/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/cohencu-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:43:16,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:43:16,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:43:16,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:43:16,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:43:16,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:43:16,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:43:16,274 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 21:43:16,284 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:43:16,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:43:16,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:43:16,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:43:16,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:43:16,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:43:16,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:43:16,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:43:16,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:43:16,286 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:43:16,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:43:16,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:43:16,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:43:16,287 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:43:16,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:43:16,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:43:16,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:43:16,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:43:16,287 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:43:16,287 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:43:16,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:43:16,287 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:43:16,287 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:43:16,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:43:16,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:43:16,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:43:16,443 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:43:16,444 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:43:16,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound20.c [2022-04-06 21:43:16,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/095d6f885/4ed93ce3fe8f4c3e9944044723213056/FLAG635e5de60 [2022-04-06 21:43:16,876 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:43:16,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound20.c [2022-04-06 21:43:16,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/095d6f885/4ed93ce3fe8f4c3e9944044723213056/FLAG635e5de60 [2022-04-06 21:43:16,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/095d6f885/4ed93ce3fe8f4c3e9944044723213056 [2022-04-06 21:43:16,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:43:16,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:43:16,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:43:16,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:43:16,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:43:16,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:43:16" (1/1) ... [2022-04-06 21:43:16,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f8565a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:16, skipping insertion in model container [2022-04-06 21:43:16,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:43:16" (1/1) ... [2022-04-06 21:43:16,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:43:16,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:43:17,029 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/cohencu-ll_valuebound20.c[588,601] [2022-04-06 21:43:17,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:43:17,047 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:43:17,054 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/cohencu-ll_valuebound20.c[588,601] [2022-04-06 21:43:17,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:43:17,068 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:43:17,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:17 WrapperNode [2022-04-06 21:43:17,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:43:17,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:43:17,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:43:17,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:43:17,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:17" (1/1) ... [2022-04-06 21:43:17,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:17" (1/1) ... [2022-04-06 21:43:17,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:17" (1/1) ... [2022-04-06 21:43:17,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:17" (1/1) ... [2022-04-06 21:43:17,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:17" (1/1) ... [2022-04-06 21:43:17,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:17" (1/1) ... [2022-04-06 21:43:17,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:17" (1/1) ... [2022-04-06 21:43:17,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:43:17,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:43:17,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:43:17,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:43:17,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:17" (1/1) ... [2022-04-06 21:43:17,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:43:17,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:17,126 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) [2022-04-06 21:43:17,132 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 [2022-04-06 21:43:17,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:43:17,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:43:17,153 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:43:17,153 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 21:43:17,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 21:43:17,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:43:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 21:43:17,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:43:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:43:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:43:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-04-06 21:43:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 21:43:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 21:43:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:43:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:43:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:43:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:43:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:43:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:43:17,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:43:17,192 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:43:17,193 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:43:17,278 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:43:17,282 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:43:17,282 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 21:43:17,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:43:17 BoogieIcfgContainer [2022-04-06 21:43:17,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:43:17,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:43:17,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:43:17,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:43:17,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:43:16" (1/3) ... [2022-04-06 21:43:17,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250e9624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:43:17, skipping insertion in model container [2022-04-06 21:43:17,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:17" (2/3) ... [2022-04-06 21:43:17,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250e9624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:43:17, skipping insertion in model container [2022-04-06 21:43:17,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:43:17" (3/3) ... [2022-04-06 21:43:17,303 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound20.c [2022-04-06 21:43:17,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:43:17,306 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:43:17,341 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:43:17,352 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 [2022-04-06 21:43:17,352 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:43:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 21:43:17,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 21:43:17,377 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:17,378 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:17,378 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 1 times [2022-04-06 21:43:17,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:17,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1758372537] [2022-04-06 21:43:17,396 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:43:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 2 times [2022-04-06 21:43:17,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:17,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517280956] [2022-04-06 21:43:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:17,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:43:17,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:43:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:43:17,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:43:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:43:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:43:17,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:17,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517280956] [2022-04-06 21:43:17,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517280956] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:17,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:17,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:43:17,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:17,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1758372537] [2022-04-06 21:43:17,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1758372537] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:17,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:17,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:43:17,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097619761] [2022-04-06 21:43:17,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:17,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 21:43:17,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:17,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 21:43:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:43:17,639 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 21:43:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:17,735 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2022-04-06 21:43:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 21:43:17,737 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 21:43:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:17,742 INFO L225 Difference]: With dead ends: 63 [2022-04-06 21:43:17,742 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 21:43:17,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:43:17,749 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:17,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:43:17,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 21:43:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-06 21:43:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:43:17,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-04-06 21:43:17,784 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-04-06 21:43:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:17,785 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-04-06 21:43:17,785 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 21:43:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-04-06 21:43:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 21:43:17,785 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:17,786 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:17,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:43:17,786 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:17,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 1 times [2022-04-06 21:43:17,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:17,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1655462743] [2022-04-06 21:43:17,795 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:43:17,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 2 times [2022-04-06 21:43:17,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:17,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83653838] [2022-04-06 21:43:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:17,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:43:17,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:43:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:43:17,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:43:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:43:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:43:17,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:17,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83653838] [2022-04-06 21:43:17,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83653838] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:17,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:17,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:43:17,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:17,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1655462743] [2022-04-06 21:43:17,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1655462743] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:17,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:17,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:43:17,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20535405] [2022-04-06 21:43:17,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:17,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:43:17,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:17,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:43:17,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:43:17,903 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 21:43:18,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:18,015 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-04-06 21:43:18,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:43:18,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 21:43:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:18,016 INFO L225 Difference]: With dead ends: 37 [2022-04-06 21:43:18,016 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 21:43:18,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:43:18,017 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:18,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:43:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 21:43:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 21:43:18,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:43:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-06 21:43:18,026 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-04-06 21:43:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:18,027 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-06 21:43:18,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 21:43:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-06 21:43:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 21:43:18,027 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:18,027 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:18,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 21:43:18,028 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:18,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 1 times [2022-04-06 21:43:18,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:18,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1874743223] [2022-04-06 21:43:18,035 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:43:18,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 2 times [2022-04-06 21:43:18,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:18,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794755672] [2022-04-06 21:43:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:18,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:18,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:18,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3774976] [2022-04-06 21:43:18,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:43:18,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:18,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:18,047 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) [2022-04-06 21:43:18,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 21:43:18,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:43:18,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:18,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:43:18,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:43:18,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:43:18,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:18,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794755672] [2022-04-06 21:43:18,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:18,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3774976] [2022-04-06 21:43:18,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3774976] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:18,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:18,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:43:18,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:18,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1874743223] [2022-04-06 21:43:18,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1874743223] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:18,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:18,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:43:18,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731895105] [2022-04-06 21:43:18,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:18,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:43:18,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:18,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:43:18,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:43:18,170 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:43:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:18,232 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-04-06 21:43:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:43:18,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 21:43:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:18,233 INFO L225 Difference]: With dead ends: 54 [2022-04-06 21:43:18,234 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 21:43:18,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:43:18,235 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:18,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 148 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:43:18,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 21:43:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-04-06 21:43:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 21:43:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-04-06 21:43:18,246 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-04-06 21:43:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:18,246 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-04-06 21:43:18,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:43:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-04-06 21:43:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 21:43:18,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:18,247 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:18,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:18,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:18,448 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:18,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:18,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 1 times [2022-04-06 21:43:18,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:18,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [26407351] [2022-04-06 21:43:18,449 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:43:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 2 times [2022-04-06 21:43:18,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:18,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406868572] [2022-04-06 21:43:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:18,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:18,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:18,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342351667] [2022-04-06 21:43:18,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:43:18,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:18,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:18,460 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) [2022-04-06 21:43:18,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 21:43:18,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:43:18,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:18,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:43:18,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:43:18,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:43:18,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:18,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406868572] [2022-04-06 21:43:18,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:18,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342351667] [2022-04-06 21:43:18,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342351667] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:18,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:18,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:43:18,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:18,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [26407351] [2022-04-06 21:43:18,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [26407351] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:18,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:18,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:43:18,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157083192] [2022-04-06 21:43:18,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:18,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:43:18,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:18,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:43:18,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:43:18,591 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:43:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:18,636 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-04-06 21:43:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:43:18,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-04-06 21:43:18,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:18,637 INFO L225 Difference]: With dead ends: 58 [2022-04-06 21:43:18,637 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 21:43:18,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:43:18,638 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:18,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 149 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:43:18,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 21:43:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-04-06 21:43:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 21:43:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-04-06 21:43:18,647 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-04-06 21:43:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:18,647 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-04-06 21:43:18,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:43:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-04-06 21:43:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 21:43:18,648 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:18,648 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:18,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:18,864 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,SelfDestructingSolverStorable3 [2022-04-06 21:43:18,864 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:18,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:18,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 1 times [2022-04-06 21:43:18,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:18,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1863379109] [2022-04-06 21:43:18,865 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:43:18,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 2 times [2022-04-06 21:43:18,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:18,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381499598] [2022-04-06 21:43:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:18,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:18,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:18,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351432046] [2022-04-06 21:43:18,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:43:18,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:18,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:18,877 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) [2022-04-06 21:43:18,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 21:43:18,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:43:18,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:18,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 21:43:18,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:43:19,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:43:19,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:19,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381499598] [2022-04-06 21:43:19,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:19,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351432046] [2022-04-06 21:43:19,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351432046] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:19,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:19,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:43:19,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:19,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1863379109] [2022-04-06 21:43:19,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1863379109] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:19,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:19,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:43:19,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837142697] [2022-04-06 21:43:19,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:19,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:43:19,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:19,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:43:19,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:43:19,024 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 21:43:19,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:19,075 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2022-04-06 21:43:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:43:19,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-06 21:43:19,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:19,077 INFO L225 Difference]: With dead ends: 66 [2022-04-06 21:43:19,077 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 21:43:19,077 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:43:19,078 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:19,078 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 135 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:43:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 21:43:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-06 21:43:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 21:43:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-04-06 21:43:19,085 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-04-06 21:43:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:19,085 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-04-06 21:43:19,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 21:43:19,085 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-04-06 21:43:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:43:19,086 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:19,086 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-04-06 21:43:19,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:19,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:19,302 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:19,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1002403483, now seen corresponding path program 1 times [2022-04-06 21:43:19,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:19,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1768188728] [2022-04-06 21:43:19,319 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:43:19,319 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:43:19,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1002403483, now seen corresponding path program 2 times [2022-04-06 21:43:19,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:19,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104176171] [2022-04-06 21:43:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:19,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:19,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:19,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848720043] [2022-04-06 21:43:19,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:43:19,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:19,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:19,328 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) [2022-04-06 21:43:19,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 21:43:19,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:43:19,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:19,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 21:43:19,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 21:43:19,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:43:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 21:43:19,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:19,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104176171] [2022-04-06 21:43:19,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:19,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848720043] [2022-04-06 21:43:19,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848720043] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:43:19,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:43:19,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 21:43:19,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1768188728] [2022-04-06 21:43:19,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1768188728] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:19,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:19,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:43:19,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570990821] [2022-04-06 21:43:19,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:19,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:43:19,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:19,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:43:19,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:43:19,657 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 21:43:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:19,744 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2022-04-06 21:43:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:43:19,744 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2022-04-06 21:43:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:19,749 INFO L225 Difference]: With dead ends: 81 [2022-04-06 21:43:19,749 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 21:43:19,750 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:43:19,751 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 6 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:19,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 180 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:43:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 21:43:19,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-04-06 21:43:19,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 37 states have (on average 1.054054054054054) internal successors, (39), 39 states have internal predecessors, (39), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 21:43:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2022-04-06 21:43:19,770 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 49 [2022-04-06 21:43:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:19,770 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2022-04-06 21:43:19,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 21:43:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2022-04-06 21:43:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 21:43:19,771 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:19,771 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:19,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:19,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:19,972 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:19,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 3 times [2022-04-06 21:43:19,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:19,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [914086381] [2022-04-06 21:43:19,981 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:43:19,981 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:43:19,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 4 times [2022-04-06 21:43:19,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:19,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735822204] [2022-04-06 21:43:19,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:19,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:20,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:20,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325624009] [2022-04-06 21:43:20,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:43:20,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:20,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:20,011 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) [2022-04-06 21:43:20,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 21:43:20,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:43:20,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:20,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 21:43:20,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 21:43:20,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:43:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 21:43:20,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:20,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735822204] [2022-04-06 21:43:20,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:20,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325624009] [2022-04-06 21:43:20,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325624009] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:43:20,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:43:20,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 21:43:20,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:20,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [914086381] [2022-04-06 21:43:20,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [914086381] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:20,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:20,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:43:20,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642348464] [2022-04-06 21:43:20,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:20,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:43:20,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:20,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:43:20,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:43:20,329 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 21:43:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:20,409 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2022-04-06 21:43:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:43:20,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-04-06 21:43:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:20,411 INFO L225 Difference]: With dead ends: 85 [2022-04-06 21:43:20,411 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 21:43:20,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:43:20,412 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:20,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 196 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:43:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 21:43:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2022-04-06 21:43:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 40 states have (on average 1.05) internal successors, (42), 42 states have internal predecessors, (42), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 21:43:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2022-04-06 21:43:20,428 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 54 [2022-04-06 21:43:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:20,428 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2022-04-06 21:43:20,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 21:43:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2022-04-06 21:43:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:43:20,434 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:20,434 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:20,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:20,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:20,652 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:20,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:20,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1546120389, now seen corresponding path program 5 times [2022-04-06 21:43:20,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:20,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [107912182] [2022-04-06 21:43:20,659 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:43:20,659 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:43:20,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1546120389, now seen corresponding path program 6 times [2022-04-06 21:43:20,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:20,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446500285] [2022-04-06 21:43:20,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:20,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:20,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:20,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654635033] [2022-04-06 21:43:20,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:43:20,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:20,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:20,682 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) [2022-04-06 21:43:20,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 21:43:20,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:43:20,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:20,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 21:43:20,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 21:43:20,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:43:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 21:43:25,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:25,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446500285] [2022-04-06 21:43:25,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:25,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654635033] [2022-04-06 21:43:25,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654635033] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:43:25,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:43:25,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 21:43:25,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:25,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [107912182] [2022-04-06 21:43:25,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [107912182] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:25,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:25,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:43:25,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531531825] [2022-04-06 21:43:25,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:25,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:43:25,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:25,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:43:25,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:43:25,511 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 21:43:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:25,644 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2022-04-06 21:43:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:43:25,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2022-04-06 21:43:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:25,645 INFO L225 Difference]: With dead ends: 89 [2022-04-06 21:43:25,645 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 21:43:25,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:43:25,646 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:25,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 167 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:43:25,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 21:43:25,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-04-06 21:43:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 46 states have internal predecessors, (47), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:43:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-04-06 21:43:25,654 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 59 [2022-04-06 21:43:25,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:25,654 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-04-06 21:43:25,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 21:43:25,654 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-04-06 21:43:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 21:43:25,654 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:25,655 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:25,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:25,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:25,873 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:25,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:25,874 INFO L85 PathProgramCache]: Analyzing trace with hash -310331719, now seen corresponding path program 1 times [2022-04-06 21:43:25,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:25,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1840790738] [2022-04-06 21:43:25,878 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:43:25,878 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:43:25,878 INFO L85 PathProgramCache]: Analyzing trace with hash -310331719, now seen corresponding path program 2 times [2022-04-06 21:43:25,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:25,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775464311] [2022-04-06 21:43:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:25,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:25,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:25,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392147304] [2022-04-06 21:43:25,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:43:25,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:25,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:25,885 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) [2022-04-06 21:43:25,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 21:43:25,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:43:25,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:25,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 21:43:25,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 21:43:26,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:43:26,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:26,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775464311] [2022-04-06 21:43:26,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:26,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392147304] [2022-04-06 21:43:26,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392147304] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:43:26,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:43:26,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 21:43:26,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:26,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1840790738] [2022-04-06 21:43:26,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1840790738] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:26,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:26,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:43:26,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614083873] [2022-04-06 21:43:26,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:26,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:43:26,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:26,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:43:26,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:43:26,325 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 21:43:26,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:26,451 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2022-04-06 21:43:26,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:43:26,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2022-04-06 21:43:26,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:26,454 INFO L225 Difference]: With dead ends: 94 [2022-04-06 21:43:26,455 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 21:43:26,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:43:26,456 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:26,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 186 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:43:26,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 21:43:26,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-04-06 21:43:26,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.06) internal successors, (53), 52 states have internal predecessors, (53), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:43:26,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2022-04-06 21:43:26,471 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 75 [2022-04-06 21:43:26,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:26,472 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2022-04-06 21:43:26,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 21:43:26,472 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2022-04-06 21:43:26,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 21:43:26,473 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:26,473 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:26,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:26,689 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:26,689 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:26,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:26,690 INFO L85 PathProgramCache]: Analyzing trace with hash -63758730, now seen corresponding path program 7 times [2022-04-06 21:43:26,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:26,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1943189329] [2022-04-06 21:43:26,694 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:43:26,694 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:43:26,694 INFO L85 PathProgramCache]: Analyzing trace with hash -63758730, now seen corresponding path program 8 times [2022-04-06 21:43:26,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:26,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958177214] [2022-04-06 21:43:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:26,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:26,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:26,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62577988] [2022-04-06 21:43:26,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:43:26,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:26,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:26,709 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) [2022-04-06 21:43:26,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 21:43:26,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:43:26,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:26,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 21:43:26,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 48 proven. 17 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 21:43:26,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:43:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 48 proven. 17 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 21:43:27,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:27,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958177214] [2022-04-06 21:43:27,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:27,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62577988] [2022-04-06 21:43:27,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62577988] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:43:27,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:43:27,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-04-06 21:43:27,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:27,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1943189329] [2022-04-06 21:43:27,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1943189329] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:27,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:27,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:43:27,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509579944] [2022-04-06 21:43:27,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:27,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:43:27,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:27,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:43:27,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:43:27,602 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 21:43:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:27,887 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2022-04-06 21:43:27,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:43:27,887 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2022-04-06 21:43:27,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:27,888 INFO L225 Difference]: With dead ends: 115 [2022-04-06 21:43:27,888 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 21:43:27,889 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:43:27,889 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:27,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 135 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:43:27,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 21:43:27,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2022-04-06 21:43:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 60 states have internal predecessors, (60), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 21:43:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2022-04-06 21:43:27,898 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 76 [2022-04-06 21:43:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:27,898 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2022-04-06 21:43:27,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 21:43:27,898 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2022-04-06 21:43:27,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 21:43:27,899 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:27,900 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:27,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:28,100 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,SelfDestructingSolverStorable9 [2022-04-06 21:43:28,101 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:28,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1701746168, now seen corresponding path program 1 times [2022-04-06 21:43:28,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:28,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1100783158] [2022-04-06 21:43:28,105 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:43:28,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:43:28,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1701746168, now seen corresponding path program 2 times [2022-04-06 21:43:28,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:28,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638493638] [2022-04-06 21:43:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:28,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:28,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:28,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212321609] [2022-04-06 21:43:28,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:43:28,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:28,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:28,132 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) [2022-04-06 21:43:28,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 21:43:28,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:43:28,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:28,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 21:43:28,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 21:43:28,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:43:28,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:28,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638493638] [2022-04-06 21:43:28,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:28,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212321609] [2022-04-06 21:43:28,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212321609] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:43:28,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:43:28,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 21:43:28,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:28,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1100783158] [2022-04-06 21:43:28,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1100783158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:28,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:28,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:43:28,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786348356] [2022-04-06 21:43:28,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:28,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:43:28,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:28,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:43:28,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:43:28,684 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 21:43:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:28,782 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2022-04-06 21:43:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:43:28,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 80 [2022-04-06 21:43:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:28,783 INFO L225 Difference]: With dead ends: 109 [2022-04-06 21:43:28,784 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 21:43:28,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:43:28,784 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 6 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:28,784 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 216 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:43:28,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 21:43:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-04-06 21:43:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.037037037037037) internal successors, (56), 56 states have internal predecessors, (56), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:43:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2022-04-06 21:43:28,792 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 80 [2022-04-06 21:43:28,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:28,792 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2022-04-06 21:43:28,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 21:43:28,792 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2022-04-06 21:43:28,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 21:43:28,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:28,792 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:28,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:29,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:29,007 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:29,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1156119141, now seen corresponding path program 9 times [2022-04-06 21:43:29,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:29,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [50563606] [2022-04-06 21:43:29,012 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:43:29,012 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:43:29,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1156119141, now seen corresponding path program 10 times [2022-04-06 21:43:29,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:29,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862610357] [2022-04-06 21:43:29,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:29,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:29,020 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:29,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086739976] [2022-04-06 21:43:29,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:43:29,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:29,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:29,025 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) [2022-04-06 21:43:29,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 21:43:29,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:43:29,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:29,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 21:43:29,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 21:43:29,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:43:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 21:43:29,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:29,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862610357] [2022-04-06 21:43:29,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:29,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086739976] [2022-04-06 21:43:29,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086739976] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:43:29,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:43:29,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 21:43:29,427 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:29,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [50563606] [2022-04-06 21:43:29,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [50563606] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:29,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:29,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:43:29,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134779057] [2022-04-06 21:43:29,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:29,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:43:29,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:29,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:43:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:43:29,428 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 21:43:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:29,703 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-04-06 21:43:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:43:29,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 81 [2022-04-06 21:43:29,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:29,704 INFO L225 Difference]: With dead ends: 112 [2022-04-06 21:43:29,704 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 21:43:29,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:43:29,705 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 6 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:29,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 222 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:43:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 21:43:29,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2022-04-06 21:43:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 59 states have internal predecessors, (59), 27 states have call successors, (27), 17 states have call predecessors, (27), 16 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 21:43:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-04-06 21:43:29,713 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2022-04-06 21:43:29,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:29,713 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-04-06 21:43:29,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 21:43:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-04-06 21:43:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 21:43:29,714 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:29,714 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:29,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:29,930 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,SelfDestructingSolverStorable11 [2022-04-06 21:43:29,930 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1087104342, now seen corresponding path program 11 times [2022-04-06 21:43:29,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:29,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051127464] [2022-04-06 21:43:29,934 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:43:29,934 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:43:29,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1087104342, now seen corresponding path program 12 times [2022-04-06 21:43:29,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:29,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15920590] [2022-04-06 21:43:29,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:29,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:29,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:29,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189223346] [2022-04-06 21:43:29,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:43:29,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:29,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:29,940 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) [2022-04-06 21:43:29,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 21:43:30,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:43:30,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:30,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 21:43:30,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 52 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 21:43:30,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:43:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-04-06 21:43:30,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:30,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15920590] [2022-04-06 21:43:30,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:30,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189223346] [2022-04-06 21:43:30,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189223346] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:43:30,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:43:30,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-04-06 21:43:30,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:30,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051127464] [2022-04-06 21:43:30,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051127464] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:30,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:30,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:43:30,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385086748] [2022-04-06 21:43:30,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:30,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:43:30,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:30,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:43:30,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:43:30,685 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 21:43:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:30,954 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2022-04-06 21:43:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:43:30,954 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 86 [2022-04-06 21:43:30,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:30,955 INFO L225 Difference]: With dead ends: 116 [2022-04-06 21:43:30,955 INFO L226 Difference]: Without dead ends: 111 [2022-04-06 21:43:30,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:43:30,956 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:30,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 134 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:43:30,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-06 21:43:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-04-06 21:43:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 21:43:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2022-04-06 21:43:30,964 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 86 [2022-04-06 21:43:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:30,964 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2022-04-06 21:43:30,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 21:43:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2022-04-06 21:43:30,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 21:43:30,965 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:30,965 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:30,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:31,181 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,SelfDestructingSolverStorable12 [2022-04-06 21:43:31,181 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:31,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:31,182 INFO L85 PathProgramCache]: Analyzing trace with hash 511374036, now seen corresponding path program 3 times [2022-04-06 21:43:31,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:31,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [115375386] [2022-04-06 21:43:31,185 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:43:31,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:43:31,185 INFO L85 PathProgramCache]: Analyzing trace with hash 511374036, now seen corresponding path program 4 times [2022-04-06 21:43:31,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:31,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581088627] [2022-04-06 21:43:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:31,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:31,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:31,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246772438] [2022-04-06 21:43:31,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:43:31,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:31,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:31,192 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) [2022-04-06 21:43:31,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 21:43:31,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:43:31,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:31,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 21:43:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 21:43:31,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:43:31,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:31,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581088627] [2022-04-06 21:43:31,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:31,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246772438] [2022-04-06 21:43:31,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246772438] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:43:31,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:43:31,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 21:43:31,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:31,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [115375386] [2022-04-06 21:43:31,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [115375386] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:31,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:31,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:43:31,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090407027] [2022-04-06 21:43:31,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:31,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:43:31,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:31,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:43:31,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:43:31,694 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 21:43:31,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:31,834 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2022-04-06 21:43:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:43:31,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2022-04-06 21:43:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:31,835 INFO L225 Difference]: With dead ends: 117 [2022-04-06 21:43:31,835 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 21:43:31,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:43:31,836 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 6 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:31,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 225 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:43:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 21:43:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-04-06 21:43:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.046875) internal successors, (67), 66 states have internal predecessors, (67), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 21:43:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2022-04-06 21:43:31,844 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 102 [2022-04-06 21:43:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:31,844 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2022-04-06 21:43:31,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 21:43:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2022-04-06 21:43:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 21:43:31,845 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:31,845 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:31,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:32,063 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,SelfDestructingSolverStorable13 [2022-04-06 21:43:32,064 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:32,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:32,064 INFO L85 PathProgramCache]: Analyzing trace with hash -360684101, now seen corresponding path program 13 times [2022-04-06 21:43:32,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:32,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [464141880] [2022-04-06 21:43:32,067 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:43:32,067 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:43:32,067 INFO L85 PathProgramCache]: Analyzing trace with hash -360684101, now seen corresponding path program 14 times [2022-04-06 21:43:32,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:32,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505083061] [2022-04-06 21:43:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:32,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:32,091 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:32,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768515885] [2022-04-06 21:43:32,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:43:32,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:32,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:32,092 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) [2022-04-06 21:43:32,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 21:43:32,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:43:32,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:32,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 21:43:32,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 21:43:32,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:43:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 21:43:32,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:32,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505083061] [2022-04-06 21:43:32,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:32,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768515885] [2022-04-06 21:43:32,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768515885] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:43:32,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:43:32,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 21:43:32,565 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:32,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [464141880] [2022-04-06 21:43:32,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [464141880] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:32,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:32,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:43:32,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410464613] [2022-04-06 21:43:32,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:32,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:43:32,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:43:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:43:32,567 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 21:43:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:32,749 INFO L93 Difference]: Finished difference Result 142 states and 163 transitions. [2022-04-06 21:43:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:43:32,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 103 [2022-04-06 21:43:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:32,750 INFO L225 Difference]: With dead ends: 142 [2022-04-06 21:43:32,750 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 21:43:32,750 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:43:32,750 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 7 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:32,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 270 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:43:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 21:43:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2022-04-06 21:43:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 77 states have internal predecessors, (77), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 21:43:32,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2022-04-06 21:43:32,760 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 103 [2022-04-06 21:43:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:32,760 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2022-04-06 21:43:32,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 21:43:32,760 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2022-04-06 21:43:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 21:43:32,761 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:32,761 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:32,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:32,977 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,SelfDestructingSolverStorable14 [2022-04-06 21:43:32,977 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:32,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:32,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1368175293, now seen corresponding path program 3 times [2022-04-06 21:43:32,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:32,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [445420725] [2022-04-06 21:43:32,981 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:43:32,981 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:43:32,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1368175293, now seen corresponding path program 4 times [2022-04-06 21:43:32,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:32,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003447919] [2022-04-06 21:43:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:32,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:32,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:32,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253500701] [2022-04-06 21:43:32,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:43:32,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:32,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:32,987 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:43:32,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 21:43:33,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:43:33,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:33,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 21:43:33,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 21:43:33,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:43:33,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:33,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003447919] [2022-04-06 21:43:33,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:33,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253500701] [2022-04-06 21:43:33,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253500701] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:43:33,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:43:33,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 21:43:33,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:33,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [445420725] [2022-04-06 21:43:33,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [445420725] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:33,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:33,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:43:33,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050200155] [2022-04-06 21:43:33,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:33,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:43:33,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:33,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:43:33,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:43:33,509 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 21:43:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:33,663 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2022-04-06 21:43:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:43:33,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2022-04-06 21:43:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:33,664 INFO L225 Difference]: With dead ends: 136 [2022-04-06 21:43:33,664 INFO L226 Difference]: Without dead ends: 123 [2022-04-06 21:43:33,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:43:33,665 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:33,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 234 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:43:33,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-06 21:43:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-04-06 21:43:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 71 states have (on average 1.028169014084507) internal successors, (73), 73 states have internal predecessors, (73), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 21:43:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2022-04-06 21:43:33,694 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 107 [2022-04-06 21:43:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:33,694 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2022-04-06 21:43:33,694 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 21:43:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2022-04-06 21:43:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-06 21:43:33,695 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:33,695 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:33,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:33,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:33,911 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1388085622, now seen corresponding path program 15 times [2022-04-06 21:43:33,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:33,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1580367442] [2022-04-06 21:43:33,915 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:43:33,915 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:43:33,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1388085622, now seen corresponding path program 16 times [2022-04-06 21:43:33,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:33,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255515945] [2022-04-06 21:43:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:33,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:33,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:33,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160719207] [2022-04-06 21:43:33,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:43:33,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:33,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:33,932 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:43:33,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 21:43:33,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:43:33,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:33,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 21:43:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 34 proven. 33 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 21:43:34,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:43:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 34 proven. 33 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 21:43:34,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:43:34,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255515945] [2022-04-06 21:43:34,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:43:34,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160719207] [2022-04-06 21:43:34,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160719207] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:43:34,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:43:34,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 21:43:34,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:43:34,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1580367442] [2022-04-06 21:43:34,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1580367442] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:43:34,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:43:34,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:43:34,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549585612] [2022-04-06 21:43:34,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:43:34,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:43:34,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:34,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:43:34,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:43:34,466 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 21:43:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:43:34,765 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2022-04-06 21:43:34,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:43:34,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2022-04-06 21:43:34,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:43:34,766 INFO L225 Difference]: With dead ends: 139 [2022-04-06 21:43:34,766 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 21:43:34,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:43:34,767 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 6 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:43:34,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 259 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:43:34,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 21:43:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 128. [2022-04-06 21:43:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 74 states have (on average 1.027027027027027) internal successors, (76), 76 states have internal predecessors, (76), 32 states have call successors, (32), 22 states have call predecessors, (32), 21 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:43:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2022-04-06 21:43:34,775 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 108 [2022-04-06 21:43:34,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:43:34,776 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2022-04-06 21:43:34,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 21:43:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2022-04-06 21:43:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 21:43:34,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:43:34,776 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:43:34,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 21:43:34,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 21:43:34,999 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:43:35,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:43:35,000 INFO L85 PathProgramCache]: Analyzing trace with hash 34642523, now seen corresponding path program 17 times [2022-04-06 21:43:35,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:43:35,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1481687049] [2022-04-06 21:43:35,003 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:43:35,003 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:43:35,003 INFO L85 PathProgramCache]: Analyzing trace with hash 34642523, now seen corresponding path program 18 times [2022-04-06 21:43:35,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:43:35,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310147109] [2022-04-06 21:43:35,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:43:35,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:43:35,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:43:35,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986908307] [2022-04-06 21:43:35,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:43:35,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:43:35,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:43:35,009 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:43:35,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 21:43:35,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:43:35,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:43:35,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 21:43:35,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:43:45,880 WARN L833 $PredicateComparison]: unable to prove that (or (and (exists ((aux_div_v_main_~z~0_BEFORE_CALL_228_35 Int)) (not (let ((.cse0 (* 3 aux_div_v_main_~z~0_BEFORE_CALL_228_35 aux_div_v_main_~z~0_BEFORE_CALL_228_35))) (= (+ (* 6 (* aux_div_v_main_~z~0_BEFORE_CALL_228_35 (+ (* (- 3) aux_div_v_main_~z~0_BEFORE_CALL_228_35) .cse0 1))) (* 12 aux_div_v_main_~z~0_BEFORE_CALL_228_35)) (+ (* 18 (let ((.cse1 (div (+ (* 6 aux_div_v_main_~z~0_BEFORE_CALL_228_35) (- 6)) 6))) (* .cse1 .cse1 .cse1))) (* (- 36) aux_div_v_main_~z~0_BEFORE_CALL_228_35) (* 12 .cse0) 18))))) (<= 0 |c___VERIFIER_assert_#in~cond|)) (<= 1 |c___VERIFIER_assert_#in~cond|)) is different from false [2022-04-06 21:43:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 179 proven. 9 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-04-06 21:43:53,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 179 proven. 9 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-04-06 21:44:00,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:00,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310147109] [2022-04-06 21:44:00,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:00,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986908307] [2022-04-06 21:44:00,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986908307] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:44:00,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:44:00,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2022-04-06 21:44:00,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:00,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1481687049] [2022-04-06 21:44:00,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1481687049] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:00,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:00,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:44:00,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281676940] [2022-04-06 21:44:00,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:00,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:44:00,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:00,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:44:00,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=143, Unknown=2, NotChecked=24, Total=210 [2022-04-06 21:44:00,462 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 21:44:02,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:44:04,794 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:44:06,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:44:08,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:44:11,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:44:13,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:44:15,389 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:44:17,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:44:19,393 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:44:21,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:44:23,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:44:25,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:44:27,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:44:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:27,431 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2022-04-06 21:44:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:44:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-04-06 21:44:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:27,434 INFO L225 Difference]: With dead ends: 136 [2022-04-06 21:44:27,434 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 21:44:27,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 212 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=63, Invalid=211, Unknown=2, NotChecked=30, Total=306 [2022-04-06 21:44:27,434 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 42 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 26.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:27,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 95 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 109 Invalid, 12 Unknown, 39 Unchecked, 26.6s Time] [2022-04-06 21:44:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 21:44:27,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-04-06 21:44:27,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 80 states have internal predecessors, (81), 32 states have call successors, (32), 24 states have call predecessors, (32), 22 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:44:27,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2022-04-06 21:44:27,448 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 113 [2022-04-06 21:44:27,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:27,448 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2022-04-06 21:44:27,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 21:44:27,448 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2022-04-06 21:44:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 21:44:27,449 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:27,449 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:27,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 21:44:27,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 21:44:27,650 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:27,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:27,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2063139367, now seen corresponding path program 5 times [2022-04-06 21:44:27,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:27,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015273608] [2022-04-06 21:44:27,654 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:27,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:27,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2063139367, now seen corresponding path program 6 times [2022-04-06 21:44:27,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:27,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98930206] [2022-04-06 21:44:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:27,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:27,659 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:27,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888608639] [2022-04-06 21:44:27,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:44:27,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:27,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:27,660 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:44:27,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 21:44:27,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:44:27,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:27,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 21:44:28,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-04-06 21:44:28,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:28,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:28,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98930206] [2022-04-06 21:44:28,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:28,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888608639] [2022-04-06 21:44:28,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888608639] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:44:28,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:44:28,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 21:44:28,502 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:28,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015273608] [2022-04-06 21:44:28,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015273608] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:28,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:28,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:44:28,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895344563] [2022-04-06 21:44:28,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:28,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:44:28,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:28,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:44:28,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:44:28,503 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 21:44:29,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:29,024 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2022-04-06 21:44:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:44:29,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 129 [2022-04-06 21:44:29,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:29,025 INFO L225 Difference]: With dead ends: 140 [2022-04-06 21:44:29,025 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 21:44:29,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:44:29,026 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:29,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 103 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:44:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 21:44:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-04-06 21:44:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 82 states have (on average 1.024390243902439) internal successors, (84), 83 states have internal predecessors, (84), 32 states have call successors, (32), 25 states have call predecessors, (32), 23 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:44:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2022-04-06 21:44:29,039 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 129 [2022-04-06 21:44:29,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:29,040 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2022-04-06 21:44:29,040 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 21:44:29,040 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2022-04-06 21:44:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 21:44:29,042 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:29,042 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:29,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 21:44:29,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:29,247 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:29,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:29,248 INFO L85 PathProgramCache]: Analyzing trace with hash -262683944, now seen corresponding path program 5 times [2022-04-06 21:44:29,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:29,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1013992601] [2022-04-06 21:44:29,251 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:29,251 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:29,251 INFO L85 PathProgramCache]: Analyzing trace with hash -262683944, now seen corresponding path program 6 times [2022-04-06 21:44:29,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:29,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936335174] [2022-04-06 21:44:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:29,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:29,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:29,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711760161] [2022-04-06 21:44:29,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:44:29,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:29,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:29,266 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:44:29,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 21:44:29,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:44:29,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:29,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 21:44:29,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 181 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 21:44:36,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 148 proven. 39 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2022-04-06 21:44:41,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:41,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936335174] [2022-04-06 21:44:41,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:41,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711760161] [2022-04-06 21:44:41,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711760161] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:44:41,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:44:41,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 21:44:41,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:41,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1013992601] [2022-04-06 21:44:41,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1013992601] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:41,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:41,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:44:41,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398102295] [2022-04-06 21:44:41,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:41,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:44:41,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:44:41,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:44:41,226 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2022-04-06 21:44:43,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:43,216 INFO L93 Difference]: Finished difference Result 144 states and 151 transitions. [2022-04-06 21:44:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:44:43,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 134 [2022-04-06 21:44:43,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:43,217 INFO L225 Difference]: With dead ends: 144 [2022-04-06 21:44:43,217 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 21:44:43,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 249 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:44:43,219 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:43,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 109 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 21:44:43,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 21:44:43,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2022-04-06 21:44:43,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 85 states have internal predecessors, (85), 32 states have call successors, (32), 25 states have call predecessors, (32), 24 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:44:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 147 transitions. [2022-04-06 21:44:43,244 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 147 transitions. Word has length 134 [2022-04-06 21:44:43,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:43,245 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 147 transitions. [2022-04-06 21:44:43,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2022-04-06 21:44:43,245 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 147 transitions. [2022-04-06 21:44:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 21:44:43,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:43,247 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:43,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 21:44:43,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:43,452 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:43,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:43,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1923910469, now seen corresponding path program 19 times [2022-04-06 21:44:43,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:43,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [743244609] [2022-04-06 21:44:43,456 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:43,456 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:43,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1923910469, now seen corresponding path program 20 times [2022-04-06 21:44:43,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:43,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136845803] [2022-04-06 21:44:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:43,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:43,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:43,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771318014] [2022-04-06 21:44:43,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:44:43,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:43,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:43,465 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:44:43,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 21:44:43,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:44:43,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:43,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 21:44:43,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 44 proven. 58 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-06 21:44:43,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 44 proven. 58 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-06 21:44:44,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:44,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136845803] [2022-04-06 21:44:44,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:44,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771318014] [2022-04-06 21:44:44,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771318014] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:44:44,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:44:44,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 21:44:44,191 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:44,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [743244609] [2022-04-06 21:44:44,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [743244609] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:44,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:44,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:44:44,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53644417] [2022-04-06 21:44:44,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:44,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:44:44,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:44,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:44:44,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:44:44,193 INFO L87 Difference]: Start difference. First operand 140 states and 147 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-04-06 21:44:44,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:44,771 INFO L93 Difference]: Finished difference Result 180 states and 202 transitions. [2022-04-06 21:44:44,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:44:44,771 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 135 [2022-04-06 21:44:44,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:44,772 INFO L225 Difference]: With dead ends: 180 [2022-04-06 21:44:44,772 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 21:44:44,773 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:44:44,773 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 7 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:44,773 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 301 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:44:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 21:44:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 163. [2022-04-06 21:44:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 99 states have internal predecessors, (99), 37 states have call successors, (37), 29 states have call predecessors, (37), 28 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 21:44:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 171 transitions. [2022-04-06 21:44:44,789 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 171 transitions. Word has length 135 [2022-04-06 21:44:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:44,789 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 171 transitions. [2022-04-06 21:44:44,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-04-06 21:44:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 171 transitions. [2022-04-06 21:44:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-04-06 21:44:44,790 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:44,790 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:44,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-04-06 21:44:45,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:45,007 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:45,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:45,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1219256746, now seen corresponding path program 21 times [2022-04-06 21:44:45,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:45,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [180461177] [2022-04-06 21:44:45,011 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:45,011 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1219256746, now seen corresponding path program 22 times [2022-04-06 21:44:45,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:45,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714725905] [2022-04-06 21:44:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:45,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:45,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:45,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987862514] [2022-04-06 21:44:45,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:44:45,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:45,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:45,018 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:44:45,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 21:44:45,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:44:45,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:45,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 21:44:45,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 54 proven. 90 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-04-06 21:44:45,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 54 proven. 90 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-04-06 21:44:45,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:45,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714725905] [2022-04-06 21:44:45,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:45,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987862514] [2022-04-06 21:44:45,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987862514] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:44:45,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:44:45,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 21:44:45,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:45,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [180461177] [2022-04-06 21:44:45,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [180461177] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:45,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:45,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:44:45,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445872156] [2022-04-06 21:44:45,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:45,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:44:45,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:45,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:44:45,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:44:45,945 INFO L87 Difference]: Start difference. First operand 163 states and 171 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2022-04-06 21:44:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:46,985 INFO L93 Difference]: Finished difference Result 195 states and 220 transitions. [2022-04-06 21:44:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:44:46,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 162 [2022-04-06 21:44:46,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:46,986 INFO L225 Difference]: With dead ends: 195 [2022-04-06 21:44:46,986 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 21:44:46,987 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 308 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:44:46,988 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 7 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:46,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 360 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 21:44:46,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 21:44:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 178. [2022-04-06 21:44:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 107 states have internal predecessors, (108), 42 states have call successors, (42), 31 states have call predecessors, (42), 30 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 21:44:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 190 transitions. [2022-04-06 21:44:47,005 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 190 transitions. Word has length 162 [2022-04-06 21:44:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:47,005 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 190 transitions. [2022-04-06 21:44:47,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2022-04-06 21:44:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 190 transitions. [2022-04-06 21:44:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-04-06 21:44:47,006 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:47,006 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:47,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 21:44:47,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 21:44:47,222 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:47,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1267842796, now seen corresponding path program 1 times [2022-04-06 21:44:47,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:47,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [430297616] [2022-04-06 21:44:47,226 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:47,226 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:47,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1267842796, now seen corresponding path program 2 times [2022-04-06 21:44:47,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:47,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040322142] [2022-04-06 21:44:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:47,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:47,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:47,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025013537] [2022-04-06 21:44:47,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:44:47,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:47,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:47,233 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:44:47,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 21:44:47,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:44:47,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:47,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 21:44:47,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:47,847 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:44:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 275 proven. 76 refuted. 0 times theorem prover too weak. 1287 trivial. 0 not checked. [2022-04-06 21:44:47,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:48,798 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:45:30,731 WARN L232 SmtUtils]: Spent 31.61s on a formula simplification. DAG size of input: 65 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 21:45:34,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:45:34,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040322142] [2022-04-06 21:45:34,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:45:34,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025013537] [2022-04-06 21:45:34,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025013537] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:45:34,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:45:34,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 21:45:34,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:45:34,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [430297616] [2022-04-06 21:45:34,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [430297616] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:45:34,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:45:34,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:45:34,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838032512] [2022-04-06 21:45:34,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:45:34,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:45:34,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:45:34,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:45:34,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=258, Unknown=1, NotChecked=0, Total=342 [2022-04-06 21:45:34,924 INFO L87 Difference]: Start difference. First operand 178 states and 190 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 8 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) [2022-04-06 21:45:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:45:35,454 INFO L93 Difference]: Finished difference Result 198 states and 212 transitions. [2022-04-06 21:45:35,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:45:35,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 8 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) Word has length 166 [2022-04-06 21:45:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:45:35,455 INFO L225 Difference]: With dead ends: 198 [2022-04-06 21:45:35,455 INFO L226 Difference]: Without dead ends: 186 [2022-04-06 21:45:35,456 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=96, Invalid=323, Unknown=1, NotChecked=0, Total=420 [2022-04-06 21:45:35,456 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 14 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:45:35,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 187 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:45:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-06 21:45:35,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-04-06 21:45:35,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 111 states have (on average 1.018018018018018) internal successors, (113), 113 states have internal predecessors, (113), 42 states have call successors, (42), 33 states have call predecessors, (42), 32 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 21:45:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 195 transitions. [2022-04-06 21:45:35,478 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 195 transitions. Word has length 166 [2022-04-06 21:45:35,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:45:35,500 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 195 transitions. [2022-04-06 21:45:35,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 8 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) [2022-04-06 21:45:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 195 transitions. [2022-04-06 21:45:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 21:45:35,501 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:45:35,501 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:45:35,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 21:45:35,718 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 21:45:35,719 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:45:35,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:45:35,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1777251365, now seen corresponding path program 23 times [2022-04-06 21:45:35,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:45:35,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1665169804] [2022-04-06 21:45:35,723 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:45:35,723 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:45:35,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1777251365, now seen corresponding path program 24 times [2022-04-06 21:45:35,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:45:35,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504264036] [2022-04-06 21:45:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:45:35,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:45:35,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:45:35,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823369660] [2022-04-06 21:45:35,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:45:35,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:45:35,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:45:35,730 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:45:35,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 21:45:35,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:45:35,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:45:35,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 21:45:35,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:45:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 430 proven. 4 refuted. 0 times theorem prover too weak. 1743 trivial. 0 not checked. [2022-04-06 21:45:36,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:45:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 353 proven. 6 refuted. 0 times theorem prover too weak. 1818 trivial. 0 not checked. [2022-04-06 21:45:45,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:45:45,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504264036] [2022-04-06 21:45:45,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:45:45,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823369660] [2022-04-06 21:45:45,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823369660] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:45:45,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:45:45,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2022-04-06 21:45:45,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:45:45,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1665169804] [2022-04-06 21:45:45,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1665169804] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:45:45,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:45:45,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:45:45,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788729346] [2022-04-06 21:45:45,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:45:45,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:45:45,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:45:45,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:45:45,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:45:45,689 INFO L87 Difference]: Start difference. First operand 186 states and 195 transitions. Second operand has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 21:45:47,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:49,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:51,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:45:52,071 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2022-04-06 21:45:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:45:52,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 189 [2022-04-06 21:45:52,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:45:52,071 INFO L225 Difference]: With dead ends: 190 [2022-04-06 21:45:52,071 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 21:45:52,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 362 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:45:52,072 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:45:52,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 110 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 132 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-04-06 21:45:52,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 21:45:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 21:45:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 21:45:52,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 21:45:52,073 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 189 [2022-04-06 21:45:52,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:45:52,073 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 21:45:52,073 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 21:45:52,073 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 21:45:52,073 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 21:45:52,075 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 21:45:52,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 21:45:52,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:45:52,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 21:46:13,403 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-06 21:46:13,403 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-06 21:46:13,403 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-06 21:46:13,403 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-04-06 21:46:13,403 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-06 21:46:13,403 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 21:46:13,403 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 21:46:13,404 INFO L878 garLoopResultBuilder]: At program point L33-2(lines 33 46) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 20) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:46:13,404 INFO L878 garLoopResultBuilder]: At program point L33-3(lines 33 46) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (<= main_~a~0 20) (= main_~x~0 (* .cse1 .cse1 .cse1)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 (<= 0 main_~a~0) (<= .cse1 (+ main_~a~0 1)) (< main_~a~0 .cse1))))) [2022-04-06 21:46:13,404 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 56) the Hoare annotation is: true [2022-04-06 21:46:13,404 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse1 (+ main_~z~0 main_~x~0)) (.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (and .cse0 (= main_~x~0 1) (= (+ main_~y~0 6) .cse1) (= main_~y~0 (+ main_~x~0 6))) (and (= (+ main_~x~0 10) main_~z~0) .cse0 (= (+ 7 main_~y~0) .cse1) (= main_~x~0 8)) (let ((.cse2 (div (+ main_~z~0 (- 6)) 6))) (and (<= main_~a~0 20) (= main_~x~0 (* .cse2 .cse2 .cse2)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 (<= 0 main_~a~0) (<= .cse2 (+ main_~a~0 1)) (< main_~a~0 .cse2))))) [2022-04-06 21:46:13,404 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse1 (+ main_~z~0 main_~x~0)) (.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (and .cse0 (= main_~x~0 1) (= (+ main_~y~0 6) .cse1) (= main_~y~0 (+ main_~x~0 6))) (and (= (+ main_~x~0 10) main_~z~0) .cse0 (= (+ 7 main_~y~0) .cse1) (= main_~x~0 8)) (let ((.cse2 (div (+ main_~z~0 (- 6)) 6))) (and (<= main_~a~0 20) (= main_~x~0 (* .cse2 .cse2 .cse2)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 (<= 0 main_~a~0) (<= .cse2 (+ main_~a~0 1)) (< main_~a~0 .cse2))))) [2022-04-06 21:46:13,404 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (<= main_~a~0 20) (= main_~x~0 (* .cse1 .cse1 .cse1)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 (<= 0 main_~a~0) (<= .cse1 (+ main_~a~0 1)) (< main_~a~0 .cse1))))) [2022-04-06 21:46:13,404 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 56) the Hoare annotation is: true [2022-04-06 21:46:13,404 INFO L878 garLoopResultBuilder]: At program point L38(lines 33 46) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 20) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:46:13,404 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 20) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:46:13,404 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 20) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:46:13,404 INFO L878 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 20) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:46:13,404 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 56) the Hoare annotation is: true [2022-04-06 21:46:13,404 INFO L885 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2022-04-06 21:46:13,404 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (<= main_~a~0 20) (<= 0 main_~a~0)) [2022-04-06 21:46:13,404 INFO L885 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: true [2022-04-06 21:46:13,404 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse1 (+ main_~z~0 main_~x~0)) (.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (and .cse0 (= main_~x~0 1) (= (+ main_~y~0 6) .cse1) (= main_~y~0 (+ main_~x~0 6))) (and (= (+ main_~x~0 10) main_~z~0) .cse0 (= (+ 7 main_~y~0) .cse1) (= main_~x~0 8)) (let ((.cse2 (div (+ main_~z~0 (- 6)) 6))) (and (<= main_~a~0 20) (= main_~x~0 (* .cse2 .cse2 .cse2)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 (<= 0 main_~a~0) (<= .cse2 (+ main_~a~0 1)) (< main_~a~0 .cse2))))) [2022-04-06 21:46:13,405 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (<= main_~a~0 20) (= main_~x~0 (* .cse1 .cse1 .cse1)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 (<= 0 main_~a~0) (<= .cse1 (+ main_~a~0 1)) (< main_~a~0 .cse1))))) [2022-04-06 21:46:13,405 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 20) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:46:13,405 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 20) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:46:13,405 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:46:13,405 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 21:46:13,405 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:46:13,405 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:46:13,405 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 21:46:13,405 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 21:46:13,405 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:46:13,405 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 21:46:13,405 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (and (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))) [2022-04-06 21:46:13,405 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 21:46:13,405 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (and (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))) [2022-04-06 21:46:13,405 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (and (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))) [2022-04-06 21:46:13,405 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 21:46:13,407 INFO L719 BasicCegarLoop]: Path program histogram: [24, 6, 6, 2, 2, 2, 2, 2, 2] [2022-04-06 21:46:13,408 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 21:46:13,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:46:13 BoogieIcfgContainer [2022-04-06 21:46:13,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 21:46:13,417 INFO L158 Benchmark]: Toolchain (without parser) took 176527.05ms. Allocated memory was 180.4MB in the beginning and 478.2MB in the end (delta: 297.8MB). Free memory was 123.9MB in the beginning and 409.4MB in the end (delta: -285.6MB). Peak memory consumption was 269.5MB. Max. memory is 8.0GB. [2022-04-06 21:46:13,417 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 180.4MB. Free memory is still 140.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 21:46:13,418 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.91ms. Allocated memory was 180.4MB in the beginning and 275.8MB in the end (delta: 95.4MB). Free memory was 123.7MB in the beginning and 246.6MB in the end (delta: -122.9MB). Peak memory consumption was 8.2MB. Max. memory is 8.0GB. [2022-04-06 21:46:13,418 INFO L158 Benchmark]: Boogie Preprocessor took 26.76ms. Allocated memory is still 275.8MB. Free memory was 246.6MB in the beginning and 245.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 21:46:13,418 INFO L158 Benchmark]: RCFGBuilder took 187.45ms. Allocated memory is still 275.8MB. Free memory was 245.1MB in the beginning and 233.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 21:46:13,418 INFO L158 Benchmark]: TraceAbstraction took 176132.36ms. Allocated memory was 275.8MB in the beginning and 478.2MB in the end (delta: 202.4MB). Free memory was 233.0MB in the beginning and 409.4MB in the end (delta: -176.4MB). Peak memory consumption was 283.4MB. Max. memory is 8.0GB. [2022-04-06 21:46:13,419 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 180.4MB. Free memory is still 140.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 175.91ms. Allocated memory was 180.4MB in the beginning and 275.8MB in the end (delta: 95.4MB). Free memory was 123.7MB in the beginning and 246.6MB in the end (delta: -122.9MB). Peak memory consumption was 8.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.76ms. Allocated memory is still 275.8MB. Free memory was 246.6MB in the beginning and 245.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 187.45ms. Allocated memory is still 275.8MB. Free memory was 245.1MB in the beginning and 233.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 176132.36ms. Allocated memory was 275.8MB in the beginning and 478.2MB in the end (delta: 202.4MB). Free memory was 233.0MB in the beginning and 409.4MB in the end (delta: -176.4MB). Peak memory consumption was 283.4MB. 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 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 176.1s, OverallIterations: 24, TraceHistogramMax: 33, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.0s, AutomataDifference: 40.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 21.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 14 mSolverCounterUnknown, 373 SdHoareTripleChecker+Valid, 39.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 234 mSDsluCounter, 4201 SdHoareTripleChecker+Invalid, 38.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 39 IncrementalHoareTripleChecker+Unchecked, 3019 mSDsCounter, 413 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5474 IncrementalHoareTripleChecker+Invalid, 5940 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 413 mSolverCounterUnsat, 1182 mSDtfsCounter, 5474 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3693 GetRequests, 3410 SyntacticMatches, 28 SemanticMatches, 255 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 48.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=186occurred in iteration=23, InterpolantAutomatonStates: 184, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 24 MinimizatonAttempts, 97 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 36 LocationsWithAnnotation, 510 PreInvPairs, 776 NumberOfFragments, 1072 HoareAnnotationTreeSize, 510 FomulaSimplifications, 9227 FormulaSimplificationTreeSizeReduction, 8.1s HoareSimplificationTime, 36 FomulaSimplificationsInter, 302054 FormulaSimplificationTreeSizeReductionInter, 13.0s HoareSimplificationTimeInter, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((n <= a + 1 && a <= 20) && n * 6 + 6 == z) && 0 <= a) && n * 12 + n * y * 6 + 6 == x * 18 + y * 6) && y * 12 == 36 * (n * n) + 12 + n * 36 - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: (\old(cond) == cond || !(1 <= \old(cond))) && (\old(cond) == 0 || !(cond == 0)) RESULT: Ultimate proved your program to be correct! [2022-04-06 21:46:13,441 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...