00:39,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-07 00:00:39,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:00:39,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:00:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-07 00:00:39,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:00:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:39,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:00:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-07 00:00:39,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:00:39,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134053769] [2022-04-07 00:00:39,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:00:39,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210365713] [2022-04-07 00:00:39,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210365713] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:00:39,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:00:39,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-04-07 00:00:39,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:00:39,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [613979895] [2022-04-07 00:00:39,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [613979895] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:39,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:39,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:00:39,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109771515] [2022-04-07 00:00:39,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:00:39,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-07 00:00:39,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:39,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-07 00:00:39,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:00:39,364 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-07 00:00:39,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:00:39,447 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-04-07 00:00:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-07 00:00:39,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2022-04-07 00:00:39,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:00:39,448 INFO L225 Difference]: With dead ends: 97 [2022-04-07 00:00:39,448 INFO L226 Difference]: Without dead ends: 92 [2022-04-07 00:00:39,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:00:39,449 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 22 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:00:39,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 138 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:00:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-07 00:00:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-04-07 00:00:39,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-07 00:00:39,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2022-04-07 00:00:39,456 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2022-04-07 00:00:39,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:00:39,456 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2022-04-07 00:00:39,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-07 00:00:39,456 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2022-04-07 00:00:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-07 00:00:39,457 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:39,457 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:00:39,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-07 00:00:39,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-07 00:00:39,673 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:39,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:39,673 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 15 times [2022-04-07 00:00:39,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:39,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [245786282] [2022-04-07 00:00:39,674 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 16 times [2022-04-07 00:00:39,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:39,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734436412] [2022-04-07 00:00:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:39,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:39,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:00:39,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068856772] [2022-04-07 00:00:39,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:00:39,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:39,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:39,689 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:00:39,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-07 00:00:39,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:00:39,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:00:39,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-07 00:00:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:00:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:40,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:00:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-07 00:00:40,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:00:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734436412] [2022-04-07 00:00:40,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:00:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068856772] [2022-04-07 00:00:40,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068856772] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:00:40,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:00:40,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2022-04-07 00:00:40,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:00:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [245786282] [2022-04-07 00:00:40,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [245786282] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:40,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:40,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:00:40,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271878170] [2022-04-07 00:00:40,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:00:40,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:00:40,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:40,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:00:40,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:00:40,350 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-04-07 00:00:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:00:40,434 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-04-07 00:00:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-07 00:00:40,434 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2022-04-07 00:00:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:00:40,435 INFO L225 Difference]: With dead ends: 106 [2022-04-07 00:00:40,435 INFO L226 Difference]: Without dead ends: 101 [2022-04-07 00:00:40,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2022-04-07 00:00:40,436 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:00:40,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 140 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:00:40,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-07 00:00:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-04-07 00:00:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-07 00:00:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-04-07 00:00:40,443 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2022-04-07 00:00:40,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:00:40,443 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-04-07 00:00:40,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-04-07 00:00:40,443 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-04-07 00:00:40,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-07 00:00:40,444 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:40,444 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:00:40,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-07 00:00:40,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-07 00:00:40,660 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 17 times [2022-04-07 00:00:40,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:40,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [847275475] [2022-04-07 00:00:40,660 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 18 times [2022-04-07 00:00:40,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:40,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395971444] [2022-04-07 00:00:40,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:40,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:40,668 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:00:40,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580496766] [2022-04-07 00:00:40,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-07 00:00:40,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:40,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:40,669 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:00:40,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-07 00:00:40,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-07 00:00:40,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:00:40,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-07 00:00:40,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:00:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:00:40,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:00:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 198 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-07 00:00:41,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:00:41,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395971444] [2022-04-07 00:00:41,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:00:41,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580496766] [2022-04-07 00:00:41,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580496766] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:00:41,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:00:41,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-04-07 00:00:41,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:00:41,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [847275475] [2022-04-07 00:00:41,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [847275475] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:00:41,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:00:41,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:00:41,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780487681] [2022-04-07 00:00:41,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:00:41,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:00:41,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:41,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:00:41,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:00:41,075 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-07 00:00:41,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:00:41,172 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-04-07 00:00:41,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-07 00:00:41,173 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2022-04-07 00:00:41,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:00:41,174 INFO L225 Difference]: With dead ends: 115 [2022-04-07 00:00:41,174 INFO L226 Difference]: Without dead ends: 110 [2022-04-07 00:00:41,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2022-04-07 00:00:41,174 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:00:41,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 160 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:00:41,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-07 00:00:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-04-07 00:00:41,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-07 00:00:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-04-07 00:00:41,181 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2022-04-07 00:00:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:00:41,182 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-04-07 00:00:41,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-07 00:00:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-04-07 00:00:41,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-07 00:00:41,182 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:00:41,182 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:00:41,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-07 00:00:41,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-07 00:00:41,395 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:00:41,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:00:41,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 19 times [2022-04-07 00:00:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:00:41,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [781094061] [2022-04-07 00:00:41,396 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:00:41,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 20 times [2022-04-07 00:00:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:00:41,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129959319] [2022-04-07 00:00:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:00:41,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:00:41,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:00:41,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291012509] [2022-04-07 00:00:41,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:00:41,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:00:41,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:00:41,408 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:00:41,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-07 00:00:41,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:00:41,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-07 00:00:41,476 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-07 00:00:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-07 00:00:41,570 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-07 00:00:41,570 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-07 00:00:41,570 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-07 00:00:41,572 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-07 00:00:41,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-07 00:00:41,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-07 00:00:41,793 INFO L719 BasicCegarLoop]: Path program histogram: [20, 2, 2, 2, 2] [2022-04-07 00:00:41,795 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-07 00:00:41,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.04 12:00:41 BoogieIcfgContainer [2022-04-07 00:00:41,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-07 00:00:41,809 INFO L158 Benchmark]: Toolchain (without parser) took 8762.94ms. Allocated memory was 186.6MB in the beginning and 224.4MB in the end (delta: 37.7MB). Free memory was 136.6MB in the beginning and 195.0MB in the end (delta: -58.4MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-07 00:00:41,809 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 186.6MB. Free memory is still 153.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-07 00:00:41,809 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.57ms. Allocated memory is still 186.6MB. Free memory was 136.4MB in the beginning and 162.6MB in the end (delta: -26.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-07 00:00:41,809 INFO L158 Benchmark]: Boogie Preprocessor took 25.92ms. Allocated memory is still 186.6MB. Free memory was 162.6MB in the beginning and 161.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-07 00:00:41,809 INFO L158 Benchmark]: RCFGBuilder took 210.48ms. Allocated memory is still 186.6MB. Free memory was 161.1MB in the beginning and 151.4MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-07 00:00:41,809 INFO L158 Benchmark]: TraceAbstraction took 8298.20ms. Allocated memory was 186.6MB in the beginning and 224.4MB in the end (delta: 37.7MB). Free memory was 150.8MB in the beginning and 195.0MB in the end (delta: -44.2MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-07 00:00:41,810 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 186.6MB. Free memory is still 153.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 224.57ms. Allocated memory is still 186.6MB. Free memory was 136.4MB in the beginning and 162.6MB in the end (delta: -26.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.92ms. Allocated memory is still 186.6MB. Free memory was 162.6MB in the beginning and 161.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 210.48ms. Allocated memory is still 186.6MB. Free memory was 161.1MB in the beginning and 151.4MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 8298.20ms. Allocated memory was 186.6MB in the beginning and 224.4MB in the end (delta: 37.7MB). Free memory was 150.8MB in the beginning and 195.0MB in the end (delta: -44.2MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) [L13] COND FALSE !(!cond) [L29] RET assume_abort_if_not(x1 >= 0) [L30] CALL assume_abort_if_not(x2 != 0) [L13] COND FALSE !(!cond) [L30] RET assume_abort_if_not(x2 != 0) [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 [L36] EXPR counter++ [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND FALSE !(counter++<10) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) [L16] COND TRUE !(cond) [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.2s, OverallIterations: 14, TraceHistogramMax: 11, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 194 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 191 mSDsluCounter, 1320 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 939 mSDsCounter, 109 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 399 IncrementalHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 109 mSolverCounterUnsat, 381 mSDtfsCounter, 399 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1375 GetRequests, 1211 SyntacticMatches, 6 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=13, InterpolantAutomatonStates: 146, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-07 00:00:41,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...