/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/hard-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 21:32:03,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 21:32:03,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 21:32:03,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 21:32:03,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 21:32:03,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 21:32:03,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 21:32:03,768 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 21:32:03,775 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 21:32:03,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 21:32:03,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 21:32:03,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 21:32:03,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 21:32:03,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 21:32:03,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 21:32:03,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 21:32:03,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 21:32:03,777 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 21:32:03,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 21:32:03,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 21:32:03,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 21:32:03,778 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 21:32:03,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 21:32:03,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 21:32:03,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 21:32:03,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 21:32:03,778 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 21:32:03,778 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 21:32:03,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 21:32:03,778 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 21:32:03,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 21:32:03,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 21:32:03,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 21:32:03,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 21:32:03,978 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 21:32:03,979 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 21:32:03,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2022-03-20 21:32:04,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcc210e1a/21a031b69e214772b93115b0d462fd3a/FLAG88d40e864 [2022-03-20 21:32:04,381 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 21:32:04,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2022-03-20 21:32:04,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcc210e1a/21a031b69e214772b93115b0d462fd3a/FLAG88d40e864 [2022-03-20 21:32:04,398 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcc210e1a/21a031b69e214772b93115b0d462fd3a [2022-03-20 21:32:04,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 21:32:04,401 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 21:32:04,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 21:32:04,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 21:32:04,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 21:32:04,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:32:04" (1/1) ... [2022-03-20 21:32:04,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ee7c45e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:04, skipping insertion in model container [2022-03-20 21:32:04,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:32:04" (1/1) ... [2022-03-20 21:32:04,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 21:32:04,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 21:32:04,554 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/hard-ll_valuebound5.c[538,551] [2022-03-20 21:32:04,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 21:32:04,580 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 21:32:04,588 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/hard-ll_valuebound5.c[538,551] [2022-03-20 21:32:04,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 21:32:04,611 INFO L208 MainTranslator]: Completed translation [2022-03-20 21:32:04,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:04 WrapperNode [2022-03-20 21:32:04,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 21:32:04,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 21:32:04,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 21:32:04,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 21:32:04,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:04" (1/1) ... [2022-03-20 21:32:04,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:04" (1/1) ... [2022-03-20 21:32:04,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:04" (1/1) ... [2022-03-20 21:32:04,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:04" (1/1) ... [2022-03-20 21:32:04,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:04" (1/1) ... [2022-03-20 21:32:04,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:04" (1/1) ... [2022-03-20 21:32:04,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:04" (1/1) ... [2022-03-20 21:32:04,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 21:32:04,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 21:32:04,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 21:32:04,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 21:32:04,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:04" (1/1) ... [2022-03-20 21:32:04,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 21:32:04,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:32:04,672 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) [2022-03-20 21:32:04,677 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 [2022-03-20 21:32:04,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 21:32:04,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 21:32:04,695 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 21:32:04,695 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 21:32:04,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 21:32:04,696 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 21:32:04,696 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 21:32:04,696 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 21:32:04,696 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 21:32:04,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 21:32:04,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 21:32:04,697 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 21:32:04,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 21:32:04,697 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 21:32:04,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 21:32:04,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 21:32:04,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 21:32:04,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 21:32:04,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 21:32:04,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 21:32:04,736 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 21:32:04,737 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 21:32:04,860 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 21:32:04,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 21:32:04,864 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 21:32:04,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:32:04 BoogieIcfgContainer [2022-03-20 21:32:04,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 21:32:04,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 21:32:04,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 21:32:04,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 21:32:04,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:32:04" (1/3) ... [2022-03-20 21:32:04,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330a62f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:32:04, skipping insertion in model container [2022-03-20 21:32:04,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:04" (2/3) ... [2022-03-20 21:32:04,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330a62f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:32:04, skipping insertion in model container [2022-03-20 21:32:04,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:32:04" (3/3) ... [2022-03-20 21:32:04,876 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.c [2022-03-20 21:32:04,879 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 21:32:04,879 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 21:32:04,928 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 21:32:04,932 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 [2022-03-20 21:32:04,932 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 21:32:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 21:32:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 21:32:04,945 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:32:04,945 INFO L499 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] [2022-03-20 21:32:04,946 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:32:04,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:32:04,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-20 21:32:04,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:04,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [315831186] [2022-03-20 21:32:04,971 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:32:04,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 2 times [2022-03-20 21:32:04,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:32:04,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381503641] [2022-03-20 21:32:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:32:04,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:32:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 21:32:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 21:32:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 21:32:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 21:32:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 21:32:05,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:32:05,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381503641] [2022-03-20 21:32:05,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381503641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:05,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:05,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 21:32:05,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:32:05,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [315831186] [2022-03-20 21:32:05,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [315831186] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:05,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:05,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 21:32:05,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483751255] [2022-03-20 21:32:05,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:32:05,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 21:32:05,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:05,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 21:32:05,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 21:32:05,188 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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) [2022-03-20 21:32:05,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:32:05,268 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-20 21:32:05,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 21:32:05,270 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 [2022-03-20 21:32:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:32:05,277 INFO L225 Difference]: With dead ends: 69 [2022-03-20 21:32:05,277 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 21:32:05,279 INFO L912 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 [2022-03-20 21:32:05,282 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:32:05,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:32:05,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 21:32:05,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 21:32:05,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 21:32:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-20 21:32:05,318 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-20 21:32:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:32:05,318 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-20 21:32:05,318 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) [2022-03-20 21:32:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-20 21:32:05,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 21:32:05,320 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:32:05,320 INFO L499 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] [2022-03-20 21:32:05,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 21:32:05,321 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:32:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:32:05,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-20 21:32:05,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:05,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1715073941] [2022-03-20 21:32:05,323 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:32:05,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 2 times [2022-03-20 21:32:05,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:32:05,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189479156] [2022-03-20 21:32:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:32:05,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:32:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 21:32:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 21:32:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 21:32:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 21:32:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 21:32:05,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:32:05,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189479156] [2022-03-20 21:32:05,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189479156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:05,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:05,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:32:05,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:32:05,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1715073941] [2022-03-20 21:32:05,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1715073941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:05,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:05,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:32:05,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685543636] [2022-03-20 21:32:05,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:32:05,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 21:32:05,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:05,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 21:32:05,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 21:32:05,444 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 21:32:05,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:32:05,620 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 21:32:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 21:32:05,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 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 [2022-03-20 21:32:05,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:32:05,623 INFO L225 Difference]: With dead ends: 46 [2022-03-20 21:32:05,623 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 21:32:05,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 21:32:05,624 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:32:05,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:32:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 21:32:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 21:32:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 21:32:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 21:32:05,632 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-20 21:32:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:32:05,632 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 21:32:05,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 21:32:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 21:32:05,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 21:32:05,633 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:32:05,633 INFO L499 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] [2022-03-20 21:32:05,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 21:32:05,634 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:32:05,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:32:05,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-20 21:32:05,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:05,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [229972740] [2022-03-20 21:32:05,635 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:32:05,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 2 times [2022-03-20 21:32:05,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:32:05,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118026365] [2022-03-20 21:32:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:32:05,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:32:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 21:32:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 21:32:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 21:32:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 21:32:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 21:32:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:32:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 21:32:05,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:32:05,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118026365] [2022-03-20 21:32:05,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118026365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:05,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:05,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:32:05,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:32:05,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [229972740] [2022-03-20 21:32:05,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [229972740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:05,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:05,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:32:05,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727083167] [2022-03-20 21:32:05,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:32:05,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 21:32:05,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 21:32:05,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 21:32:05,718 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 21:32:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:32:05,866 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-20 21:32:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 21:32:05,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 33 [2022-03-20 21:32:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:32:05,867 INFO L225 Difference]: With dead ends: 50 [2022-03-20 21:32:05,868 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 21:32:05,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 21:32:05,869 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:32:05,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:32:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 21:32:05,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-20 21:32:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 21:32:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-20 21:32:05,876 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-20 21:32:05,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:32:05,876 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-20 21:32:05,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 21:32:05,876 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-20 21:32:05,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 21:32:05,877 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:32:05,877 INFO L499 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] [2022-03-20 21:32:05,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 21:32:05,877 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:32:05,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:32:05,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-20 21:32:05,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:05,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2030863282] [2022-03-20 21:32:05,878 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:32:05,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 2 times [2022-03-20 21:32:05,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:32:05,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834834665] [2022-03-20 21:32:05,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:32:05,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:32:05,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:32:05,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723298330] [2022-03-20 21:32:05,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:32:05,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:05,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:32:05,889 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) [2022-03-20 21:32:05,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 21:32:05,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:32:05,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:32:05,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 21:32:05,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:32:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 21:32:06,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:32:06,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:32:06,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834834665] [2022-03-20 21:32:06,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:32:06,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723298330] [2022-03-20 21:32:06,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723298330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:06,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:06,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:32:06,028 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:32:06,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2030863282] [2022-03-20 21:32:06,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2030863282] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:06,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:06,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:32:06,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462868976] [2022-03-20 21:32:06,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:32:06,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:32:06,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:06,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:32:06,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 21:32:06,030 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-03-20 21:32:06,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:32:06,076 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-20 21:32:06,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:32:06,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 38 [2022-03-20 21:32:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:32:06,077 INFO L225 Difference]: With dead ends: 69 [2022-03-20 21:32:06,077 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 21:32:06,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 21:32:06,078 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:32:06,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:32:06,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 21:32:06,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 21:32:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 21:32:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-20 21:32:06,088 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-20 21:32:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:32:06,107 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-20 21:32:06,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-03-20 21:32:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-20 21:32:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 21:32:06,108 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:32:06,108 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:32:06,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 21:32:06,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:06,327 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:32:06,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:32:06,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-20 21:32:06,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:06,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [300473466] [2022-03-20 21:32:06,328 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:32:06,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 2 times [2022-03-20 21:32:06,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:32:06,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134894333] [2022-03-20 21:32:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:32:06,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:32:06,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:32:06,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212587470] [2022-03-20 21:32:06,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:32:06,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:06,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:32:06,337 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) [2022-03-20 21:32:06,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 21:32:06,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:32:06,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:32:06,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 21:32:06,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:32:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 21:32:06,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:32:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 21:32:06,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:32:06,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134894333] [2022-03-20 21:32:06,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:32:06,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212587470] [2022-03-20 21:32:06,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212587470] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 21:32:06,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:32:06,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 21:32:06,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:32:06,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [300473466] [2022-03-20 21:32:06,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [300473466] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:06,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:06,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:32:06,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054314364] [2022-03-20 21:32:06,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:32:06,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 21:32:06,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:06,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 21:32:06,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 21:32:06,753 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 21:32:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:32:06,805 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-20 21:32:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:32:06,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-20 21:32:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:32:06,806 INFO L225 Difference]: With dead ends: 68 [2022-03-20 21:32:06,806 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 21:32:06,807 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 21:32:06,808 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:32:06,808 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:32:06,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 21:32:06,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-20 21:32:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 21:32:06,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-20 21:32:06,826 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-20 21:32:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:32:06,827 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-20 21:32:06,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 21:32:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-20 21:32:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 21:32:06,828 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:32:06,828 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:32:06,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 21:32:07,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:07,047 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:32:07,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:32:07,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-20 21:32:07,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:07,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1774283369] [2022-03-20 21:32:07,048 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:32:07,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 2 times [2022-03-20 21:32:07,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:32:07,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063546782] [2022-03-20 21:32:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:32:07,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:32:07,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:32:07,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719557037] [2022-03-20 21:32:07,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:32:07,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:07,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:32:07,056 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) [2022-03-20 21:32:07,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 21:32:07,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:32:07,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:32:07,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 21:32:07,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:32:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 21:32:07,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:32:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-20 21:32:07,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:32:07,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063546782] [2022-03-20 21:32:07,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:32:07,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719557037] [2022-03-20 21:32:07,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719557037] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 21:32:07,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:32:07,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 21:32:07,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:32:07,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1774283369] [2022-03-20 21:32:07,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1774283369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:07,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:07,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:32:07,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045436495] [2022-03-20 21:32:07,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:32:07,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:32:07,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:32:07,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 21:32:07,375 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 21:32:07,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:32:07,506 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-20 21:32:07,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:32:07,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-03-20 21:32:07,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:32:07,507 INFO L225 Difference]: With dead ends: 76 [2022-03-20 21:32:07,507 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 21:32:07,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 21:32:07,508 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:32:07,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:32:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 21:32:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-20 21:32:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 21:32:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-20 21:32:07,518 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-20 21:32:07,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:32:07,518 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-20 21:32:07,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 21:32:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-20 21:32:07,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 21:32:07,519 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:32:07,519 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:32:07,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 21:32:07,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:07,737 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:32:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:32:07,738 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-20 21:32:07,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:07,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1210793022] [2022-03-20 21:32:07,738 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:32:07,738 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 2 times [2022-03-20 21:32:07,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:32:07,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691298078] [2022-03-20 21:32:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:32:07,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:32:07,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:32:07,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707983636] [2022-03-20 21:32:07,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:32:07,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:07,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:32:07,747 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) [2022-03-20 21:32:07,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 21:32:07,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:32:07,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:32:07,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 21:32:07,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:32:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 21:32:07,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:32:07,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:32:07,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691298078] [2022-03-20 21:32:07,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:32:07,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707983636] [2022-03-20 21:32:07,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707983636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:07,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:07,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:32:07,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:32:07,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1210793022] [2022-03-20 21:32:07,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1210793022] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:07,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:07,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:32:07,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778386930] [2022-03-20 21:32:07,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:32:07,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:32:07,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:07,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:32:07,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 21:32:07,881 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 21:32:07,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:32:07,921 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-20 21:32:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:32:07,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-20 21:32:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:32:07,924 INFO L225 Difference]: With dead ends: 79 [2022-03-20 21:32:07,924 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 21:32:07,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 21:32:07,925 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:32:07,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:32:07,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 21:32:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-20 21:32:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 21:32:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-20 21:32:07,934 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-20 21:32:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:32:07,935 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-20 21:32:07,935 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 21:32:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-20 21:32:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 21:32:07,936 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:32:07,936 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:32:07,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 21:32:08,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:08,149 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:32:08,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:32:08,149 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-03-20 21:32:08,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:08,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [18872365] [2022-03-20 21:32:08,150 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:32:08,150 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 2 times [2022-03-20 21:32:08,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:32:08,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020971715] [2022-03-20 21:32:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:32:08,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:32:08,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:32:08,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829018430] [2022-03-20 21:32:08,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:32:08,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:08,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:32:08,160 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) [2022-03-20 21:32:08,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 21:32:08,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:32:08,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:32:08,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 21:32:08,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:32:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-20 21:32:08,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:32:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-20 21:32:13,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:32:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020971715] [2022-03-20 21:32:13,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:32:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829018430] [2022-03-20 21:32:13,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829018430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:32:13,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:32:13,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 21:32:13,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:32:13,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [18872365] [2022-03-20 21:32:13,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [18872365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:13,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:13,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 21:32:13,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213312302] [2022-03-20 21:32:13,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:32:13,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 21:32:13,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:13,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 21:32:13,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 21:32:13,124 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 21:32:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:32:13,315 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-03-20 21:32:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 21:32:13,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-03-20 21:32:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:32:13,317 INFO L225 Difference]: With dead ends: 135 [2022-03-20 21:32:13,317 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 21:32:13,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-20 21:32:13,318 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:32:13,319 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 326 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:32:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 21:32:13,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-03-20 21:32:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 21:32:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-03-20 21:32:13,329 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 75 [2022-03-20 21:32:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:32:13,330 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-03-20 21:32:13,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 21:32:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-03-20 21:32:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 21:32:13,331 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:32:13,331 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:32:13,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 21:32:13,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:13,531 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:32:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:32:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 3 times [2022-03-20 21:32:13,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:13,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [578887698] [2022-03-20 21:32:13,533 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:32:13,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 4 times [2022-03-20 21:32:13,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:32:13,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595403615] [2022-03-20 21:32:13,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:32:13,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:32:13,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:32:13,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590720535] [2022-03-20 21:32:13,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:32:13,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:13,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:32:13,548 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) [2022-03-20 21:32:13,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 21:32:13,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:32:13,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:32:13,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 21:32:13,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:32:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-20 21:32:13,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:32:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-20 21:32:15,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:32:15,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595403615] [2022-03-20 21:32:15,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:32:15,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590720535] [2022-03-20 21:32:15,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590720535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:32:15,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:32:15,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-20 21:32:15,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:32:15,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [578887698] [2022-03-20 21:32:15,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [578887698] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:15,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:15,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 21:32:15,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140197268] [2022-03-20 21:32:15,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:32:15,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 21:32:15,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:15,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 21:32:15,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 21:32:15,459 INFO L87 Difference]: Start difference. First operand 106 states and 125 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 21:32:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:32:15,570 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-03-20 21:32:15,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 21:32:15,571 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-20 21:32:15,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:32:15,571 INFO L225 Difference]: With dead ends: 133 [2022-03-20 21:32:15,572 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 21:32:15,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-20 21:32:15,572 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:32:15,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 265 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:32:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 21:32:15,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-20 21:32:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 21:32:15,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-03-20 21:32:15,585 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 80 [2022-03-20 21:32:15,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:32:15,585 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-03-20 21:32:15,585 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 21:32:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-03-20 21:32:15,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 21:32:15,586 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:32:15,586 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:32:15,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 21:32:15,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:15,800 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:32:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:32:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-03-20 21:32:15,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:15,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2025495704] [2022-03-20 21:32:15,801 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:32:15,801 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 2 times [2022-03-20 21:32:15,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:32:15,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428408165] [2022-03-20 21:32:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:32:15,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:32:15,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:32:15,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384403174] [2022-03-20 21:32:15,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:32:15,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:15,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:32:15,808 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) [2022-03-20 21:32:15,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 21:32:15,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:32:15,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:32:15,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 21:32:15,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:32:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 21:32:16,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:32:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 21:32:27,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:32:27,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428408165] [2022-03-20 21:32:27,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:32:27,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384403174] [2022-03-20 21:32:27,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384403174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:32:27,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:32:27,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-20 21:32:27,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:32:27,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2025495704] [2022-03-20 21:32:27,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2025495704] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:32:27,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:32:27,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 21:32:27,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394527149] [2022-03-20 21:32:27,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:32:27,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 21:32:27,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:27,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 21:32:27,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-20 21:32:27,551 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 21:32:28,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:32:28,765 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2022-03-20 21:32:28,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 21:32:28,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-03-20 21:32:28,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:32:28,766 INFO L225 Difference]: With dead ends: 116 [2022-03-20 21:32:28,766 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 21:32:28,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-03-20 21:32:28,767 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:32:28,768 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 342 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 21:32:28,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 21:32:28,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 21:32:28,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 21:32:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2022-03-20 21:32:28,774 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 86 [2022-03-20 21:32:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:32:28,775 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2022-03-20 21:32:28,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 21:32:28,775 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2022-03-20 21:32:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 21:32:28,776 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:32:28,776 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:32:28,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 21:32:28,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:28,991 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:32:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:32:28,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 5 times [2022-03-20 21:32:28,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:32:28,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1934500994] [2022-03-20 21:32:28,992 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:32:28,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 6 times [2022-03-20 21:32:28,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:32:28,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818257991] [2022-03-20 21:32:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:32:28,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:32:29,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:32:29,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128381394] [2022-03-20 21:32:29,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:32:29,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:32:29,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:32:29,012 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) [2022-03-20 21:32:29,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 21:32:29,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 21:32:29,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:32:29,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 21:32:29,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:32:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 21:32:41,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:33:33,949 WARN L232 SmtUtils]: Spent 27.95s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 21:34:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 21:34:41,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:34:41,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818257991] [2022-03-20 21:34:41,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:34:41,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128381394] [2022-03-20 21:34:41,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128381394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:34:41,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:34:41,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2022-03-20 21:34:41,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:34:41,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1934500994] [2022-03-20 21:34:41,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1934500994] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:34:41,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:34:41,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 21:34:41,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838350326] [2022-03-20 21:34:41,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:34:41,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 21:34:41,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:34:41,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 21:34:41,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=162, Unknown=2, NotChecked=0, Total=210 [2022-03-20 21:34:41,777 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 21:34:46,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:34:46,191 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-03-20 21:34:46,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 21:34:46,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2022-03-20 21:34:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:34:46,193 INFO L225 Difference]: With dead ends: 112 [2022-03-20 21:34:46,193 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 21:34:46,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=59, Invalid=209, Unknown=4, NotChecked=0, Total=272 [2022-03-20 21:34:46,194 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:34:46,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 259 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 21:34:46,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 21:34:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-20 21:34:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.11864406779661) internal successors, (66), 63 states have internal predecessors, (66), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 21:34:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2022-03-20 21:34:46,207 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 92 [2022-03-20 21:34:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:34:46,208 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2022-03-20 21:34:46,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 21:34:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2022-03-20 21:34:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 21:34:46,210 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:34:46,210 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 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] [2022-03-20 21:34:46,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 21:34:46,423 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,SelfDestructingSolverStorable10 [2022-03-20 21:34:46,423 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:34:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:34:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 7 times [2022-03-20 21:34:46,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:34:46,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [875630756] [2022-03-20 21:34:46,424 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:34:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 8 times [2022-03-20 21:34:46,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:34:46,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47764390] [2022-03-20 21:34:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:34:46,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:34:46,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:34:46,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506973986] [2022-03-20 21:34:46,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:34:46,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:34:46,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:34:46,432 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) [2022-03-20 21:34:46,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 21:34:46,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:34:46,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:34:46,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 21:34:46,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:34:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-20 21:34:46,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:34:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-20 21:34:49,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:34:49,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47764390] [2022-03-20 21:34:49,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:34:49,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506973986] [2022-03-20 21:34:49,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506973986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:34:49,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:34:49,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 21:34:49,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:34:49,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [875630756] [2022-03-20 21:34:49,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [875630756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:34:49,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:34:49,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 21:34:49,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003206883] [2022-03-20 21:34:49,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:34:49,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 21:34:49,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:34:49,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 21:34:49,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-20 21:34:49,186 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 21:34:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:34:49,398 INFO L93 Difference]: Finished difference Result 177 states and 223 transitions. [2022-03-20 21:34:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 21:34:49,398 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2022-03-20 21:34:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:34:49,399 INFO L225 Difference]: With dead ends: 177 [2022-03-20 21:34:49,399 INFO L226 Difference]: Without dead ends: 138 [2022-03-20 21:34:49,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-20 21:34:49,400 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:34:49,401 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 400 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:34:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-20 21:34:49,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-03-20 21:34:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 88 states have internal predecessors, (92), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 21:34:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-03-20 21:34:49,412 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 97 [2022-03-20 21:34:49,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:34:49,412 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-03-20 21:34:49,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 21:34:49,412 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-03-20 21:34:49,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 21:34:49,413 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:34:49,413 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:34:49,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 21:34:49,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:34:49,619 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:34:49,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:34:49,620 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 9 times [2022-03-20 21:34:49,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:34:49,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438889789] [2022-03-20 21:34:49,620 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:34:49,620 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 10 times [2022-03-20 21:34:49,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:34:49,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981356555] [2022-03-20 21:34:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:34:49,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:34:49,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:34:49,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547037435] [2022-03-20 21:34:49,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:34:49,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:34:49,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:34:49,629 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) [2022-03-20 21:34:49,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 21:34:49,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:34:49,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:34:49,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 21:34:49,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:34:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-03-20 21:34:50,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:35:13,469 WARN L232 SmtUtils]: Spent 5.34s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 21:35:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-20 21:35:52,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:35:52,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981356555] [2022-03-20 21:35:52,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:35:52,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547037435] [2022-03-20 21:35:52,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547037435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:35:52,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:35:52,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2022-03-20 21:35:52,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:35:52,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438889789] [2022-03-20 21:35:52,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438889789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:35:52,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:35:52,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 21:35:52,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430320126] [2022-03-20 21:35:52,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:35:52,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 21:35:52,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:35:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 21:35:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=402, Unknown=1, NotChecked=0, Total=506 [2022-03-20 21:35:52,269 INFO L87 Difference]: Start difference. First operand 138 states and 167 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 21:35:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:35:52,889 INFO L93 Difference]: Finished difference Result 184 states and 208 transitions. [2022-03-20 21:35:52,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 21:35:52,890 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 105 [2022-03-20 21:35:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:35:52,891 INFO L225 Difference]: With dead ends: 184 [2022-03-20 21:35:52,891 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 21:35:52,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=111, Invalid=488, Unknown=1, NotChecked=0, Total=600 [2022-03-20 21:35:52,892 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 25 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:35:52,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 490 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:35:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 21:35:52,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-20 21:35:52,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 93 states have (on average 1.086021505376344) internal successors, (101), 98 states have internal predecessors, (101), 36 states have call successors, (36), 22 states have call predecessors, (36), 21 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 21:35:52,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 170 transitions. [2022-03-20 21:35:52,903 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 170 transitions. Word has length 105 [2022-03-20 21:35:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:35:52,904 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 170 transitions. [2022-03-20 21:35:52,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 21:35:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 170 transitions. [2022-03-20 21:35:52,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 21:35:52,904 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:35:52,905 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2022-03-20 21:35:52,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 21:35:53,115 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,SelfDestructingSolverStorable12 [2022-03-20 21:35:53,115 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:35:53,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:35:53,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 11 times [2022-03-20 21:35:53,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:35:53,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [22185023] [2022-03-20 21:35:53,116 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:35:53,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 12 times [2022-03-20 21:35:53,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:35:53,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897021674] [2022-03-20 21:35:53,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:35:53,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:35:53,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:35:53,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910624956] [2022-03-20 21:35:53,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:35:53,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:35:53,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:35:53,124 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) [2022-03-20 21:35:53,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 21:35:53,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 21:35:53,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:35:53,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 21:35:53,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:35:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 96 proven. 4 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2022-03-20 21:35:53,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:35:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 71 proven. 4 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 21:35:54,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:35:54,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897021674] [2022-03-20 21:35:54,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:35:54,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910624956] [2022-03-20 21:35:54,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910624956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:35:54,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:35:54,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-20 21:35:54,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:35:54,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [22185023] [2022-03-20 21:35:54,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [22185023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:35:54,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:35:54,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 21:35:54,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095581439] [2022-03-20 21:35:54,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:35:54,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 21:35:54,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:35:54,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 21:35:54,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-20 21:35:54,948 INFO L87 Difference]: Start difference. First operand 151 states and 170 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 21:35:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:35:55,345 INFO L93 Difference]: Finished difference Result 172 states and 193 transitions. [2022-03-20 21:35:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 21:35:55,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 114 [2022-03-20 21:35:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:35:55,347 INFO L225 Difference]: With dead ends: 172 [2022-03-20 21:35:55,347 INFO L226 Difference]: Without dead ends: 160 [2022-03-20 21:35:55,347 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 200 SyntacticMatches, 14 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-20 21:35:55,347 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 20 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:35:55,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 324 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 233 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-03-20 21:35:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-20 21:35:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-03-20 21:35:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 103 states have internal predecessors, (106), 38 states have call successors, (38), 23 states have call predecessors, (38), 22 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 21:35:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 179 transitions. [2022-03-20 21:35:55,360 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 179 transitions. Word has length 114 [2022-03-20 21:35:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:35:55,361 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 179 transitions. [2022-03-20 21:35:55,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 21:35:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 179 transitions. [2022-03-20 21:35:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 21:35:55,361 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:35:55,362 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:35:55,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 21:35:55,575 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,SelfDestructingSolverStorable13 [2022-03-20 21:35:55,575 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:35:55,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:35:55,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 3 times [2022-03-20 21:35:55,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:35:55,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1173716737] [2022-03-20 21:35:55,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:35:55,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 4 times [2022-03-20 21:35:55,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:35:55,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705662859] [2022-03-20 21:35:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:35:55,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:35:55,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:35:55,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239845997] [2022-03-20 21:35:55,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:35:55,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:35:55,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:35:55,583 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) [2022-03-20 21:35:55,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 21:35:55,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:35:55,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:35:55,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 21:35:55,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:35:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 40 proven. 24 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2022-03-20 21:35:56,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:36:05,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:36:05,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705662859] [2022-03-20 21:36:05,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:36:05,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239845997] [2022-03-20 21:36:05,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239845997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:36:05,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:36:05,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 21:36:05,075 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:36:05,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1173716737] [2022-03-20 21:36:05,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1173716737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:36:05,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:36:05,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 21:36:05,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987044273] [2022-03-20 21:36:05,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:36:05,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 21:36:05,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:36:05,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 21:36:05,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-03-20 21:36:05,077 INFO L87 Difference]: Start difference. First operand 159 states and 179 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 21:36:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:36:06,554 INFO L93 Difference]: Finished difference Result 200 states and 233 transitions. [2022-03-20 21:36:06,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 21:36:06,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 116 [2022-03-20 21:36:06,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:36:06,555 INFO L225 Difference]: With dead ends: 200 [2022-03-20 21:36:06,555 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 21:36:06,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2022-03-20 21:36:06,556 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 23 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:36:06,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 439 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 21:36:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 21:36:06,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2022-03-20 21:36:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 77 states have internal predecessors, (80), 29 states have call successors, (29), 18 states have call predecessors, (29), 17 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 21:36:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2022-03-20 21:36:06,569 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 116 [2022-03-20 21:36:06,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:36:06,570 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2022-03-20 21:36:06,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 21:36:06,570 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2022-03-20 21:36:06,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 21:36:06,571 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:36:06,571 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-03-20 21:36:06,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 21:36:06,778 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,SelfDestructingSolverStorable14 [2022-03-20 21:36:06,778 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:36:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:36:06,778 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 13 times [2022-03-20 21:36:06,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:36:06,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [94927560] [2022-03-20 21:36:06,779 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:36:06,779 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 14 times [2022-03-20 21:36:06,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:36:06,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187000114] [2022-03-20 21:36:06,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:36:06,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:36:06,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:36:06,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111874431] [2022-03-20 21:36:06,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:36:06,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:36:06,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:36:06,792 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) [2022-03-20 21:36:06,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 21:36:06,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:36:06,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:36:06,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 21:36:06,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:36:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 51 proven. 26 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2022-03-20 21:36:07,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:36:20,983 WARN L855 $PredicateComparison]: unable to prove that (<= 0 (div (let ((.cse0 (mod c_main_~A~0 4294967296))) (+ (div .cse0 8) (* (- 1) (div (+ (- 1) (* (- 1) .cse0)) (- 6))) 1)) 4294967296)) is different from true [2022-03-20 21:36:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 36 proven. 41 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2022-03-20 21:36:25,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:36:25,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187000114] [2022-03-20 21:36:25,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:36:25,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111874431] [2022-03-20 21:36:25,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111874431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:36:25,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:36:25,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-03-20 21:36:25,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:36:25,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [94927560] [2022-03-20 21:36:25,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [94927560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:36:25,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:36:25,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 21:36:25,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9269771] [2022-03-20 21:36:25,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:36:25,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 21:36:25,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:36:25,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 21:36:25,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=356, Unknown=1, NotChecked=40, Total=506 [2022-03-20 21:36:25,421 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 21:36:26,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:36:26,760 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2022-03-20 21:36:26,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 21:36:26,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 122 [2022-03-20 21:36:26,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:36:26,762 INFO L225 Difference]: With dead ends: 146 [2022-03-20 21:36:26,762 INFO L226 Difference]: Without dead ends: 118 [2022-03-20 21:36:26,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=217, Invalid=716, Unknown=1, NotChecked=58, Total=992 [2022-03-20 21:36:26,762 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 33 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:36:26,763 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 444 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 21:36:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-20 21:36:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2022-03-20 21:36:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 26 states have call successors, (26), 17 states have call predecessors, (26), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 21:36:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2022-03-20 21:36:26,782 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 122 [2022-03-20 21:36:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:36:26,782 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2022-03-20 21:36:26,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 21:36:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2022-03-20 21:36:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 21:36:26,783 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:36:26,783 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 21:36:26,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 21:36:26,999 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,SelfDestructingSolverStorable15 [2022-03-20 21:36:26,999 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:36:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:36:27,000 INFO L85 PathProgramCache]: Analyzing trace with hash -523768505, now seen corresponding path program 1 times [2022-03-20 21:36:27,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:36:27,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1227301409] [2022-03-20 21:36:27,000 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:36:27,000 INFO L85 PathProgramCache]: Analyzing trace with hash -523768505, now seen corresponding path program 2 times [2022-03-20 21:36:27,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:36:27,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738052437] [2022-03-20 21:36:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:36:27,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:36:27,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:36:27,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176594267] [2022-03-20 21:36:27,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:36:27,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:36:27,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:36:27,007 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) [2022-03-20 21:36:27,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 21:36:27,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:36:27,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:36:27,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 21:36:27,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:36:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-03-20 21:36:27,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:36:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-20 21:36:44,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:36:44,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738052437] [2022-03-20 21:36:44,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:36:44,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176594267] [2022-03-20 21:36:44,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176594267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:36:44,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:36:44,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2022-03-20 21:36:44,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:36:44,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1227301409] [2022-03-20 21:36:44,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1227301409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:36:44,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:36:44,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 21:36:44,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489100788] [2022-03-20 21:36:44,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:36:44,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 21:36:44,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:36:44,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 21:36:44,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-03-20 21:36:44,373 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-20 21:36:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:36:45,184 INFO L93 Difference]: Finished difference Result 171 states and 201 transitions. [2022-03-20 21:36:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 21:36:45,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) Word has length 127 [2022-03-20 21:36:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:36:45,185 INFO L225 Difference]: With dead ends: 171 [2022-03-20 21:36:45,185 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 21:36:45,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2022-03-20 21:36:45,186 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 35 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:36:45,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 639 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 21:36:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 21:36:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-20 21:36:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 92 states have (on average 1.065217391304348) internal successors, (98), 96 states have internal predecessors, (98), 39 states have call successors, (39), 20 states have call predecessors, (39), 19 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 21:36:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2022-03-20 21:36:45,205 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 127 [2022-03-20 21:36:45,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:36:45,205 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2022-03-20 21:36:45,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-20 21:36:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2022-03-20 21:36:45,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 21:36:45,206 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:36:45,206 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 21:36:45,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 21:36:45,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:36:45,419 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:36:45,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:36:45,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1932789221, now seen corresponding path program 3 times [2022-03-20 21:36:45,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:36:45,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [997516973] [2022-03-20 21:36:45,420 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:36:45,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1932789221, now seen corresponding path program 4 times [2022-03-20 21:36:45,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:36:45,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150832348] [2022-03-20 21:36:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:36:45,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:36:45,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:36:45,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669688356] [2022-03-20 21:36:45,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:36:45,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:36:45,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:36:45,429 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) [2022-03-20 21:36:45,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 21:36:45,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:36:45,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:36:45,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 21:36:45,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:36:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2022-03-20 21:36:46,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:37:54,996 WARN L232 SmtUtils]: Spent 7.97s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 21:38:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2022-03-20 21:38:41,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:38:41,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150832348] [2022-03-20 21:38:41,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:38:41,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669688356] [2022-03-20 21:38:41,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669688356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:38:41,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:38:41,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 26 [2022-03-20 21:38:41,091 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:38:41,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [997516973] [2022-03-20 21:38:41,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [997516973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:38:41,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:38:41,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 21:38:41,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784858542] [2022-03-20 21:38:41,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:38:41,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 21:38:41,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:38:41,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 21:38:41,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-03-20 21:38:41,092 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-03-20 21:38:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:38:42,338 INFO L93 Difference]: Finished difference Result 180 states and 197 transitions. [2022-03-20 21:38:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 21:38:42,338 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 135 [2022-03-20 21:38:42,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:38:42,339 INFO L225 Difference]: With dead ends: 180 [2022-03-20 21:38:42,339 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 21:38:42,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-03-20 21:38:42,340 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 21:38:42,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 561 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 21:38:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 21:38:42,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-20 21:38:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 112 states have internal predecessors, (114), 38 states have call successors, (38), 26 states have call predecessors, (38), 25 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 21:38:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 187 transitions. [2022-03-20 21:38:42,359 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 187 transitions. Word has length 135 [2022-03-20 21:38:42,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:38:42,359 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 187 transitions. [2022-03-20 21:38:42,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-03-20 21:38:42,359 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 187 transitions. [2022-03-20 21:38:42,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 21:38:42,360 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:38:42,360 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2022-03-20 21:38:42,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 21:38:42,572 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,SelfDestructingSolverStorable17 [2022-03-20 21:38:42,572 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:38:42,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:38:42,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1246986233, now seen corresponding path program 5 times [2022-03-20 21:38:42,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:38:42,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [67165418] [2022-03-20 21:38:42,572 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:38:42,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1246986233, now seen corresponding path program 6 times [2022-03-20 21:38:42,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:38:42,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451864936] [2022-03-20 21:38:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:38:42,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:38:42,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:38:42,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599448676] [2022-03-20 21:38:42,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:38:42,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:38:42,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:38:42,579 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:38:42,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 21:38:42,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 21:38:42,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:38:42,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 21:38:42,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:38:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 461 proven. 3 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2022-03-20 21:38:43,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:38:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 63 proven. 33 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2022-03-20 21:38:43,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:38:43,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451864936] [2022-03-20 21:38:43,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:38:43,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599448676] [2022-03-20 21:38:43,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599448676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:38:43,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:38:43,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-20 21:38:43,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:38:43,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [67165418] [2022-03-20 21:38:43,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [67165418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:38:43,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:38:43,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 21:38:43,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727279758] [2022-03-20 21:38:43,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:38:43,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 21:38:43,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:38:43,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 21:38:43,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-20 21:38:43,806 INFO L87 Difference]: Start difference. First operand 173 states and 187 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 21:38:44,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:38:44,209 INFO L93 Difference]: Finished difference Result 179 states and 192 transitions. [2022-03-20 21:38:44,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 21:38:44,210 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 144 [2022-03-20 21:38:44,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:38:44,211 INFO L225 Difference]: With dead ends: 179 [2022-03-20 21:38:44,211 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 21:38:44,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-03-20 21:38:44,211 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 31 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:38:44,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 265 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:38:44,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 21:38:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-03-20 21:38:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.0) internal successors, (78), 78 states have internal predecessors, (78), 26 states have call successors, (26), 20 states have call predecessors, (26), 18 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 21:38:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2022-03-20 21:38:44,226 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 144 [2022-03-20 21:38:44,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:38:44,226 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2022-03-20 21:38:44,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 21:38:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2022-03-20 21:38:44,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 21:38:44,227 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:38:44,227 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:38:44,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 21:38:44,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:38:44,439 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:38:44,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:38:44,439 INFO L85 PathProgramCache]: Analyzing trace with hash 667564579, now seen corresponding path program 1 times [2022-03-20 21:38:44,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:38:44,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1433272487] [2022-03-20 21:38:44,439 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:38:44,444 INFO L85 PathProgramCache]: Analyzing trace with hash 667564579, now seen corresponding path program 2 times [2022-03-20 21:38:44,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:38:44,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932799813] [2022-03-20 21:38:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:38:44,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:38:44,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:38:44,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535856709] [2022-03-20 21:38:44,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:38:44,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:38:44,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:38:44,459 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:38:44,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 21:38:44,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:38:44,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:38:44,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 21:38:44,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:38:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 40 proven. 63 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2022-03-20 21:38:46,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:38:48,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:38:48,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932799813] [2022-03-20 21:38:48,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:38:48,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535856709] [2022-03-20 21:38:48,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535856709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:38:48,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:38:48,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 21:38:48,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:38:48,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1433272487] [2022-03-20 21:38:48,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1433272487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:38:48,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:38:48,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:38:48,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427116918] [2022-03-20 21:38:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:38:48,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:38:48,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:38:48,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:38:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:38:48,235 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-03-20 21:38:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:38:50,082 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-03-20 21:38:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 21:38:50,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) Word has length 146 [2022-03-20 21:38:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:38:50,084 INFO L225 Difference]: With dead ends: 123 [2022-03-20 21:38:50,084 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 21:38:50,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-03-20 21:38:50,084 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 23 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 21:38:50,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 380 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 21:38:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 21:38:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 21:38:50,085 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) [2022-03-20 21:38:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 21:38:50,085 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 146 [2022-03-20 21:38:50,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:38:50,085 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 21:38:50,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-03-20 21:38:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 21:38:50,085 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 21:38:50,087 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 21:38:50,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 21:38:50,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:38:50,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 21:39:06,081 WARN L232 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 245 DAG size of output: 118 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 21:39:13,765 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-20 21:39:13,765 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-20 21:39:13,765 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-20 21:39:13,765 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-20 21:39:13,765 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-20 21:39:13,765 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 21:39:13,765 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 21:39:13,765 INFO L878 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (and (<= 1 (mod main_~B~0 4294967296)) (<= (mod main_~A~0 4294967296) 5)) [2022-03-20 21:39:13,765 INFO L878 garLoopResultBuilder]: At program point L60(line 60) the Hoare annotation is: (and (= main_~d~0 (mod main_~B~0 4294967296)) (= main_~p~0 1)) [2022-03-20 21:39:13,765 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 63) the Hoare annotation is: true [2022-03-20 21:39:13,766 INFO L878 garLoopResultBuilder]: At program point L54(lines 54 57) the Hoare annotation is: (let ((.cse2 (mod main_~A~0 4294967296)) (.cse12 (* (- 1) main_~r~0))) (let ((.cse9 (div (+ .cse2 .cse12) 2)) (.cse7 (mod main_~B~0 4294967296))) (let ((.cse3 (* 2 .cse7)) (.cse5 (< (* main_~r~0 2) .cse2)) (.cse6 (= main_~p~0 1)) (.cse10 (<= (* .cse7 4) .cse2)) (.cse0 (= main_~d~0 .cse9)) (.cse11 (= main_~q~0 4)) (.cse1 (= (+ main_~r~0 (* main_~q~0 .cse7)) .cse2)) (.cse13 (* main_~d~0 2)) (.cse4 (<= .cse2 5)) (.cse8 (= main_~q~0 0))) (or (and (<= 0 main_~r~0) .cse0 .cse1 (= .cse2 (+ main_~r~0 .cse3)) .cse4 .cse5 .cse6) (and (= main_~d~0 .cse7) (< main_~r~0 .cse3) .cse1 .cse8 (<= .cse7 main_~r~0) .cse6) (and (= main_~d~0 (div .cse9 2)) .cse10 .cse1 .cse4 .cse11 .cse5 .cse6) (and (= main_~p~0 2) .cse10 .cse0 .cse1 .cse11 (<= (div (+ (* (- 2) main_~d~0) 5 .cse12) (- 4294967296)) (div (+ main_~r~0 .cse13) 4294967296)) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and (= main_~d~0 (* main_~p~0 .cse7)) .cse1 (< main_~r~0 .cse13) .cse4 .cse8 (= (mod main_~p~0 2) 0) (<= main_~d~0 main_~r~0)))))) [2022-03-20 21:39:13,766 INFO L878 garLoopResultBuilder]: At program point L54-2(lines 22 63) the Hoare annotation is: (let ((.cse8 (mod main_~B~0 4294967296))) (let ((.cse19 (* (- 1) main_~d~0)) (.cse24 (+ main_~d~0 main_~r~0)) (.cse26 (* (- 1) main_~r~0)) (.cse25 (* .cse8 4)) (.cse5 (mod main_~A~0 4294967296)) (.cse9 (* 8 .cse8))) (let ((.cse12 (< .cse5 .cse9)) (.cse13 (= .cse25 main_~d~0)) (.cse16 (= main_~p~0 4)) (.cse3 (div (+ .cse5 .cse26) 2)) (.cse2 (<= .cse25 .cse5)) (.cse7 (= main_~q~0 4)) (.cse17 (< main_~r~0 main_~d~0)) (.cse1 (= main_~p~0 2)) (.cse14 (= .cse24 .cse5)) (.cse6 (* main_~r~0 2)) (.cse22 (* main_~d~0 2)) (.cse10 (div (+ .cse19 .cse5 .cse26) 2)) (.cse20 (= main_~d~0 .cse8)) (.cse0 (<= 0 main_~r~0)) (.cse23 (* 2 .cse8)) (.cse11 (= main_~p~0 1)) (.cse21 (= main_~d~0 (* main_~p~0 .cse8))) (.cse15 (= (+ main_~r~0 (* main_~q~0 .cse8)) .cse5)) (.cse4 (<= .cse5 5)) (.cse18 (= main_~q~0 0))) (or (and .cse0 .cse1 .cse2 (= main_~d~0 .cse3) .cse4 (= (mod (div (- (div (+ (* (- 2) .cse5) .cse6) (- 2))) (- 2)) 2) 0) .cse7 (< (div (+ (* (- 4) .cse8) 5) (- 4294967296)) (+ (div (+ (- 1) .cse9) 4294967296) 1)) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and (= (+ main_~p~0 4) main_~q~0) .cse0 .cse4 (= .cse5 (+ (* 5 .cse8) main_~r~0)) (= (div .cse10 2) main_~d~0) .cse11 .cse12) (and .cse13 .cse14 .cse2 .cse15 .cse4 .cse16 .cse12) (and .cse17 .cse13 .cse15 .cse4 .cse18 .cse16 (<= (div .cse19 (- 2)) main_~r~0)) (and .cse20 .cse15 .cse18 .cse11) (and (= main_~d~0 (div .cse3 2)) (not (<= .cse9 .cse5)) .cse2 .cse15 .cse4 .cse7 .cse11) (and .cse17 .cse21 .cse1 .cse15 .cse18 (<= .cse8 main_~r~0)) (and (< .cse5 .cse22) .cse0 .cse1 (= (mod (div (* (- 2) main_~d~0) (- 2)) 2) 0) .cse14 .cse15 .cse4 (<= .cse23 .cse24) (< .cse24 .cse25)) (and .cse20 (= .cse5 (+ main_~r~0 .cse8)) (= main_~q~0 1) (<= .cse8 .cse24) (< .cse5 .cse23) .cse11) (and (< (+ .cse6 .cse22) .cse5) (= main_~q~0 3) .cse0 (= main_~d~0 .cse10) (= (+ main_~r~0 (* 3 .cse8)) .cse5) .cse4 .cse11) (and .cse20 .cse0 (< main_~r~0 .cse23) .cse15 (= .cse5 (+ main_~r~0 .cse23)) .cse4 .cse11) (and .cse21 (<= 1 .cse8) .cse15 (= .cse9 main_~d~0) .cse4 .cse18 (<= .cse25 main_~r~0)))))) [2022-03-20 21:39:13,766 INFO L878 garLoopResultBuilder]: At program point L48(lines 46 58) the Hoare annotation is: (let ((.cse8 (mod main_~B~0 4294967296))) (let ((.cse19 (+ main_~d~0 main_~r~0)) (.cse25 (* .cse8 4)) (.cse9 (* 8 .cse8)) (.cse23 (* (- 1) main_~d~0)) (.cse5 (mod main_~A~0 4294967296)) (.cse26 (* (- 1) main_~r~0))) (let ((.cse6 (* main_~r~0 2)) (.cse14 (div (+ .cse23 .cse5 .cse26) 2)) (.cse16 (< .cse5 .cse9)) (.cse11 (< main_~r~0 main_~d~0)) (.cse20 (= .cse25 main_~d~0)) (.cse22 (= main_~p~0 4)) (.cse3 (div (+ .cse5 .cse26) 2)) (.cse2 (<= .cse25 .cse5)) (.cse7 (= main_~q~0 4)) (.cse17 (* main_~d~0 2)) (.cse1 (= main_~p~0 2)) (.cse21 (= .cse19 .cse5)) (.cse18 (= main_~d~0 .cse8)) (.cse0 (<= 0 main_~r~0)) (.cse10 (* 2 .cse8)) (.cse15 (= main_~p~0 1)) (.cse24 (= main_~d~0 (* main_~p~0 .cse8))) (.cse12 (= (+ main_~r~0 (* main_~q~0 .cse8)) .cse5)) (.cse4 (<= .cse5 5)) (.cse13 (= main_~q~0 0))) (or (and .cse0 .cse1 .cse2 (= main_~d~0 .cse3) .cse4 (= (mod (div (- (div (+ (* (- 2) .cse5) .cse6) (- 2))) (- 2)) 2) 0) .cse7 (< (div (+ (* (- 4) .cse8) 5) (- 4294967296)) (+ (div (+ (- 1) .cse9) 4294967296) 1)) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and (= main_~d~0 .cse10) .cse11 .cse1 .cse12 .cse13 (<= .cse8 main_~r~0)) (and (= (+ main_~p~0 4) main_~q~0) .cse0 .cse4 (= .cse5 (+ (* 5 .cse8) main_~r~0)) (= (div .cse14 2) main_~d~0) .cse15 .cse16) (and (< (+ .cse6 .cse17) .cse5) .cse0 (= main_~d~0 .cse14) .cse12 (= (+ main_~r~0 (* 3 .cse8)) .cse5) .cse4 .cse15) (and .cse18 (= .cse5 (+ (* (mod main_~d~0 4294967296) main_~q~0) main_~r~0)) (= main_~q~0 1) (<= .cse8 .cse19) (< .cse5 .cse10) .cse15) (and .cse20 .cse21 .cse2 .cse12 .cse4 .cse22 .cse16) (and .cse11 .cse20 .cse12 .cse4 .cse13 .cse22 (<= (div .cse23 (- 2)) main_~r~0)) (and (= main_~d~0 (div .cse3 2)) (not (<= .cse9 .cse5)) .cse2 .cse12 .cse4 .cse7 .cse15) (and .cse24 .cse12 .cse13 .cse15) (and (< .cse5 .cse17) .cse0 .cse1 (= (mod (div (* (- 2) main_~d~0) (- 2)) 2) 0) .cse21 .cse12 .cse4 (<= .cse10 .cse19) (< .cse19 .cse25)) (and .cse18 .cse0 (< main_~r~0 .cse10) .cse12 (= .cse5 (+ main_~r~0 .cse10)) .cse4 .cse15) (and .cse24 (<= 1 .cse8) .cse12 (= .cse9 main_~d~0) .cse4 .cse13 (<= .cse25 main_~r~0)))))) [2022-03-20 21:39:13,766 INFO L878 garLoopResultBuilder]: At program point L46-1(lines 46 58) the Hoare annotation is: (let ((.cse3 (mod main_~B~0 4294967296)) (.cse2 (mod main_~A~0 4294967296)) (.cse10 (* (- 1) main_~r~0))) (let ((.cse4 (div (+ (* (- 1) main_~d~0) .cse2 .cse10) 2)) (.cse6 (* 8 .cse3)) (.cse8 (= main_~d~0 .cse3)) (.cse0 (<= 0 main_~r~0)) (.cse7 (= (+ main_~r~0 (* main_~q~0 .cse3)) .cse2)) (.cse9 (* 2 .cse3)) (.cse1 (<= .cse2 5)) (.cse5 (= main_~p~0 1))) (or (and (= (+ main_~p~0 4) main_~q~0) .cse0 .cse1 (= .cse2 (+ (* 5 .cse3) main_~r~0)) (= (div .cse4 2) main_~d~0) .cse5 (< .cse2 .cse6)) (and (< (+ (* main_~r~0 2) (* main_~d~0 2)) .cse2) .cse0 (= main_~d~0 .cse4) .cse7 (= (+ main_~r~0 (* 3 .cse3)) .cse2) .cse1 .cse5) (and .cse8 (= .cse2 (+ (* (mod main_~d~0 4294967296) main_~q~0) main_~r~0)) (= main_~q~0 1) (<= .cse3 (+ main_~d~0 main_~r~0)) (< .cse2 .cse9) .cse5) (and (= main_~d~0 (div (div (+ .cse2 .cse10) 2) 2)) (not (<= .cse6 .cse2)) (<= (* .cse3 4) .cse2) .cse7 .cse1 (= main_~q~0 4) .cse5) (and (= main_~d~0 (* main_~p~0 .cse3)) .cse7 (= main_~q~0 0) .cse5) (and .cse8 .cse0 (< main_~r~0 .cse9) .cse7 (= .cse2 (+ main_~r~0 .cse9)) .cse1 .cse5)))) [2022-03-20 21:39:13,766 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 63) the Hoare annotation is: true [2022-03-20 21:39:13,766 INFO L878 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (let ((.cse6 (mod main_~A~0 4294967296)) (.cse5 (mod main_~B~0 4294967296))) (let ((.cse4 (= main_~d~0 (* main_~p~0 .cse5))) (.cse1 (= (+ main_~r~0 (* main_~q~0 .cse5)) .cse6)) (.cse2 (<= .cse6 5)) (.cse3 (= main_~q~0 0)) (.cse0 (* .cse5 4))) (or (and (= .cse0 main_~d~0) (< (div (div (div (+ main_~d~0 (- 4)) 2) 2) (- 4294967296)) 1) .cse1 .cse2 .cse3 (= main_~p~0 4) (<= (div (* (- 1) main_~d~0) (- 2)) main_~r~0)) (and .cse4 .cse1 (< (div (+ (- 1) main_~d~0) (- 4294967296)) 1) .cse2 .cse3 (= main_~p~0 1)) (and .cse4 (= main_~p~0 2) .cse1 .cse2 .cse3 (<= .cse5 main_~r~0) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and .cse4 (<= 1 .cse5) .cse1 (= (* 8 .cse5) main_~d~0) .cse2 .cse3 (<= .cse0 main_~r~0))))) [2022-03-20 21:39:13,766 INFO L878 garLoopResultBuilder]: At program point L36-2(lines 36 44) the Hoare annotation is: (let ((.cse6 (mod main_~A~0 4294967296)) (.cse5 (mod main_~B~0 4294967296))) (let ((.cse4 (= main_~d~0 (* main_~p~0 .cse5))) (.cse1 (= (+ main_~r~0 (* main_~q~0 .cse5)) .cse6)) (.cse2 (<= .cse6 5)) (.cse3 (= main_~q~0 0)) (.cse0 (* .cse5 4))) (or (and (= .cse0 main_~d~0) (< (div (div (div (+ main_~d~0 (- 4)) 2) 2) (- 4294967296)) 1) .cse1 .cse2 .cse3 (= main_~p~0 4) (<= (div (* (- 1) main_~d~0) (- 2)) main_~r~0)) (and .cse4 .cse1 (< (div (+ (- 1) main_~d~0) (- 4294967296)) 1) .cse2 .cse3 (= main_~p~0 1)) (and .cse4 (= main_~p~0 2) .cse1 .cse2 .cse3 (<= .cse5 main_~r~0) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and .cse4 (<= 1 .cse5) .cse1 (= (* 8 .cse5) main_~d~0) .cse2 .cse3 (<= .cse0 main_~r~0))))) [2022-03-20 21:39:13,766 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 63) the Hoare annotation is: true [2022-03-20 21:39:13,767 INFO L885 garLoopResultBuilder]: At program point L61(line 61) the Hoare annotation is: true [2022-03-20 21:39:13,767 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (<= (mod main_~A~0 4294967296) 5) [2022-03-20 21:39:13,767 INFO L878 garLoopResultBuilder]: At program point L28-1(line 28) the Hoare annotation is: (<= (mod main_~A~0 4294967296) 5) [2022-03-20 21:39:13,767 INFO L885 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2022-03-20 21:39:13,767 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (<= (mod main_~A~0 4294967296) 5) [2022-03-20 21:39:13,767 INFO L878 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (let ((.cse8 (mod main_~B~0 4294967296))) (let ((.cse19 (* (- 1) main_~d~0)) (.cse24 (+ main_~d~0 main_~r~0)) (.cse26 (* (- 1) main_~r~0)) (.cse25 (* .cse8 4)) (.cse5 (mod main_~A~0 4294967296)) (.cse9 (* 8 .cse8))) (let ((.cse12 (< .cse5 .cse9)) (.cse13 (= .cse25 main_~d~0)) (.cse16 (= main_~p~0 4)) (.cse3 (div (+ .cse5 .cse26) 2)) (.cse2 (<= .cse25 .cse5)) (.cse7 (= main_~q~0 4)) (.cse17 (< main_~r~0 main_~d~0)) (.cse1 (= main_~p~0 2)) (.cse14 (= .cse24 .cse5)) (.cse6 (* main_~r~0 2)) (.cse22 (* main_~d~0 2)) (.cse10 (div (+ .cse19 .cse5 .cse26) 2)) (.cse20 (= main_~d~0 .cse8)) (.cse0 (<= 0 main_~r~0)) (.cse23 (* 2 .cse8)) (.cse11 (= main_~p~0 1)) (.cse21 (= main_~d~0 (* main_~p~0 .cse8))) (.cse15 (= (+ main_~r~0 (* main_~q~0 .cse8)) .cse5)) (.cse4 (<= .cse5 5)) (.cse18 (= main_~q~0 0))) (or (and .cse0 .cse1 .cse2 (= main_~d~0 .cse3) .cse4 (= (mod (div (- (div (+ (* (- 2) .cse5) .cse6) (- 2))) (- 2)) 2) 0) .cse7 (< (div (+ (* (- 4) .cse8) 5) (- 4294967296)) (+ (div (+ (- 1) .cse9) 4294967296) 1)) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and (= (+ main_~p~0 4) main_~q~0) .cse0 .cse4 (= .cse5 (+ (* 5 .cse8) main_~r~0)) (= (div .cse10 2) main_~d~0) .cse11 .cse12) (and .cse13 .cse14 .cse2 .cse15 .cse4 .cse16 .cse12) (and .cse17 .cse13 .cse15 .cse4 .cse18 .cse16 (<= (div .cse19 (- 2)) main_~r~0)) (and .cse20 .cse15 .cse18 .cse11) (and (= main_~d~0 (div .cse3 2)) (not (<= .cse9 .cse5)) .cse2 .cse15 .cse4 .cse7 .cse11) (and .cse17 .cse21 .cse1 .cse15 .cse18 (<= .cse8 main_~r~0)) (and (< .cse5 .cse22) .cse0 .cse1 (= (mod (div (* (- 2) main_~d~0) (- 2)) 2) 0) .cse14 .cse15 .cse4 (<= .cse23 .cse24) (< .cse24 .cse25)) (and .cse20 (= .cse5 (+ main_~r~0 .cse8)) (= main_~q~0 1) (<= .cse8 .cse24) (< .cse5 .cse23) .cse11) (and (< (+ .cse6 .cse22) .cse5) (= main_~q~0 3) .cse0 (= main_~d~0 .cse10) (= (+ main_~r~0 (* 3 .cse8)) .cse5) .cse4 .cse11) (and .cse20 .cse0 (< main_~r~0 .cse23) .cse15 (= .cse5 (+ main_~r~0 .cse23)) .cse4 .cse11) (and .cse21 (<= 1 .cse8) .cse15 (= .cse9 main_~d~0) .cse4 .cse18 (<= .cse25 main_~r~0)))))) [2022-03-20 21:39:13,767 INFO L878 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (let ((.cse8 (mod main_~B~0 4294967296))) (let ((.cse9 (* 8 .cse8)) (.cse18 (* .cse8 4)) (.cse15 (+ main_~d~0 main_~r~0)) (.cse21 (* (- 1) main_~d~0)) (.cse5 (mod main_~A~0 4294967296)) (.cse25 (* (- 1) main_~r~0))) (let ((.cse6 (* main_~r~0 2)) (.cse10 (div (+ .cse21 .cse5 .cse25) 2)) (.cse3 (div (+ .cse5 .cse25) 2)) (.cse7 (= main_~q~0 4)) (.cse17 (< main_~r~0 main_~d~0)) (.cse1 (= main_~p~0 2)) (.cse23 (= .cse15 .cse5)) (.cse2 (<= .cse18 .cse5)) (.cse24 (exists ((main_~A~0 Int)) (= main_~d~0 (* main_~p~0 (mod main_~B~0 4294967296))))) (.cse20 (= main_~p~0 4)) (.cse12 (< .cse5 .cse9)) (.cse14 (= main_~d~0 .cse8)) (.cse0 (<= 0 main_~r~0)) (.cse16 (* 2 .cse8)) (.cse11 (= main_~p~0 1)) (.cse22 (= main_~d~0 (* main_~p~0 .cse8))) (.cse13 (= (+ main_~r~0 (* main_~q~0 .cse8)) .cse5)) (.cse4 (<= .cse5 5)) (.cse19 (= main_~q~0 0))) (or (and .cse0 .cse1 .cse2 (= main_~d~0 .cse3) .cse4 (= (mod (div (- (div (+ (* (- 2) .cse5) .cse6) (- 2))) (- 2)) 2) 0) .cse7 (< (div (+ (* (- 4) .cse8) 5) (- 4294967296)) (+ (div (+ (- 1) .cse9) 4294967296) 1)) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and (= (+ main_~p~0 4) main_~q~0) .cse0 .cse4 (= .cse5 (+ (* 5 .cse8) main_~r~0)) (= (div .cse10 2) main_~d~0) .cse11 .cse12) (and (< (+ .cse6 (* main_~d~0 2)) .cse5) .cse0 (= main_~d~0 .cse10) .cse13 (= (+ main_~r~0 (* 3 .cse8)) .cse5) .cse4 .cse11) (and .cse14 (= .cse5 (+ (* (mod main_~d~0 4294967296) main_~q~0) main_~r~0)) (= main_~q~0 1) (<= .cse8 .cse15) (< .cse5 .cse16) .cse11) (and .cse17 (= .cse18 main_~d~0) .cse13 .cse4 .cse19 .cse20 (<= (div .cse21 (- 2)) main_~r~0)) (and .cse14 .cse13 .cse19 .cse11) (and (= main_~d~0 (div .cse3 2)) (not (<= .cse9 .cse5)) .cse2 .cse13 .cse4 .cse7 .cse11) (and .cse17 .cse22 .cse1 .cse13 .cse19 (<= .cse8 main_~r~0)) (and .cse1 .cse23 .cse13 .cse4 .cse24 (<= .cse16 .cse15) (< .cse15 .cse18)) (and .cse23 .cse2 .cse13 .cse4 .cse24 .cse20 .cse12) (and .cse14 .cse0 (< main_~r~0 .cse16) .cse13 (= .cse5 (+ main_~r~0 .cse16)) .cse4 .cse11) (and .cse22 (<= 1 .cse8) .cse13 (= .cse9 main_~d~0) .cse4 .cse19 (<= .cse18 main_~r~0)))))) [2022-03-20 21:39:13,767 INFO L878 garLoopResultBuilder]: At program point L39(lines 36 44) the Hoare annotation is: (let ((.cse6 (mod main_~A~0 4294967296)) (.cse5 (mod main_~B~0 4294967296))) (let ((.cse4 (= main_~d~0 (* main_~p~0 .cse5))) (.cse1 (= (+ main_~r~0 (* main_~q~0 .cse5)) .cse6)) (.cse2 (<= .cse6 5)) (.cse3 (= main_~q~0 0)) (.cse0 (* .cse5 4))) (or (and (= .cse0 main_~d~0) (< (div (div (div (+ main_~d~0 (- 4)) 2) 2) (- 4294967296)) 1) .cse1 .cse2 .cse3 (= main_~p~0 4) (<= (div (* (- 1) main_~d~0) (- 2)) main_~r~0)) (and .cse4 .cse1 (< (div (+ (- 1) main_~d~0) (- 4294967296)) 1) .cse2 .cse3 (= main_~p~0 1)) (and .cse4 (= main_~p~0 2) .cse1 .cse2 .cse3 (<= .cse5 main_~r~0) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and .cse4 (<= 1 .cse5) .cse1 (= (* 8 .cse5) main_~d~0) .cse2 .cse3 (<= .cse0 main_~r~0))))) [2022-03-20 21:39:13,767 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse6 (mod main_~A~0 4294967296)) (.cse5 (mod main_~B~0 4294967296))) (let ((.cse4 (= main_~d~0 (* main_~p~0 .cse5))) (.cse1 (= (+ main_~r~0 (* main_~q~0 .cse5)) .cse6)) (.cse2 (<= .cse6 5)) (.cse3 (= main_~q~0 0)) (.cse0 (* .cse5 4))) (or (and (= .cse0 main_~d~0) (< (div (div (div (+ main_~d~0 (- 4)) 2) 2) (- 4294967296)) 1) .cse1 .cse2 .cse3 (= main_~p~0 4) (<= (div (* (- 1) main_~d~0) (- 2)) main_~r~0)) (and .cse4 .cse1 (< (div (+ (- 1) main_~d~0) (- 4294967296)) 1) .cse2 .cse3 (= main_~p~0 1)) (and .cse4 (= main_~p~0 2) .cse1 .cse2 .cse3 (<= .cse5 main_~r~0) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and .cse4 (<= 1 .cse5) .cse1 (= (* 8 .cse5) main_~d~0) .cse2 .cse3 (<= .cse0 main_~r~0))))) [2022-03-20 21:39:13,767 INFO L878 garLoopResultBuilder]: At program point L37-1(line 37) the Hoare annotation is: (let ((.cse6 (mod main_~A~0 4294967296)) (.cse5 (mod main_~B~0 4294967296))) (let ((.cse4 (= main_~d~0 (* main_~p~0 .cse5))) (.cse1 (= (+ main_~r~0 (* main_~q~0 .cse5)) .cse6)) (.cse2 (<= .cse6 5)) (.cse3 (= main_~q~0 0)) (.cse0 (* .cse5 4))) (or (and (= .cse0 main_~d~0) (< (div (div (div (+ main_~d~0 (- 4)) 2) 2) (- 4294967296)) 1) .cse1 .cse2 .cse3 (= main_~p~0 4) (<= (div (* (- 1) main_~d~0) (- 2)) main_~r~0)) (and .cse4 .cse1 (< (div (+ (- 1) main_~d~0) (- 4294967296)) 1) .cse2 .cse3 (= main_~p~0 1)) (and .cse4 (= main_~p~0 2) .cse1 .cse2 .cse3 (<= .cse5 main_~r~0) (< (div (div (+ (- 2) main_~d~0) 2) (- 4294967296)) 1)) (and .cse4 (<= 1 .cse5) .cse1 (= (* 8 .cse5) main_~d~0) .cse2 .cse3 (<= .cse0 main_~r~0))))) [2022-03-20 21:39:13,767 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 21:39:13,767 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|)) [2022-03-20 21:39:13,768 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 21:39:13,768 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 21:39:13,768 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 21:39:13,768 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 21:39:13,768 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 21:39:13,768 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 21:39:13,768 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 21:39:13,768 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-20 21:39:13,768 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 21:39:13,768 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 21:39:13,768 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 21:39:13,770 INFO L719 BasicCegarLoop]: Path program histogram: [14, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-20 21:39:13,771 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 21:39:13,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:39:13 BoogieIcfgContainer [2022-03-20 21:39:13,781 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 21:39:13,782 INFO L158 Benchmark]: Toolchain (without parser) took 429380.19ms. Allocated memory was 183.5MB in the beginning and 225.4MB in the end (delta: 41.9MB). Free memory was 134.9MB in the beginning and 130.0MB in the end (delta: 4.9MB). Peak memory consumption was 113.0MB. Max. memory is 8.0GB. [2022-03-20 21:39:13,782 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 183.5MB. Free memory was 151.1MB in the beginning and 151.0MB in the end (delta: 74.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 21:39:13,782 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.52ms. Allocated memory is still 183.5MB. Free memory was 134.7MB in the beginning and 159.6MB in the end (delta: -24.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 21:39:13,782 INFO L158 Benchmark]: Boogie Preprocessor took 31.90ms. Allocated memory is still 183.5MB. Free memory was 159.6MB in the beginning and 158.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 21:39:13,782 INFO L158 Benchmark]: RCFGBuilder took 219.76ms. Allocated memory is still 183.5MB. Free memory was 158.1MB in the beginning and 147.4MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 21:39:13,783 INFO L158 Benchmark]: TraceAbstraction took 428915.26ms. Allocated memory was 183.5MB in the beginning and 225.4MB in the end (delta: 41.9MB). Free memory was 146.8MB in the beginning and 130.0MB in the end (delta: 16.8MB). Peak memory consumption was 125.1MB. Max. memory is 8.0GB. [2022-03-20 21:39:13,783 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 183.5MB. Free memory was 151.1MB in the beginning and 151.0MB in the end (delta: 74.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 208.52ms. Allocated memory is still 183.5MB. Free memory was 134.7MB in the beginning and 159.6MB in the end (delta: -24.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.90ms. Allocated memory is still 183.5MB. Free memory was 159.6MB in the beginning and 158.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 219.76ms. Allocated memory is still 183.5MB. Free memory was 158.1MB in the beginning and 147.4MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 428915.26ms. Allocated memory was 183.5MB in the beginning and 225.4MB in the end (delta: 41.9MB). Free memory was 146.8MB in the beginning and 130.0MB in the end (delta: 16.8MB). Peak memory consumption was 125.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 428.8s, OverallIterations: 20, TraceHistogramMax: 21, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 15.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 23.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 521 SdHoareTripleChecker+Valid, 7.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 424 mSDsluCounter, 5879 SdHoareTripleChecker+Invalid, 6.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 40 IncrementalHoareTripleChecker+Unchecked, 4930 mSDsCounter, 527 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4341 IncrementalHoareTripleChecker+Invalid, 4908 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 527 mSolverCounterUnsat, 949 mSDtfsCounter, 4341 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3105 GetRequests, 2754 SyntacticMatches, 31 SemanticMatches, 320 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 97.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=173occurred in iteration=18, InterpolantAutomatonStates: 200, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 37 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 798 PreInvPairs, 1086 NumberOfFragments, 3857 HoareAnnotationTreeSize, 798 FomulaSimplifications, 1592 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 38 FomulaSimplificationsInter, 9869 FormulaSimplificationTreeSizeReductionInter, 23.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((((B % 4294967296 * 4 == d && (d + -4) / 2 / 2 / -4294967296 < 1) && r + q * (B % 4294967296) == A % 4294967296) && A % 4294967296 <= 5) && q == 0) && p == 4) && -1 * d / -2 <= r) || (((((d == p * (B % 4294967296) && r + q * (B % 4294967296) == A % 4294967296) && (-1 + d) / -4294967296 < 1) && A % 4294967296 <= 5) && q == 0) && p == 1)) || ((((((d == p * (B % 4294967296) && p == 2) && r + q * (B % 4294967296) == A % 4294967296) && A % 4294967296 <= 5) && q == 0) && B % 4294967296 <= r) && (-2 + d) / 2 / -4294967296 < 1)) || ((((((d == p * (B % 4294967296) && 1 <= B % 4294967296) && r + q * (B % 4294967296) == A % 4294967296) && 8 * (B % 4294967296) == d) && A % 4294967296 <= 5) && q == 0) && B % 4294967296 * 4 <= r) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-20 21:39:13,988 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...