/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/prod4br-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 12:02:08,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 12:02:08,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 12:02:08,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 12:02:08,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 12:02:08,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 12:02:08,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 12:02:08,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 12:02:08,198 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 12:02:08,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 12:02:08,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 12:02:08,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 12:02:08,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 12:02:08,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 12:02:08,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 12:02:08,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 12:02:08,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 12:02:08,201 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 12:02:08,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 12:02:08,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 12:02:08,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 12:02:08,201 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 12:02:08,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 12:02:08,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 12:02:08,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 12:02:08,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 12:02:08,202 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 12:02:08,202 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 12:02:08,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 12:02:08,202 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 12:02:08,202 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 12:02:08,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 12:02:08,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 12:02:08,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 12:02:08,442 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 12:02:08,443 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 12:02:08,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound50.c [2022-03-19 12:02:08,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b0384a7f/4252ee2bd05b48ed90b8bc30804a7a8a/FLAG4ad4dfc8e [2022-03-19 12:02:08,871 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 12:02:08,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound50.c [2022-03-19 12:02:08,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b0384a7f/4252ee2bd05b48ed90b8bc30804a7a8a/FLAG4ad4dfc8e [2022-03-19 12:02:08,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b0384a7f/4252ee2bd05b48ed90b8bc30804a7a8a [2022-03-19 12:02:08,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 12:02:08,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 12:02:08,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 12:02:08,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 12:02:08,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 12:02:08,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:02:08" (1/1) ... [2022-03-19 12:02:08,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54b110a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:08, skipping insertion in model container [2022-03-19 12:02:08,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:02:08" (1/1) ... [2022-03-19 12:02:08,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 12:02:08,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 12:02:09,114 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/prod4br-ll_valuebound50.c[524,537] [2022-03-19 12:02:09,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 12:02:09,151 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 12:02:09,160 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/prod4br-ll_valuebound50.c[524,537] [2022-03-19 12:02:09,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 12:02:09,178 INFO L208 MainTranslator]: Completed translation [2022-03-19 12:02:09,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:09 WrapperNode [2022-03-19 12:02:09,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 12:02:09,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 12:02:09,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 12:02:09,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 12:02:09,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:09" (1/1) ... [2022-03-19 12:02:09,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:09" (1/1) ... [2022-03-19 12:02:09,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:09" (1/1) ... [2022-03-19 12:02:09,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:09" (1/1) ... [2022-03-19 12:02:09,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:09" (1/1) ... [2022-03-19 12:02:09,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:09" (1/1) ... [2022-03-19 12:02:09,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:09" (1/1) ... [2022-03-19 12:02:09,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 12:02:09,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 12:02:09,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 12:02:09,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 12:02:09,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:09" (1/1) ... [2022-03-19 12:02:09,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 12:02:09,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:09,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 12:02:09,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 12:02:09,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 12:02:09,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 12:02:09,280 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 12:02:09,280 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 12:02:09,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 12:02:09,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 12:02:09,281 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 12:02:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 12:02:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 12:02:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 12:02:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 12:02:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 12:02:09,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 12:02:09,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 12:02:09,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 12:02:09,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 12:02:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 12:02:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 12:02:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 12:02:09,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 12:02:09,335 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 12:02:09,337 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 12:02:09,455 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 12:02:09,460 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 12:02:09,460 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 12:02:09,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:02:09 BoogieIcfgContainer [2022-03-19 12:02:09,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 12:02:09,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 12:02:09,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 12:02:09,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 12:02:09,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 12:02:08" (1/3) ... [2022-03-19 12:02:09,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270be8d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:02:09, skipping insertion in model container [2022-03-19 12:02:09,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:09" (2/3) ... [2022-03-19 12:02:09,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270be8d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:02:09, skipping insertion in model container [2022-03-19 12:02:09,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:02:09" (3/3) ... [2022-03-19 12:02:09,469 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound50.c [2022-03-19 12:02:09,474 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 12:02:09,474 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 12:02:09,516 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 12:02:09,529 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 [2022-03-19 12:02:09,530 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 12:02:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 12:02:09,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 12:02:09,562 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:09,562 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:02:09,563 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:09,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:09,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 1 times [2022-03-19 12:02:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:09,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [23817131] [2022-03-19 12:02:09,622 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:09,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 2 times [2022-03-19 12:02:09,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:09,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722424473] [2022-03-19 12:02:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:09,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:02:09,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 12:02:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:02:09,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 12:02:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:02:09,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 12:02:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:02:09,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 12:02:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:02:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:02:09,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:09,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722424473] [2022-03-19 12:02:09,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722424473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:09,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:09,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 12:02:09,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:09,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [23817131] [2022-03-19 12:02:09,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [23817131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:09,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:09,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 12:02:09,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107464447] [2022-03-19 12:02:09,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:09,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 12:02:09,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:09,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 12:02:09,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 12:02:09,904 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 12:02:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:09,996 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2022-03-19 12:02:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 12:02:09,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-19 12:02:10,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:10,009 INFO L225 Difference]: With dead ends: 61 [2022-03-19 12:02:10,009 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 12:02:10,013 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 12:02:10,019 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:10,021 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 12:02:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 12:02:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-19 12:02:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 12:02:10,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-03-19 12:02:10,069 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 28 [2022-03-19 12:02:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:10,069 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-03-19 12:02:10,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 12:02:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-03-19 12:02:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 12:02:10,073 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:10,073 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:02:10,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 12:02:10,074 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:10,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 1 times [2022-03-19 12:02:10,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:10,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1458182359] [2022-03-19 12:02:10,078 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:10,078 INFO L85 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 2 times [2022-03-19 12:02:10,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:10,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916377400] [2022-03-19 12:02:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:10,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:10,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:10,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681976596] [2022-03-19 12:02:10,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:02:10,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:10,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:10,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:02:10,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 12:02:10,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 12:02:10,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:10,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 12:02:10,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:02:10,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 12:02:10,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:10,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916377400] [2022-03-19 12:02:10,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:10,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681976596] [2022-03-19 12:02:10,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681976596] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:10,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:10,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 12:02:10,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:10,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1458182359] [2022-03-19 12:02:10,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1458182359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:10,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:10,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 12:02:10,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299008710] [2022-03-19 12:02:10,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:10,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 12:02:10,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:10,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 12:02:10,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 12:02:10,356 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 12:02:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:10,465 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-03-19 12:02:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 12:02:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-19 12:02:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:10,469 INFO L225 Difference]: With dead ends: 43 [2022-03-19 12:02:10,469 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 12:02:10,471 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 12:02:10,472 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:10,475 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 101 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 12:02:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 12:02:10,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2022-03-19 12:02:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 12:02:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-03-19 12:02:10,490 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 28 [2022-03-19 12:02:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:10,491 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-03-19 12:02:10,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 12:02:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-03-19 12:02:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 12:02:10,492 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:10,492 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:02:10,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 12:02:10,710 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:10,710 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:10,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1139707498, now seen corresponding path program 1 times [2022-03-19 12:02:10,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:10,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1076086965] [2022-03-19 12:02:10,712 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:10,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1139707498, now seen corresponding path program 2 times [2022-03-19 12:02:10,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:10,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830901821] [2022-03-19 12:02:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:10,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:10,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:10,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074304845] [2022-03-19 12:02:10,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:02:10,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:10,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:10,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:02:10,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 12:02:10,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:02:10,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:10,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 12:02:10,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 12:02:11,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:02:11,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:11,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830901821] [2022-03-19 12:02:11,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:11,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074304845] [2022-03-19 12:02:11,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074304845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:02:11,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:02:11,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-03-19 12:02:11,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:11,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1076086965] [2022-03-19 12:02:11,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1076086965] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:11,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:11,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 12:02:11,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975142441] [2022-03-19 12:02:11,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:11,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 12:02:11,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:11,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 12:02:11,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-19 12:02:11,526 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 12:02:13,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:15,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:16,047 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-03-19 12:02:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 12:02:16,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2022-03-19 12:02:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:16,049 INFO L225 Difference]: With dead ends: 47 [2022-03-19 12:02:16,049 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 12:02:16,049 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-19 12:02:16,050 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:16,051 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 148 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 209 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-03-19 12:02:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 12:02:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-03-19 12:02:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 12:02:16,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-19 12:02:16,062 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 34 [2022-03-19 12:02:16,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:16,062 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-19 12:02:16,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 12:02:16,062 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-19 12:02:16,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 12:02:16,063 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:16,064 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:02:16,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 12:02:16,290 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 12:02:16,290 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:16,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:16,291 INFO L85 PathProgramCache]: Analyzing trace with hash 412541489, now seen corresponding path program 1 times [2022-03-19 12:02:16,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:16,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2141161499] [2022-03-19 12:02:16,291 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:16,292 INFO L85 PathProgramCache]: Analyzing trace with hash 412541489, now seen corresponding path program 2 times [2022-03-19 12:02:16,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:16,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524513603] [2022-03-19 12:02:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:16,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:16,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:16,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875923915] [2022-03-19 12:02:16,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:02:16,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:16,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:16,308 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:02:16,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 12:02:16,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:02:16,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 12:02:16,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 12:02:19,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 12:02:19,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:19,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524513603] [2022-03-19 12:02:19,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:19,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875923915] [2022-03-19 12:02:19,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875923915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:02:19,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:02:19,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-19 12:02:19,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:19,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2141161499] [2022-03-19 12:02:19,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2141161499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:19,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:19,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 12:02:19,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654325751] [2022-03-19 12:02:19,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:19,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 12:02:19,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:19,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 12:02:19,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-19 12:02:19,625 INFO L87 Difference]: Start difference. First operand 41 states and 49 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 12:02:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:19,984 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-03-19 12:02:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 12:02:19,985 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-03-19 12:02:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:19,986 INFO L225 Difference]: With dead ends: 59 [2022-03-19 12:02:19,986 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 12:02:19,986 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-19 12:02:19,987 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:19,987 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 140 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 12:02:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 12:02:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2022-03-19 12:02:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 12:02:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-03-19 12:02:20,000 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 36 [2022-03-19 12:02:20,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:20,001 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-03-19 12:02:20,001 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 12:02:20,001 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-03-19 12:02:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 12:02:20,002 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:20,002 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:02:20,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 12:02:20,226 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:20,226 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:20,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2032180221, now seen corresponding path program 1 times [2022-03-19 12:02:20,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:20,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2030654375] [2022-03-19 12:02:20,228 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:20,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2032180221, now seen corresponding path program 2 times [2022-03-19 12:02:20,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:20,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879084720] [2022-03-19 12:02:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:20,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:20,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:20,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524776852] [2022-03-19 12:02:20,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:02:20,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:20,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:20,260 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:02:20,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 12:02:20,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:02:20,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:20,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 12:02:20,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 12:02:20,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:02:20,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:20,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879084720] [2022-03-19 12:02:20,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:20,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524776852] [2022-03-19 12:02:20,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524776852] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 12:02:20,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 12:02:20,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 12 [2022-03-19 12:02:20,886 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:20,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2030654375] [2022-03-19 12:02:20,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2030654375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:20,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:20,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 12:02:20,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441322087] [2022-03-19 12:02:20,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:20,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 12:02:20,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:20,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 12:02:20,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-19 12:02:20,888 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 12:02:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:21,306 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-03-19 12:02:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 12:02:21,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 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 37 [2022-03-19 12:02:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:21,309 INFO L225 Difference]: With dead ends: 54 [2022-03-19 12:02:21,309 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 12:02:21,309 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-19 12:02:21,310 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:21,310 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 112 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 12:02:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 12:02:21,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-03-19 12:02:21,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 12:02:21,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-03-19 12:02:21,321 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 37 [2022-03-19 12:02:21,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:21,322 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-03-19 12:02:21,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 12:02:21,322 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-03-19 12:02:21,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 12:02:21,323 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:21,323 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:02:21,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 12:02:21,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:21,539 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash 262800198, now seen corresponding path program 1 times [2022-03-19 12:02:21,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:21,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [623607178] [2022-03-19 12:02:21,541 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:21,541 INFO L85 PathProgramCache]: Analyzing trace with hash 262800198, now seen corresponding path program 2 times [2022-03-19 12:02:21,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:21,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438691486] [2022-03-19 12:02:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:21,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:21,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:21,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487641294] [2022-03-19 12:02:21,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:02:21,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:21,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:21,567 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:02:21,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 12:02:21,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:02:21,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:21,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 12:02:21,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 12:02:21,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 12:02:21,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:21,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438691486] [2022-03-19 12:02:21,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:21,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487641294] [2022-03-19 12:02:21,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487641294] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 12:02:21,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 12:02:21,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-19 12:02:21,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:21,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [623607178] [2022-03-19 12:02:21,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [623607178] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:21,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:21,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 12:02:21,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082829998] [2022-03-19 12:02:21,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:21,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 12:02:21,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 12:02:21,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-19 12:02:21,895 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 12:02:22,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:22,029 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-03-19 12:02:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 12:02:22,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-03-19 12:02:22,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:22,030 INFO L225 Difference]: With dead ends: 51 [2022-03-19 12:02:22,030 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 12:02:22,030 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-19 12:02:22,031 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:22,031 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 12:02:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 12:02:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 12:02:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 12:02:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-03-19 12:02:22,039 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 39 [2022-03-19 12:02:22,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:22,039 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-03-19 12:02:22,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 12:02:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-03-19 12:02:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 12:02:22,040 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:22,040 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:02:22,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 12:02:22,241 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:22,241 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:22,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:22,241 INFO L85 PathProgramCache]: Analyzing trace with hash -982526417, now seen corresponding path program 1 times [2022-03-19 12:02:22,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:22,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [710203319] [2022-03-19 12:02:22,242 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:22,242 INFO L85 PathProgramCache]: Analyzing trace with hash -982526417, now seen corresponding path program 2 times [2022-03-19 12:02:22,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:22,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335468890] [2022-03-19 12:02:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:22,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:22,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:22,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816634263] [2022-03-19 12:02:22,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:02:22,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:22,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:22,257 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:02:22,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 12:02:22,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:02:22,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:22,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 12:02:22,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 12:02:22,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 12:02:22,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:22,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335468890] [2022-03-19 12:02:22,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:22,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816634263] [2022-03-19 12:02:22,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816634263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:02:22,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:02:22,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-03-19 12:02:22,724 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:22,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [710203319] [2022-03-19 12:02:22,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [710203319] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:22,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:22,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 12:02:22,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032114971] [2022-03-19 12:02:22,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:22,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 12:02:22,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:22,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 12:02:22,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-19 12:02:22,726 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 12:02:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:22,828 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-03-19 12:02:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 12:02:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2022-03-19 12:02:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:22,832 INFO L225 Difference]: With dead ends: 52 [2022-03-19 12:02:22,832 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 12:02:22,833 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-19 12:02:22,833 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:22,834 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 143 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 12:02:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 12:02:22,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2022-03-19 12:02:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 12:02:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-03-19 12:02:22,843 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 42 [2022-03-19 12:02:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:22,844 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-03-19 12:02:22,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 12:02:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-03-19 12:02:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 12:02:22,845 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:22,845 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:02:22,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 12:02:23,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:23,068 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1669465851, now seen corresponding path program 1 times [2022-03-19 12:02:23,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:23,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [194499260] [2022-03-19 12:02:23,069 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:23,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1669465851, now seen corresponding path program 2 times [2022-03-19 12:02:23,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:23,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696245190] [2022-03-19 12:02:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:23,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:23,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:23,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24180116] [2022-03-19 12:02:23,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:02:23,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:23,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:23,087 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:02:23,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 12:02:23,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:02:23,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:23,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 12:02:23,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 12:02:23,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 12:02:23,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:23,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696245190] [2022-03-19 12:02:23,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:23,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24180116] [2022-03-19 12:02:23,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24180116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:02:23,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:02:23,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-19 12:02:23,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:23,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [194499260] [2022-03-19 12:02:23,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [194499260] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:23,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:23,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 12:02:23,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162069708] [2022-03-19 12:02:23,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:23,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 12:02:23,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:23,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 12:02:23,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 12:02:23,484 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 12:02:25,669 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:25,831 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-03-19 12:02:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 12:02:25,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-03-19 12:02:25,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:25,832 INFO L225 Difference]: With dead ends: 58 [2022-03-19 12:02:25,832 INFO L226 Difference]: Without dead ends: 53 [2022-03-19 12:02:25,832 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-19 12:02:25,833 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:25,833 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 170 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 12:02:25,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-19 12:02:25,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-03-19 12:02:25,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 12:02:25,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-03-19 12:02:25,842 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 43 [2022-03-19 12:02:25,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:25,842 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-03-19 12:02:25,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 12:02:25,842 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-03-19 12:02:25,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 12:02:25,843 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:25,843 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:02:25,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 12:02:26,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:26,061 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:26,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:26,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1372706166, now seen corresponding path program 1 times [2022-03-19 12:02:26,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:26,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [757063267] [2022-03-19 12:02:26,062 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:26,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1372706166, now seen corresponding path program 2 times [2022-03-19 12:02:26,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:26,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286226053] [2022-03-19 12:02:26,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:26,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:26,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:26,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494787906] [2022-03-19 12:02:26,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:02:26,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:26,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:26,076 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:02:26,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 12:02:26,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:02:26,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:26,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 12:02:26,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 12:02:26,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 12:02:26,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:26,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286226053] [2022-03-19 12:02:26,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:26,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494787906] [2022-03-19 12:02:26,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494787906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:02:26,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:02:26,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-19 12:02:26,427 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:26,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [757063267] [2022-03-19 12:02:26,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [757063267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:26,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:26,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 12:02:26,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359184338] [2022-03-19 12:02:26,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:26,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 12:02:26,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:26,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 12:02:26,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 12:02:26,429 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 12:02:28,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:28,758 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-03-19 12:02:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 12:02:28,758 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-03-19 12:02:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:28,759 INFO L225 Difference]: With dead ends: 53 [2022-03-19 12:02:28,759 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 12:02:28,759 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-19 12:02:28,760 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:28,760 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 148 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 12:02:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 12:02:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2022-03-19 12:02:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 12:02:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-03-19 12:02:28,769 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 44 [2022-03-19 12:02:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:28,769 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-03-19 12:02:28,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 12:02:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-03-19 12:02:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 12:02:28,770 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:28,770 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:02:28,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 12:02:28,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 12:02:28,970 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:28,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1114540728, now seen corresponding path program 1 times [2022-03-19 12:02:28,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:28,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1737669821] [2022-03-19 12:02:28,971 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:28,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1114540728, now seen corresponding path program 2 times [2022-03-19 12:02:28,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:28,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856061102] [2022-03-19 12:02:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:28,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:28,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:28,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045260242] [2022-03-19 12:02:28,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:02:28,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:28,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:28,982 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:02:28,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 12:02:29,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:02:29,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:29,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 12:02:29,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:29,331 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 12:02:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 12:02:29,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 12:02:29,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:29,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856061102] [2022-03-19 12:02:29,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:29,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045260242] [2022-03-19 12:02:29,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045260242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:02:29,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:02:29,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2022-03-19 12:02:29,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:29,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1737669821] [2022-03-19 12:02:29,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1737669821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:29,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:29,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 12:02:29,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808416425] [2022-03-19 12:02:29,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:29,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 12:02:29,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:29,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 12:02:29,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-19 12:02:29,968 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 12:02:32,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:34,671 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:34,945 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-03-19 12:02:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 12:02:34,946 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2022-03-19 12:02:34,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:34,947 INFO L225 Difference]: With dead ends: 57 [2022-03-19 12:02:34,947 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 12:02:34,947 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-03-19 12:02:34,948 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:34,948 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 202 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-03-19 12:02:34,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 12:02:34,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2022-03-19 12:02:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 12:02:34,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-03-19 12:02:34,959 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 44 [2022-03-19 12:02:34,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:34,959 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-03-19 12:02:34,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 12:02:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-03-19 12:02:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 12:02:34,960 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:34,960 INFO L500 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2022-03-19 12:02:34,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 12:02:35,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 12:02:35,172 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:35,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:35,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2079436449, now seen corresponding path program 1 times [2022-03-19 12:02:35,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:35,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78111895] [2022-03-19 12:02:35,173 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:35,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2079436449, now seen corresponding path program 2 times [2022-03-19 12:02:35,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:35,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474107915] [2022-03-19 12:02:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:35,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:35,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:35,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793512864] [2022-03-19 12:02:35,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:02:35,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:35,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:35,191 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:02:35,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 12:02:35,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:02:35,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:35,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 12:02:35,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:02:35,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 12:02:36,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:36,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474107915] [2022-03-19 12:02:36,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:36,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793512864] [2022-03-19 12:02:36,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793512864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:02:36,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:02:36,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 19 [2022-03-19 12:02:36,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:36,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78111895] [2022-03-19 12:02:36,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78111895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:36,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:36,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 12:02:36,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090554801] [2022-03-19 12:02:36,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:36,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 12:02:36,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:36,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 12:02:36,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-19 12:02:36,224 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-19 12:02:38,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:41,339 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:43,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:43,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:43,383 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2022-03-19 12:02:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 12:02:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 52 [2022-03-19 12:02:43,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:43,384 INFO L225 Difference]: With dead ends: 63 [2022-03-19 12:02:43,384 INFO L226 Difference]: Without dead ends: 58 [2022-03-19 12:02:43,385 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-03-19 12:02:43,385 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 37 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:43,386 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 142 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 293 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-03-19 12:02:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-19 12:02:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2022-03-19 12:02:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 12:02:43,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2022-03-19 12:02:43,403 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 52 [2022-03-19 12:02:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:43,404 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2022-03-19 12:02:43,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-19 12:02:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2022-03-19 12:02:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 12:02:43,405 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:43,405 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:02:43,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 12:02:43,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 12:02:43,620 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:43,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:43,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1287237523, now seen corresponding path program 1 times [2022-03-19 12:02:43,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:43,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1210098797] [2022-03-19 12:02:43,620 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:43,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1287237523, now seen corresponding path program 2 times [2022-03-19 12:02:43,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:43,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278841116] [2022-03-19 12:02:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:43,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:43,637 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:43,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384667810] [2022-03-19 12:02:43,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:02:43,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:43,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:43,639 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) [2022-03-19 12:02:43,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 12:02:43,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:02:43,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:43,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 12:02:43,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:02:43,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 12:02:44,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:44,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278841116] [2022-03-19 12:02:44,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:44,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384667810] [2022-03-19 12:02:44,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384667810] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 12:02:44,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 12:02:44,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 15 [2022-03-19 12:02:44,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:44,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1210098797] [2022-03-19 12:02:44,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1210098797] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:44,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:44,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 12:02:44,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031176298] [2022-03-19 12:02:44,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:44,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 12:02:44,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:44,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 12:02:44,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-19 12:02:44,180 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 12:02:44,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:44,353 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-03-19 12:02:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 12:02:44,354 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2022-03-19 12:02:44,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:44,354 INFO L225 Difference]: With dead ends: 72 [2022-03-19 12:02:44,354 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 12:02:44,355 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-03-19 12:02:44,355 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:44,356 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 110 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 12:02:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 12:02:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-03-19 12:02:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 12:02:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2022-03-19 12:02:44,387 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 53 [2022-03-19 12:02:44,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:44,388 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2022-03-19 12:02:44,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 12:02:44,388 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2022-03-19 12:02:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 12:02:44,389 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:44,389 INFO L500 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2022-03-19 12:02:44,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 12:02:44,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 12:02:44,595 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:44,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:44,596 INFO L85 PathProgramCache]: Analyzing trace with hash 338559610, now seen corresponding path program 3 times [2022-03-19 12:02:44,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:44,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [616499108] [2022-03-19 12:02:44,596 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:44,597 INFO L85 PathProgramCache]: Analyzing trace with hash 338559610, now seen corresponding path program 4 times [2022-03-19 12:02:44,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:44,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143017150] [2022-03-19 12:02:44,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:44,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:44,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:44,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906395153] [2022-03-19 12:02:44,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 12:02:44,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:44,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:44,615 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) [2022-03-19 12:02:44,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 12:02:44,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 12:02:44,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:44,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 12:02:44,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:02:44,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 12:02:45,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:45,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143017150] [2022-03-19 12:02:45,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:45,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906395153] [2022-03-19 12:02:45,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906395153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:02:45,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:02:45,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2022-03-19 12:02:45,133 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:45,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [616499108] [2022-03-19 12:02:45,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [616499108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:45,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:45,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 12:02:45,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316965762] [2022-03-19 12:02:45,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:45,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 12:02:45,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:45,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 12:02:45,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-19 12:02:45,134 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 12:02:45,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:45,303 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2022-03-19 12:02:45,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 12:02:45,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 54 [2022-03-19 12:02:45,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:45,304 INFO L225 Difference]: With dead ends: 84 [2022-03-19 12:02:45,304 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 12:02:45,305 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-19 12:02:45,306 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:45,306 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 144 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 12:02:45,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 12:02:45,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-03-19 12:02:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 12:02:45,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-03-19 12:02:45,330 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 54 [2022-03-19 12:02:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:45,331 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-03-19 12:02:45,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 12:02:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-03-19 12:02:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 12:02:45,331 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:45,332 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1] [2022-03-19 12:02:45,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 12:02:45,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 12:02:45,548 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1563197702, now seen corresponding path program 3 times [2022-03-19 12:02:45,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:45,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1755980105] [2022-03-19 12:02:45,549 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:45,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1563197702, now seen corresponding path program 4 times [2022-03-19 12:02:45,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:45,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548669188] [2022-03-19 12:02:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:45,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:45,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:45,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508654456] [2022-03-19 12:02:45,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 12:02:45,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:45,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:45,558 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) [2022-03-19 12:02:45,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 12:02:45,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 12:02:45,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:45,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 12:02:45,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 12:02:46,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 12:02:46,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:46,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548669188] [2022-03-19 12:02:46,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508654456] [2022-03-19 12:02:46,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508654456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:02:46,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:02:46,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2022-03-19 12:02:46,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1755980105] [2022-03-19 12:02:46,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1755980105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:46,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:46,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 12:02:46,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937959455] [2022-03-19 12:02:46,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:46,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 12:02:46,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 12:02:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-19 12:02:46,386 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 12:02:48,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:51,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:02:51,492 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2022-03-19 12:02:51,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 12:02:51,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 60 [2022-03-19 12:02:51,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:02:51,493 INFO L225 Difference]: With dead ends: 98 [2022-03-19 12:02:51,493 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 12:02:51,494 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-03-19 12:02:51,494 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 34 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-19 12:02:51,495 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 127 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 230 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-03-19 12:02:51,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 12:02:51,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2022-03-19 12:02:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 12:02:51,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2022-03-19 12:02:51,538 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 60 [2022-03-19 12:02:51,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:02:51,538 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2022-03-19 12:02:51,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 12:02:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2022-03-19 12:02:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 12:02:51,539 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:02:51,539 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:02:51,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-19 12:02:51,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 12:02:51,754 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:02:51,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:02:51,754 INFO L85 PathProgramCache]: Analyzing trace with hash 464884373, now seen corresponding path program 1 times [2022-03-19 12:02:51,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:51,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668724913] [2022-03-19 12:02:51,755 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:02:51,755 INFO L85 PathProgramCache]: Analyzing trace with hash 464884373, now seen corresponding path program 2 times [2022-03-19 12:02:51,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:02:51,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526321438] [2022-03-19 12:02:51,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:02:51,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:02:51,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:02:51,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923803098] [2022-03-19 12:02:51,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:02:51,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:02:51,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:02:51,771 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) [2022-03-19 12:02:51,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 12:02:51,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:02:51,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:02:51,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 12:02:51,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:02:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 12:02:52,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:02:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-19 12:02:52,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:02:52,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526321438] [2022-03-19 12:02:52,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:02:52,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923803098] [2022-03-19 12:02:52,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923803098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:02:52,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:02:52,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 20 [2022-03-19 12:02:52,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:02:52,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668724913] [2022-03-19 12:02:52,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668724913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:02:52,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:02:52,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 12:02:52,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875493769] [2022-03-19 12:02:52,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:02:52,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 12:02:52,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:02:52,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 12:02:52,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-19 12:02:52,629 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-19 12:02:54,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:56,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:02:58,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:03:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:03:00,066 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2022-03-19 12:03:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 12:03:00,066 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 62 [2022-03-19 12:03:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:03:00,067 INFO L225 Difference]: With dead ends: 97 [2022-03-19 12:03:00,067 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 12:03:00,068 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-03-19 12:03:00,068 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 17 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-03-19 12:03:00,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 162 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 349 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2022-03-19 12:03:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 12:03:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2022-03-19 12:03:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 12:03:00,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2022-03-19 12:03:00,093 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 62 [2022-03-19 12:03:00,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:03:00,093 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2022-03-19 12:03:00,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-19 12:03:00,093 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2022-03-19 12:03:00,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 12:03:00,094 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:03:00,094 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:03:00,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 12:03:00,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:03:00,296 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:03:00,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:03:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash 487516627, now seen corresponding path program 5 times [2022-03-19 12:03:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:03:00,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1482550682] [2022-03-19 12:03:00,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:03:00,297 INFO L85 PathProgramCache]: Analyzing trace with hash 487516627, now seen corresponding path program 6 times [2022-03-19 12:03:00,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:03:00,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746769083] [2022-03-19 12:03:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:03:00,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:03:00,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:03:00,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889453988] [2022-03-19 12:03:00,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 12:03:00,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:03:00,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:03:00,308 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) [2022-03-19 12:03:00,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 12:03:00,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 12:03:00,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:03:00,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 12:03:00,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:03:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-19 12:03:00,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:03:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-19 12:03:00,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:03:00,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746769083] [2022-03-19 12:03:00,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:03:00,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889453988] [2022-03-19 12:03:00,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889453988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:03:00,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:03:00,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 12:03:00,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:03:00,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1482550682] [2022-03-19 12:03:00,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1482550682] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:03:00,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:03:00,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 12:03:00,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184104725] [2022-03-19 12:03:00,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:03:00,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 12:03:00,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:03:00,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 12:03:00,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 12:03:00,651 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 12:03:02,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:03:04,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:03:04,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:03:04,488 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-03-19 12:03:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 12:03:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 62 [2022-03-19 12:03:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:03:04,488 INFO L225 Difference]: With dead ends: 72 [2022-03-19 12:03:04,488 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 12:03:04,489 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-19 12:03:04,489 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-19 12:03:04,490 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-03-19 12:03:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 12:03:04,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 12:03:04,490 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) [2022-03-19 12:03:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 12:03:04,491 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2022-03-19 12:03:04,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:03:04,491 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 12:03:04,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 12:03:04,491 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 12:03:04,491 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 12:03:04,493 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 12:03:04,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 12:03:04,695 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,SelfDestructingSolverStorable15 [2022-03-19 12:03:04,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 12:03:22,906 WARN L232 SmtUtils]: Spent 11.34s on a formula simplification. DAG size of input: 165 DAG size of output: 162 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-19 12:03:32,230 WARN L232 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 156 DAG size of output: 155 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-19 12:03:43,794 WARN L232 SmtUtils]: Spent 11.54s on a formula simplification. DAG size of input: 171 DAG size of output: 169 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-19 12:03:56,050 WARN L232 SmtUtils]: Spent 12.24s on a formula simplification. DAG size of input: 139 DAG size of output: 28 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 12:04:38,632 WARN L232 SmtUtils]: Spent 42.58s on a formula simplification. DAG size of input: 145 DAG size of output: 37 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 12:05:29,414 WARN L232 SmtUtils]: Spent 50.74s on a formula simplification. DAG size of input: 150 DAG size of output: 28 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 12:05:42,506 WARN L232 SmtUtils]: Spent 12.93s on a formula simplification. DAG size of input: 139 DAG size of output: 28 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 12:06:07,814 WARN L232 SmtUtils]: Spent 25.30s on a formula simplification. DAG size of input: 143 DAG size of output: 36 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 12:06:54,429 WARN L232 SmtUtils]: Spent 46.59s on a formula simplification. DAG size of input: 155 DAG size of output: 40 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 12:06:54,433 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-03-19 12:06:54,433 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-03-19 12:06:54,433 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-03-19 12:06:54,433 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-03-19 12:06:54,434 INFO L878 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-19 12:06:54,434 INFO L878 garLoopResultBuilder]: At program point L9-2(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-19 12:06:54,434 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-19 12:06:54,434 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 50) (<= 1 main_~y~0)) [2022-03-19 12:06:54,434 INFO L885 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: true [2022-03-19 12:06:54,434 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 19 60) the Hoare annotation is: true [2022-03-19 12:06:54,434 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 19 60) the Hoare annotation is: true [2022-03-19 12:06:54,434 INFO L878 garLoopResultBuilder]: At program point L44(lines 44 54) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (or (not (= (mod main_~b~0 2) 0)) (not (= (mod main_~a~0 2) 0))) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (<= main_~x~0 50) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~a~0 0)) (<= 1 main_~b~0) (<= 1 main_~y~0))) [2022-03-19 12:06:54,434 INFO L878 garLoopResultBuilder]: At program point L40(lines 40 54) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (<= main_~x~0 50) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~a~0 0)) (<= 1 main_~b~0) (<= 1 main_~y~0))) [2022-03-19 12:06:54,434 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 55) the Hoare annotation is: (and (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= main_~x~0 50) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-03-19 12:06:54,434 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 60) the Hoare annotation is: true [2022-03-19 12:06:54,434 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 50)) [2022-03-19 12:06:54,434 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 (+ (div (+ (- 2) main_~y~0) 2) 1)) (<= 0 main_~x~0) (<= main_~x~0 50)) [2022-03-19 12:06:54,434 INFO L878 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= main_~x~0 50) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-03-19 12:06:54,434 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-03-19 12:06:54,434 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 50)) [2022-03-19 12:06:54,435 INFO L878 garLoopResultBuilder]: At program point L47(lines 47 54) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (or (not (= (mod main_~b~0 2) 0)) (not (= (mod main_~a~0 2) 0))) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (<= main_~x~0 50) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~a~0 0)) (<= 1 main_~b~0) (<= 1 main_~y~0))) [2022-03-19 12:06:54,435 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 34 55) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0))) (.cse2 (<= main_~x~0 50)) (.cse3 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 (not (= (mod (+ main_~a~0 1) 2) 0)) (<= 0 main_~b~0) .cse3) (and .cse0 .cse1 .cse2 (<= 1 main_~b~0) .cse3))) [2022-03-19 12:06:54,435 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0))) (.cse2 (<= main_~x~0 50)) (.cse3 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 (not (= (mod (+ main_~a~0 1) 2) 0)) (<= 0 main_~b~0) .cse3) (and .cse0 .cse1 .cse2 (<= 1 main_~b~0) .cse3))) [2022-03-19 12:06:54,435 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 34 55) the Hoare annotation is: (let ((.cse5 (* main_~y~0 main_~x~0))) (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (or (= main_~q~0 .cse5) (and (= (mod (+ .cse5 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~b~0 0)) (not (= main_~a~0 0))))) (.cse2 (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse5)) (.cse3 (<= main_~x~0 50)) (.cse4 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 1 main_~b~0) .cse4) (and .cse0 .cse1 .cse2 .cse3 (not (= (mod (+ main_~a~0 1) 2) 0)) (<= 0 main_~b~0) .cse4)))) [2022-03-19 12:06:54,435 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-19 12:06:54,435 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|)) [2022-03-19 12:06:54,435 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-19 12:06:54,435 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-19 12:06:54,435 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-19 12:06:54,435 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 12:06:54,435 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-19 12:06:54,435 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-19 12:06:54,436 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 12:06:54,436 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 15) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 12:06:54,436 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 12:06:54,436 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 12:06:54,436 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 12:06:54,438 INFO L718 BasicCegarLoop]: Path program histogram: [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-19 12:06:54,439 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 12:06:54,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 12:06:54 BoogieIcfgContainer [2022-03-19 12:06:54,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 12:06:54,452 INFO L158 Benchmark]: Toolchain (without parser) took 285557.09ms. Allocated memory was 172.0MB in the beginning and 262.1MB in the end (delta: 90.2MB). Free memory was 122.3MB in the beginning and 202.1MB in the end (delta: -79.8MB). Peak memory consumption was 138.1MB. Max. memory is 8.0GB. [2022-03-19 12:06:54,452 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 172.0MB. Free memory was 139.1MB in the beginning and 138.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 12:06:54,452 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.33ms. Allocated memory is still 172.0MB. Free memory was 122.1MB in the beginning and 148.0MB in the end (delta: -25.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-19 12:06:54,453 INFO L158 Benchmark]: Boogie Preprocessor took 27.69ms. Allocated memory is still 172.0MB. Free memory was 148.0MB in the beginning and 146.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 12:06:54,453 INFO L158 Benchmark]: RCFGBuilder took 253.45ms. Allocated memory is still 172.0MB. Free memory was 146.3MB in the beginning and 135.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-19 12:06:54,453 INFO L158 Benchmark]: TraceAbstraction took 284987.60ms. Allocated memory was 172.0MB in the beginning and 262.1MB in the end (delta: 90.2MB). Free memory was 134.8MB in the beginning and 202.1MB in the end (delta: -67.3MB). Peak memory consumption was 150.2MB. Max. memory is 8.0GB. [2022-03-19 12:06:54,454 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 172.0MB. Free memory was 139.1MB in the beginning and 138.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 282.33ms. Allocated memory is still 172.0MB. Free memory was 122.1MB in the beginning and 148.0MB in the end (delta: -25.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.69ms. Allocated memory is still 172.0MB. Free memory was 148.0MB in the beginning and 146.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 253.45ms. Allocated memory is still 172.0MB. Free memory was 146.3MB in the beginning and 135.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 284987.60ms. Allocated memory was 172.0MB in the beginning and 262.1MB in the end (delta: 90.2MB). Free memory was 134.8MB in the beginning and 202.1MB in the end (delta: -67.3MB). Peak memory consumption was 150.2MB. 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: 14]: 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, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 284.9s, OverallIterations: 16, TraceHistogramMax: 5, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 39.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 229.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 13 mSolverCounterUnknown, 435 SdHoareTripleChecker+Valid, 36.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 401 mSDsluCounter, 2151 SdHoareTripleChecker+Invalid, 36.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1746 mSDsCounter, 201 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2215 IncrementalHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 201 mSolverCounterUnsat, 405 mSDtfsCounter, 2215 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1406 GetRequests, 1159 SyntacticMatches, 14 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=15, InterpolantAutomatonStates: 162, 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, 16 MinimizatonAttempts, 119 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 34 LocationsWithAnnotation, 218 PreInvPairs, 332 NumberOfFragments, 528 HoareAnnotationTreeSize, 218 FomulaSimplifications, 37909 FormulaSimplificationTreeSizeReduction, 39.1s HoareSimplificationTime, 34 FomulaSimplificationsInter, 721232 FormulaSimplificationTreeSizeReductionInter, 190.6s 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: 34]: Loop Invariant Derived loop invariant: (((((0 <= x && q + b * a * p == y * x) && x <= 50) && !((a + 1) % 2 == 0)) && 0 <= b) && 1 <= y) || ((((0 <= x && q + b * a * p == y * x) && x <= 50) && 1 <= b) && 1 <= y) - ProcedureContractResult [Line: 8]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 19]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-19 12:06:54,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...