/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/hard-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 03:16:32,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 03:16:32,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 03:16:32,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 03:16:32,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 03:16:32,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 03:16:32,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 03:16:32,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 03:16:32,837 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 03:16:32,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 03:16:32,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 03:16:32,839 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 03:16:32,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 03:16:32,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 03:16:32,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 03:16:32,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 03:16:32,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 03:16:32,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 03:16:32,840 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 03:16:32,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 03:16:32,841 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 03:16:32,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 03:16:32,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 03:16:32,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 03:16:32,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 03:16:32,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 03:16:32,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:16:32,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 03:16:32,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 03:16:32,842 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 03:16:32,842 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 03:16:32,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 03:16:32,842 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 03:16:32,842 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 03:16:33,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 03:16:33,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 03:16:33,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 03:16:33,090 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 03:16:33,091 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 03:16:33,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard-ll.c [2022-03-19 03:16:33,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c976aa16d/1d97f508e59e426ca7ca2bb4e493a422/FLAG2e765f6d0 [2022-03-19 03:16:33,515 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 03:16:33,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-ll.c [2022-03-19 03:16:33,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c976aa16d/1d97f508e59e426ca7ca2bb4e493a422/FLAG2e765f6d0 [2022-03-19 03:16:33,533 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c976aa16d/1d97f508e59e426ca7ca2bb4e493a422 [2022-03-19 03:16:33,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 03:16:33,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 03:16:33,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 03:16:33,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 03:16:33,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 03:16:33,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:16:33" (1/1) ... [2022-03-19 03:16:33,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f81235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:16:33, skipping insertion in model container [2022-03-19 03:16:33,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:16:33" (1/1) ... [2022-03-19 03:16:33,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 03:16:33,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 03:16:33,724 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/hard-ll.c[538,551] [2022-03-19 03:16:33,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:16:33,745 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 03:16:33,755 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/hard-ll.c[538,551] [2022-03-19 03:16:33,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:16:33,771 INFO L208 MainTranslator]: Completed translation [2022-03-19 03:16:33,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:16:33 WrapperNode [2022-03-19 03:16:33,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 03:16:33,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 03:16:33,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 03:16:33,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 03:16:33,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:16:33" (1/1) ... [2022-03-19 03:16:33,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:16:33" (1/1) ... [2022-03-19 03:16:33,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:16:33" (1/1) ... [2022-03-19 03:16:33,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:16:33" (1/1) ... [2022-03-19 03:16:33,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:16:33" (1/1) ... [2022-03-19 03:16:33,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:16:33" (1/1) ... [2022-03-19 03:16:33,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:16:33" (1/1) ... [2022-03-19 03:16:33,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 03:16:33,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 03:16:33,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 03:16:33,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 03:16:33,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:16:33" (1/1) ... [2022-03-19 03:16:33,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:16:33,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:33,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 03:16:33,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 03:16:33,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 03:16:33,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 03:16:33,871 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 03:16:33,871 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 03:16:33,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 03:16:33,871 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 03:16:33,872 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 03:16:33,872 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 03:16:33,873 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 03:16:33,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 03:16:33,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 03:16:33,874 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 03:16:33,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 03:16:33,874 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 03:16:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 03:16:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 03:16:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 03:16:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 03:16:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 03:16:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 03:16:33,939 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 03:16:33,941 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 03:16:34,047 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 03:16:34,052 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 03:16:34,053 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 03:16:34,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:16:34 BoogieIcfgContainer [2022-03-19 03:16:34,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 03:16:34,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 03:16:34,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 03:16:34,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 03:16:34,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 03:16:33" (1/3) ... [2022-03-19 03:16:34,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694dd340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:16:34, skipping insertion in model container [2022-03-19 03:16:34,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:16:33" (2/3) ... [2022-03-19 03:16:34,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694dd340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:16:34, skipping insertion in model container [2022-03-19 03:16:34,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:16:34" (3/3) ... [2022-03-19 03:16:34,071 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll.c [2022-03-19 03:16:34,075 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 03:16:34,076 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 03:16:34,148 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 03:16:34,154 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 03:16:34,154 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 03:16:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 03:16:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 03:16:34,189 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:34,190 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:34,190 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:34,202 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2022-03-19 03:16:34,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:34,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1919147490] [2022-03-19 03:16:34,224 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:16:34,224 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 2 times [2022-03-19 03:16:34,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:34,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299170724] [2022-03-19 03:16:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:34,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:16:34,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:16:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:16:34,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:16:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:16:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:16:34,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:34,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299170724] [2022-03-19 03:16:34,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299170724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:34,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:34,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 03:16:34,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:34,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1919147490] [2022-03-19 03:16:34,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1919147490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:34,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:34,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 03:16:34,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375041801] [2022-03-19 03:16:34,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:34,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 03:16:34,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 03:16:34,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 03:16:34,470 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 03:16:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:34,577 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2022-03-19 03:16:34,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 03:16:34,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 03:16:34,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:34,588 INFO L225 Difference]: With dead ends: 61 [2022-03-19 03:16:34,588 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 03:16:34,591 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 03:16:34,593 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:34,602 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:16:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 03:16:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-19 03:16:34,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 03:16:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-03-19 03:16:34,637 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-03-19 03:16:34,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:34,637 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-03-19 03:16:34,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 03:16:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-03-19 03:16:34,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 03:16:34,638 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:34,639 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:34,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 03:16:34,639 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2022-03-19 03:16:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:34,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [614007535] [2022-03-19 03:16:34,641 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:16:34,641 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 2 times [2022-03-19 03:16:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:34,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824185788] [2022-03-19 03:16:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:34,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:16:34,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:16:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:16:34,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:16:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:16:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:16:34,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:34,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824185788] [2022-03-19 03:16:34,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824185788] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:34,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:34,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:16:34,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:34,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [614007535] [2022-03-19 03:16:34,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [614007535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:34,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:34,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:16:34,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070373397] [2022-03-19 03:16:34,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:34,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 03:16:34,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:34,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 03:16:34,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 03:16:34,770 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 03:16:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:34,960 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-03-19 03:16:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 03:16:34,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 03:16:34,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:34,964 INFO L225 Difference]: With dead ends: 43 [2022-03-19 03:16:34,964 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 03:16:34,965 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 03:16:34,966 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:34,967 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:16:34,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 03:16:34,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-19 03:16:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 03:16:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-19 03:16:34,990 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-03-19 03:16:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:34,990 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-19 03:16:34,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 03:16:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-19 03:16:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 03:16:34,991 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:34,991 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:34,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 03:16:34,991 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:34,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:34,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2022-03-19 03:16:34,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:34,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1786809130] [2022-03-19 03:16:34,993 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:16:34,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 2 times [2022-03-19 03:16:34,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:34,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628589952] [2022-03-19 03:16:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:34,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:16:35,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:16:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:16:35,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:16:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:16:35,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 03:16:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:16:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:16:35,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:35,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628589952] [2022-03-19 03:16:35,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628589952] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:35,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:35,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:16:35,116 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:35,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1786809130] [2022-03-19 03:16:35,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1786809130] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:35,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:35,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:16:35,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280303900] [2022-03-19 03:16:35,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:35,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 03:16:35,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:35,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 03:16:35,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 03:16:35,120 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 03:16:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:35,297 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-03-19 03:16:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 03:16:35,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-19 03:16:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:35,301 INFO L225 Difference]: With dead ends: 47 [2022-03-19 03:16:35,301 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 03:16:35,302 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 03:16:35,305 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:35,311 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:16:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 03:16:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-03-19 03:16:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 03:16:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-03-19 03:16:35,321 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-03-19 03:16:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:35,322 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-03-19 03:16:35,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 03:16:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-03-19 03:16:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 03:16:35,323 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:35,323 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:35,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 03:16:35,323 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:35,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:35,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2022-03-19 03:16:35,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:35,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1241877869] [2022-03-19 03:16:35,324 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:16:35,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 2 times [2022-03-19 03:16:35,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:35,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344815725] [2022-03-19 03:16:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:35,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:35,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:35,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751500754] [2022-03-19 03:16:35,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:16:35,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:35,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:35,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:16:35,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 03:16:35,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:16:35,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:35,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 03:16:35,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 03:16:35,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:16:35,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:35,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344815725] [2022-03-19 03:16:35,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:35,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751500754] [2022-03-19 03:16:35,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751500754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:35,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:35,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:16:35,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:35,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1241877869] [2022-03-19 03:16:35,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1241877869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:35,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:35,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:16:35,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601511843] [2022-03-19 03:16:35,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:35,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:16:35,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:35,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:16:35,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 03:16:35,553 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 03:16:35,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:35,622 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-19 03:16:35,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 03:16:35,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-19 03:16:35,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:35,624 INFO L225 Difference]: With dead ends: 66 [2022-03-19 03:16:35,624 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 03:16:35,624 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 03:16:35,625 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:35,626 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 138 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:16:35,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 03:16:35,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-19 03:16:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 03:16:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-03-19 03:16:35,638 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-03-19 03:16:35,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:35,638 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-03-19 03:16:35,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 03:16:35,638 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-03-19 03:16:35,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 03:16:35,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:35,639 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:35,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 03:16:35,855 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 [2022-03-19 03:16:35,856 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:35,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2022-03-19 03:16:35,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:35,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [244748030] [2022-03-19 03:16:35,857 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:16:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 2 times [2022-03-19 03:16:35,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:35,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978139606] [2022-03-19 03:16:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:35,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:35,868 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:35,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138456393] [2022-03-19 03:16:35,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:16:35,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:35,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:35,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:16:35,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 03:16:35,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:16:35,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:35,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 03:16:35,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 03:16:36,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:16:36,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:36,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978139606] [2022-03-19 03:16:36,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:36,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138456393] [2022-03-19 03:16:36,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138456393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:36,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:36,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:16:36,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:36,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [244748030] [2022-03-19 03:16:36,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [244748030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:36,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:36,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:16:36,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622960305] [2022-03-19 03:16:36,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:36,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:16:36,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:36,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:16:36,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 03:16:36,110 INFO L87 Difference]: Start difference. First operand 52 states and 63 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 03:16:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:36,171 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2022-03-19 03:16:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 03:16:36,172 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-19 03:16:36,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:36,173 INFO L225 Difference]: With dead ends: 65 [2022-03-19 03:16:36,173 INFO L226 Difference]: Without dead ends: 58 [2022-03-19 03:16:36,174 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 03:16:36,174 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 112 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 [2022-03-19 03:16:36,175 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:16:36,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-19 03:16:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-03-19 03:16:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 03:16:36,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-03-19 03:16:36,187 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2022-03-19 03:16:36,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:36,188 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-03-19 03:16:36,188 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 03:16:36,188 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-03-19 03:16:36,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 03:16:36,189 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:36,189 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:36,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 03:16:36,403 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 [2022-03-19 03:16:36,404 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:36,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2022-03-19 03:16:36,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:36,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1386672912] [2022-03-19 03:16:36,423 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:16:36,423 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 03:16:36,423 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:16:36,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 2 times [2022-03-19 03:16:36,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:36,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156579520] [2022-03-19 03:16:36,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:36,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:36,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:36,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879306224] [2022-03-19 03:16:36,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:16:36,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:36,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:36,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:16:36,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 03:16:36,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:16:36,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:36,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 03:16:36,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 03:16:36,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:16:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 03:16:36,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:36,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156579520] [2022-03-19 03:16:36,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:36,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879306224] [2022-03-19 03:16:36,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879306224] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 03:16:36,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:16:36,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-19 03:16:36,904 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:36,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1386672912] [2022-03-19 03:16:36,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1386672912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:36,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:36,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:16:36,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358858068] [2022-03-19 03:16:36,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:36,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:16:36,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:36,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:16:36,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 03:16:36,905 INFO L87 Difference]: Start difference. First operand 57 states and 69 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 03:16:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:36,960 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-03-19 03:16:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 03:16:36,961 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-03-19 03:16:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:36,963 INFO L225 Difference]: With dead ends: 69 [2022-03-19 03:16:36,963 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 03:16:36,964 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-19 03:16:36,964 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:36,965 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:16:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 03:16:36,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-03-19 03:16:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 03:16:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-03-19 03:16:36,978 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 44 [2022-03-19 03:16:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:36,978 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-03-19 03:16:36,978 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 03:16:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-03-19 03:16:36,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 03:16:36,980 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:36,980 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-03-19 03:16:37,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 03:16:37,195 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 [2022-03-19 03:16:37,196 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2022-03-19 03:16:37,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:37,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1402333394] [2022-03-19 03:16:37,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:16:37,202 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 03:16:37,202 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:16:37,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 2 times [2022-03-19 03:16:37,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:37,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347684487] [2022-03-19 03:16:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:37,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:37,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:37,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644186208] [2022-03-19 03:16:37,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:16:37,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:37,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:37,214 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:16:37,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 03:16:37,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:16:37,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:37,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 03:16:37,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 03:16:37,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:16:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 03:16:39,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:39,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347684487] [2022-03-19 03:16:39,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:39,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644186208] [2022-03-19 03:16:39,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644186208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:16:39,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:16:39,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 03:16:39,145 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:39,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1402333394] [2022-03-19 03:16:39,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1402333394] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:39,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:39,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 03:16:39,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84110179] [2022-03-19 03:16:39,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:39,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 03:16:39,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:39,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 03:16:39,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 03:16:39,146 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 03:16:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:39,302 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2022-03-19 03:16:39,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 03:16:39,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2022-03-19 03:16:39,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:39,305 INFO L225 Difference]: With dead ends: 124 [2022-03-19 03:16:39,305 INFO L226 Difference]: Without dead ends: 101 [2022-03-19 03:16:39,306 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-19 03:16:39,306 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:39,307 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 216 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:16:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-19 03:16:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-03-19 03:16:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 03:16:39,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2022-03-19 03:16:39,335 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 64 [2022-03-19 03:16:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:39,336 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2022-03-19 03:16:39,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 03:16:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2022-03-19 03:16:39,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 03:16:39,338 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:39,338 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:39,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 03:16:39,561 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 [2022-03-19 03:16:39,562 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:39,562 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 3 times [2022-03-19 03:16:39,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:39,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [834868712] [2022-03-19 03:16:39,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:16:39,566 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 03:16:39,566 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:16:39,566 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 4 times [2022-03-19 03:16:39,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:39,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412512649] [2022-03-19 03:16:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:39,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:39,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:39,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031133974] [2022-03-19 03:16:39,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:16:39,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:39,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:39,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:16:39,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 03:16:39,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:16:39,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:39,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 03:16:39,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 23 proven. 27 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-19 03:16:40,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:16:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-19 03:16:42,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:42,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412512649] [2022-03-19 03:16:42,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:42,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031133974] [2022-03-19 03:16:42,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031133974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:16:42,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:16:42,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-03-19 03:16:42,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:42,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [834868712] [2022-03-19 03:16:42,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [834868712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:42,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:42,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 03:16:42,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044336484] [2022-03-19 03:16:42,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:42,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 03:16:42,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:42,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 03:16:42,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-19 03:16:42,324 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-19 03:16:42,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:42,711 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-03-19 03:16:42,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 03:16:42,713 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 69 [2022-03-19 03:16:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:42,715 INFO L225 Difference]: With dead ends: 126 [2022-03-19 03:16:42,715 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 03:16:42,715 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-03-19 03:16:42,716 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:42,716 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 226 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 03:16:42,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 03:16:42,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-19 03:16:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 66 states have internal predecessors, (69), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 03:16:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-03-19 03:16:42,738 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 69 [2022-03-19 03:16:42,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:42,738 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-03-19 03:16:42,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-19 03:16:42,738 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-03-19 03:16:42,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 03:16:42,739 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:42,740 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2022-03-19 03:16:42,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 03:16:42,963 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 [2022-03-19 03:16:42,963 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:42,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2022-03-19 03:16:42,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:42,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [158523400] [2022-03-19 03:16:42,968 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:16:42,968 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 03:16:42,968 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:16:42,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 2 times [2022-03-19 03:16:42,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:42,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275619752] [2022-03-19 03:16:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:42,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:42,976 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:42,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439850455] [2022-03-19 03:16:42,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:16:42,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:42,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:42,978 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:16:42,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 03:16:43,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:16:43,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:43,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 03:16:43,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-19 03:16:43,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:16:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-19 03:16:43,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:43,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275619752] [2022-03-19 03:16:43,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:43,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439850455] [2022-03-19 03:16:43,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439850455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:16:43,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:16:43,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-03-19 03:16:43,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:43,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [158523400] [2022-03-19 03:16:43,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [158523400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:43,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:43,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 03:16:43,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104444252] [2022-03-19 03:16:43,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:43,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 03:16:43,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:43,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 03:16:43,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-19 03:16:43,531 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 03:16:43,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:43,698 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2022-03-19 03:16:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 03:16:43,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 75 [2022-03-19 03:16:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:43,700 INFO L225 Difference]: With dead ends: 116 [2022-03-19 03:16:43,700 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 03:16:43,700 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-19 03:16:43,701 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:43,701 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 191 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:16:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 03:16:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2022-03-19 03:16:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 57 states have internal predecessors, (60), 24 states have call successors, (24), 13 states have call predecessors, (24), 12 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-19 03:16:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2022-03-19 03:16:43,714 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 75 [2022-03-19 03:16:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:43,714 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2022-03-19 03:16:43,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 03:16:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2022-03-19 03:16:43,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 03:16:43,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:43,715 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2022-03-19 03:16:43,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 03:16:43,939 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 [2022-03-19 03:16:43,939 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:43,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:43,939 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 5 times [2022-03-19 03:16:43,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:43,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [878449543] [2022-03-19 03:16:43,942 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:16:43,942 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 03:16:43,942 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:16:43,943 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 6 times [2022-03-19 03:16:43,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:43,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601668450] [2022-03-19 03:16:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:43,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:43,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:43,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30643049] [2022-03-19 03:16:43,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:16:43,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:43,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:43,953 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:16:43,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 03:16:44,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 03:16:44,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:44,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 03:16:44,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 03:16:56,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:17:49,468 WARN L232 SmtUtils]: Spent 29.98s 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) [2022-03-19 03:18:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 03:18:49,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:18:49,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601668450] [2022-03-19 03:18:49,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:18:49,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30643049] [2022-03-19 03:18:49,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30643049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:18:49,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:18:49,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2022-03-19 03:18:49,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:18:49,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [878449543] [2022-03-19 03:18:49,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [878449543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:18:49,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:18:49,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 03:18:49,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901569923] [2022-03-19 03:18:49,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:18:49,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 03:18:49,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:18:49,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 03:18:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=163, Unknown=1, NotChecked=0, Total=210 [2022-03-19 03:18:49,829 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 03:18:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:18:50,540 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2022-03-19 03:18:50,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:18:50,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 81 [2022-03-19 03:18:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:18:50,542 INFO L225 Difference]: With dead ends: 116 [2022-03-19 03:18:50,542 INFO L226 Difference]: Without dead ends: 104 [2022-03-19 03:18:50,542 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2022-03-19 03:18:50,543 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:18:50,543 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 166 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 03:18:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-19 03:18:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-03-19 03:18:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 67 states have internal predecessors, (69), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 21 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 03:18:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2022-03-19 03:18:50,557 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 81 [2022-03-19 03:18:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:18:50,558 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2022-03-19 03:18:50,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 03:18:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2022-03-19 03:18:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 03:18:50,559 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:18:50,559 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2022-03-19 03:18:50,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 03:18:50,761 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 [2022-03-19 03:18:50,761 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:18:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:18:50,762 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 7 times [2022-03-19 03:18:50,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:18:50,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067441545] [2022-03-19 03:18:50,765 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:18:50,765 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 03:18:50,765 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:18:50,765 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 8 times [2022-03-19 03:18:50,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:18:50,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105475882] [2022-03-19 03:18:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:18:50,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:18:50,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:18:50,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403207466] [2022-03-19 03:18:50,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:18:50,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:18:50,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:18:50,785 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:18:50,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 03:18:50,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:18:50,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:18:50,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 03:18:50,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:18:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 03:18:51,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:18:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-03-19 03:18:53,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:18:53,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105475882] [2022-03-19 03:18:53,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:18:53,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403207466] [2022-03-19 03:18:53,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403207466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:18:53,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:18:53,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-03-19 03:18:53,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:18:53,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067441545] [2022-03-19 03:18:53,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067441545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:18:53,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:18:53,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 03:18:53,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954292119] [2022-03-19 03:18:53,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:18:53,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 03:18:53,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:18:53,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 03:18:53,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-19 03:18:53,519 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-19 03:18:53,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:18:53,777 INFO L93 Difference]: Finished difference Result 191 states and 248 transitions. [2022-03-19 03:18:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:18:53,778 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2022-03-19 03:18:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:18:53,779 INFO L225 Difference]: With dead ends: 191 [2022-03-19 03:18:53,780 INFO L226 Difference]: Without dead ends: 144 [2022-03-19 03:18:53,780 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-19 03:18:53,781 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 32 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:18:53,781 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 381 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:18:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-19 03:18:53,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-03-19 03:18:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 94 states have internal predecessors, (96), 42 states have call successors, (42), 17 states have call predecessors, (42), 16 states have return successors, (38), 32 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-19 03:18:53,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 176 transitions. [2022-03-19 03:18:53,809 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 176 transitions. Word has length 86 [2022-03-19 03:18:53,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:18:53,811 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 176 transitions. [2022-03-19 03:18:53,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-19 03:18:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 176 transitions. [2022-03-19 03:18:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-19 03:18:53,812 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:18:53,812 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 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] [2022-03-19 03:18:53,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 03:18:54,023 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 [2022-03-19 03:18:54,024 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:18:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:18:54,024 INFO L85 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 9 times [2022-03-19 03:18:54,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:18:54,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1918462313] [2022-03-19 03:18:54,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:18:54,026 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 03:18:54,026 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:18:54,027 INFO L85 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 10 times [2022-03-19 03:18:54,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:18:54,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62804456] [2022-03-19 03:18:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:18:54,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:18:54,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:18:54,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807311706] [2022-03-19 03:18:54,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:18:54,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:18:54,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:18:54,036 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:18:54,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 03:18:54,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:18:54,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:18:54,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 03:18:54,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:18:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 61 proven. 25 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-19 03:18:55,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:19:24,079 WARN L232 SmtUtils]: Spent 13.66s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:20:30,480 WARN L232 SmtUtils]: Spent 15.62s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:21:04,486 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse8 (mod c_main_~B~0 4294967296)) (.cse19 (div c_main_~p~0 2)) (.cse21 (< c_main_~d~0 0)) (.cse4 (= (mod c_main_~d~0 2) 0)) (.cse2 (div c_main_~d~0 2))) (let ((.cse3 (+ .cse2 1)) (.cse0 (and .cse21 (not .cse4))) (.cse13 (mod c_main_~A~0 4294967296)) (.cse9 (* .cse8 .cse19)) (.cse5 (= (mod c_main_~p~0 2) 0)) (.cse6 (< c_main_~p~0 0))) (and (let ((.cse20 (+ .cse19 1))) (let ((.cse1 (* .cse20 .cse8))) (or (and (or .cse0 (not (= .cse1 .cse2))) (or (not (= .cse3 .cse1)) .cse4)) .cse5 (not .cse6) (let ((.cse18 (div .cse20 2)) (.cse14 (= (mod .cse20 2) 0))) (let ((.cse15 (not .cse14)) (.cse16 (* (+ c_main_~q~0 .cse18 .cse19 1) .cse8)) (.cse10 (* (- 1) (div .cse1 2))) (.cse11 (* .cse8 (+ c_main_~q~0 .cse18 2 .cse19))) (.cse12 (* (- 1) .cse1)) (.cse7 (div (+ .cse8 .cse9) 2)) (.cse17 (= (mod .cse1 2) 0))) (and (or (not (<= (+ .cse7 .cse8 .cse9 1) c_main_~r~0)) (and (or (= (+ (- 1) .cse10 .cse11 c_main_~r~0 .cse12) .cse13) .cse14) (or .cse15 (= (+ (- 1) .cse10 c_main_~r~0 .cse16 .cse12) .cse13))) .cse17) (or (and (or .cse15 (= .cse13 (+ .cse10 c_main_~r~0 .cse16 .cse12))) (or (= .cse13 (+ .cse10 .cse11 c_main_~r~0 .cse12)) .cse14)) (not (<= (+ .cse7 .cse8 .cse9) c_main_~r~0)) (not .cse17)))))))) (or (and (or (not (= .cse3 .cse9)) .cse4 (not .cse21)) (or .cse0 (not (= .cse2 .cse9)))) (let ((.cse30 (= (mod .cse19 2) 0)) (.cse22 (div .cse9 2)) (.cse32 (div .cse19 2))) (let ((.cse31 (* .cse8 (+ c_main_~q~0 .cse19 .cse32 1))) (.cse27 (* (- 1) .cse22)) (.cse28 (* (- 1) .cse9)) (.cse29 (* .cse8 (+ c_main_~q~0 .cse19 .cse32))) (.cse25 (not .cse30)) (.cse23 (= (mod .cse9 2) 0)) (.cse24 (< .cse9 0))) (and (or (not (<= (+ .cse9 .cse22) c_main_~r~0)) (and (not .cse23) .cse24) (let ((.cse26 (< .cse19 0))) (and (or (and .cse25 .cse26) (= (+ .cse27 .cse28 .cse29 c_main_~r~0) .cse13)) (or (not .cse26) .cse30 (= .cse13 (+ .cse31 .cse27 .cse28 c_main_~r~0)))))) (or (and (or .cse30 (= .cse13 (+ (- 1) .cse31 .cse27 .cse28 c_main_~r~0))) (or (= (+ (- 1) .cse27 .cse28 .cse29 c_main_~r~0) .cse13) .cse25)) .cse23 (not (<= (+ .cse9 1 .cse22) c_main_~r~0)) (not .cse24))))) (and (not .cse5) .cse6))))) is different from false [2022-03-19 03:22:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 61 proven. 19 refuted. 0 times theorem prover too weak. 276 trivial. 6 not checked. [2022-03-19 03:22:49,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:22:49,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62804456] [2022-03-19 03:22:49,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:22:49,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807311706] [2022-03-19 03:22:49,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807311706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:22:49,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:22:49,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-19 03:22:49,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:22:49,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1918462313] [2022-03-19 03:22:49,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1918462313] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:22:49,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:22:49,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 03:22:49,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560414617] [2022-03-19 03:22:49,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:22:49,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 03:22:49,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:22:49,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 03:22:49,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=448, Unknown=1, NotChecked=44, Total=600 [2022-03-19 03:22:49,683 INFO L87 Difference]: Start difference. First operand 144 states and 176 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-19 03:22:54,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:22:54,675 INFO L93 Difference]: Finished difference Result 181 states and 207 transitions. [2022-03-19 03:22:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 03:22:54,676 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 94 [2022-03-19 03:22:54,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:22:54,677 INFO L225 Difference]: With dead ends: 181 [2022-03-19 03:22:54,677 INFO L226 Difference]: Without dead ends: 151 [2022-03-19 03:22:54,678 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=120, Invalid=533, Unknown=1, NotChecked=48, Total=702 [2022-03-19 03:22:54,678 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 18 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 03:22:54,678 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 357 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 03:22:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-19 03:22:54,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-19 03:22:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 92 states have (on average 1.0978260869565217) internal successors, (101), 99 states have internal predecessors, (101), 38 states have call successors, (38), 21 states have call predecessors, (38), 20 states have return successors, (35), 30 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-19 03:22:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 174 transitions. [2022-03-19 03:22:54,698 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 174 transitions. Word has length 94 [2022-03-19 03:22:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:22:54,698 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 174 transitions. [2022-03-19 03:22:54,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-19 03:22:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 174 transitions. [2022-03-19 03:22:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 03:22:54,699 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:22:54,700 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:22:54,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-19 03:22:54,927 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 [2022-03-19 03:22:54,928 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:22:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:22:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash -321511332, now seen corresponding path program 11 times [2022-03-19 03:22:54,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:22:54,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [457127541] [2022-03-19 03:22:54,931 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:22:54,932 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 03:22:54,932 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:22:54,932 INFO L85 PathProgramCache]: Analyzing trace with hash -321511332, now seen corresponding path program 12 times [2022-03-19 03:22:54,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:22:54,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572283412] [2022-03-19 03:22:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:22:54,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:22:54,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:22:54,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458864339] [2022-03-19 03:22:54,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:22:54,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:22:54,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:22:54,943 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:22:54,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 03:22:55,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 03:22:55,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:22:55,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 03:22:55,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:22:55,809 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:22:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 70 proven. 22 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-03-19 03:22:55,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:22:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 69 proven. 23 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-03-19 03:22:57,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:22:57,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572283412] [2022-03-19 03:22:57,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:22:57,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458864339] [2022-03-19 03:22:57,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458864339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:22:57,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:22:57,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2022-03-19 03:22:57,415 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:22:57,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [457127541] [2022-03-19 03:22:57,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [457127541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:22:57,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:22:57,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 03:22:57,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552378218] [2022-03-19 03:22:57,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:22:57,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 03:22:57,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:22:57,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 03:22:57,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-19 03:22:57,416 INFO L87 Difference]: Start difference. First operand 151 states and 174 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 03:22:58,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:23:00,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:23:01,720 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:23:04,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:23:04,311 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2022-03-19 03:23:04,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:23:04,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2022-03-19 03:23:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:23:04,313 INFO L225 Difference]: With dead ends: 163 [2022-03-19 03:23:04,313 INFO L226 Difference]: Without dead ends: 161 [2022-03-19 03:23:04,313 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-19 03:23:04,314 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-03-19 03:23:04,314 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 169 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 181 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2022-03-19 03:23:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-19 03:23:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-03-19 03:23:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 98 states have (on average 1.0918367346938775) internal successors, (107), 105 states have internal predecessors, (107), 39 states have call successors, (39), 23 states have call predecessors, (39), 22 states have return successors, (36), 31 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-19 03:23:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2022-03-19 03:23:04,332 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 103 [2022-03-19 03:23:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:23:04,332 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2022-03-19 03:23:04,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 03:23:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2022-03-19 03:23:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 03:23:04,333 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:23:04,334 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 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] [2022-03-19 03:23:04,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 03:23:04,543 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 [2022-03-19 03:23:04,544 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:23:04,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:23:04,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 3 times [2022-03-19 03:23:04,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:23:04,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [317354046] [2022-03-19 03:23:04,547 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:23:04,547 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 03:23:04,547 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:23:04,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 4 times [2022-03-19 03:23:04,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:23:04,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042930857] [2022-03-19 03:23:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:23:04,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:23:04,554 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:23:04,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048490634] [2022-03-19 03:23:04,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:23:04,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:23:04,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:23:04,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:23:04,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 03:23:04,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:23:04,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:23:04,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 03:23:04,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:23:06,016 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:23:06,019 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:23:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 106 proven. 30 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-03-19 03:23:06,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:23:06,632 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:23:06,634 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:23:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-19 03:23:06,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:23:06,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042930857] [2022-03-19 03:23:06,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:23:06,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048490634] [2022-03-19 03:23:06,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048490634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:23:06,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:23:06,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-03-19 03:23:06,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:23:06,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [317354046] [2022-03-19 03:23:06,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [317354046] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:23:06,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:23:06,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 03:23:06,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861148153] [2022-03-19 03:23:06,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:23:06,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 03:23:06,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:23:06,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 03:23:06,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-19 03:23:06,815 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-19 03:23:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:23:07,862 INFO L93 Difference]: Finished difference Result 166 states and 187 transitions. [2022-03-19 03:23:07,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 03:23:07,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 105 [2022-03-19 03:23:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:23:07,869 INFO L225 Difference]: With dead ends: 166 [2022-03-19 03:23:07,869 INFO L226 Difference]: Without dead ends: 129 [2022-03-19 03:23:07,870 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-19 03:23:07,870 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 16 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:23:07,871 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 359 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 03:23:07,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-19 03:23:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-19 03:23:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 84 states have internal predecessors, (86), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 03:23:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2022-03-19 03:23:07,890 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 105 [2022-03-19 03:23:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:23:07,890 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2022-03-19 03:23:07,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-19 03:23:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2022-03-19 03:23:07,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 03:23:07,894 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:23:07,894 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:23:07,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 03:23:08,118 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 [2022-03-19 03:23:08,119 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:23:08,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:23:08,119 INFO L85 PathProgramCache]: Analyzing trace with hash -76721736, now seen corresponding path program 13 times [2022-03-19 03:23:08,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:23:08,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [11219930] [2022-03-19 03:23:08,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:23:08,122 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 03:23:08,122 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:23:08,122 INFO L85 PathProgramCache]: Analyzing trace with hash -76721736, now seen corresponding path program 14 times [2022-03-19 03:23:08,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:23:08,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976412576] [2022-03-19 03:23:08,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:23:08,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:23:08,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:23:08,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002769874] [2022-03-19 03:23:08,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:23:08,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:23:08,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:23:08,130 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:23:08,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 03:23:08,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:23:08,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:23:08,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 03:23:08,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:23:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 03:23:09,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:23:48,224 WARN L232 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:24:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 03:24:21,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:24:21,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976412576] [2022-03-19 03:24:21,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:24:21,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002769874] [2022-03-19 03:24:21,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002769874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:24:21,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:24:21,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2022-03-19 03:24:21,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:24:21,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [11219930] [2022-03-19 03:24:21,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [11219930] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:24:21,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:24:21,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 03:24:21,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430924837] [2022-03-19 03:24:21,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:24:21,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 03:24:21,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:21,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 03:24:21,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=475, Unknown=1, NotChecked=0, Total=600 [2022-03-19 03:24:21,985 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 03:24:23,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:24:23,265 INFO L93 Difference]: Finished difference Result 230 states and 275 transitions. [2022-03-19 03:24:23,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 03:24:23,266 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 111 [2022-03-19 03:24:23,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:24:23,267 INFO L225 Difference]: With dead ends: 230 [2022-03-19 03:24:23,267 INFO L226 Difference]: Without dead ends: 185 [2022-03-19 03:24:23,268 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=132, Invalid=569, Unknown=1, NotChecked=0, Total=702 [2022-03-19 03:24:23,269 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 03:24:23,269 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 533 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 03:24:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-19 03:24:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-03-19 03:24:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 113 states have (on average 1.1061946902654867) internal successors, (125), 120 states have internal predecessors, (125), 44 states have call successors, (44), 26 states have call predecessors, (44), 25 states have return successors, (42), 36 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-19 03:24:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 211 transitions. [2022-03-19 03:24:23,300 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 211 transitions. Word has length 111 [2022-03-19 03:24:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:24:23,300 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 211 transitions. [2022-03-19 03:24:23,300 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 03:24:23,301 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 211 transitions. [2022-03-19 03:24:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 03:24:23,302 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:24:23,302 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:24:23,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-19 03:24:23,511 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 [2022-03-19 03:24:23,511 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:24:23,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:24:23,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1457203541, now seen corresponding path program 15 times [2022-03-19 03:24:23,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:23,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2032175607] [2022-03-19 03:24:23,514 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:24:23,514 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 03:24:23,514 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:24:23,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1457203541, now seen corresponding path program 16 times [2022-03-19 03:24:23,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:24:23,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266181431] [2022-03-19 03:24:23,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:24:23,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:24:23,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:24:23,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831888876] [2022-03-19 03:24:23,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:24:23,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:24:23,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:24:23,523 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:24:23,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 03:24:23,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:24:23,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:24:23,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 03:24:23,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:24:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-19 03:24:23,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:24:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 34 proven. 36 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2022-03-19 03:24:42,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:24:42,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266181431] [2022-03-19 03:24:42,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:24:42,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831888876] [2022-03-19 03:24:42,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831888876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:24:42,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:24:42,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2022-03-19 03:24:42,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:24:42,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2032175607] [2022-03-19 03:24:42,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2032175607] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:24:42,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:24:42,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:24:42,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781901464] [2022-03-19 03:24:42,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:24:42,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 03:24:42,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:42,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 03:24:42,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-03-19 03:24:42,830 INFO L87 Difference]: Start difference. First operand 183 states and 211 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 03:24:43,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:24:43,279 INFO L93 Difference]: Finished difference Result 230 states and 272 transitions. [2022-03-19 03:24:43,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 03:24:43,279 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 116 [2022-03-19 03:24:43,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:24:43,280 INFO L225 Difference]: With dead ends: 230 [2022-03-19 03:24:43,281 INFO L226 Difference]: Without dead ends: 201 [2022-03-19 03:24:43,283 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-03-19 03:24:43,283 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 15 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:24:43,283 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 603 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 03:24:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-19 03:24:43,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2022-03-19 03:24:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 132 states have internal predecessors, (135), 48 states have call successors, (48), 28 states have call predecessors, (48), 27 states have return successors, (45), 38 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-19 03:24:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 228 transitions. [2022-03-19 03:24:43,306 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 228 transitions. Word has length 116 [2022-03-19 03:24:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:24:43,306 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 228 transitions. [2022-03-19 03:24:43,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 03:24:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 228 transitions. [2022-03-19 03:24:43,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-19 03:24:43,308 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:24:43,308 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:24:43,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 03:24:43,518 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 [2022-03-19 03:24:43,518 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:24:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:24:43,519 INFO L85 PathProgramCache]: Analyzing trace with hash -238794489, now seen corresponding path program 17 times [2022-03-19 03:24:43,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:43,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [479608841] [2022-03-19 03:24:43,521 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:24:43,521 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 03:24:43,522 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:24:43,522 INFO L85 PathProgramCache]: Analyzing trace with hash -238794489, now seen corresponding path program 18 times [2022-03-19 03:24:43,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:24:43,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918446430] [2022-03-19 03:24:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:24:43,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:24:43,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:24:43,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256501047] [2022-03-19 03:24:43,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:24:43,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:24:43,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:24:43,532 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:24:43,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 03:24:43,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 03:24:43,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:24:43,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 03:24:43,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:24:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 130 proven. 53 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-03-19 03:24:45,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:25:01,118 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~B~0 4294967296))) (or (= c_main_~p~0 1) (not (= c_main_~d~0 (* c_main_~p~0 .cse0))) (let ((.cse6 (= (mod c_main_~d~0 2) 0))) (let ((.cse7 (not .cse6)) (.cse3 (mod c_main_~A~0 4294967296)) (.cse4 (* (- 1) (div c_main_~d~0 2))) (.cse8 (div c_main_~p~0 2)) (.cse1 (= (mod c_main_~p~0 2) 0)) (.cse2 (< c_main_~p~0 0))) (and (or .cse1 (not .cse2) (let ((.cse5 (* (+ c_main_~q~0 .cse8 1) .cse0))) (and (or (= .cse3 (+ (- 1) c_main_~r~0 .cse4 .cse5)) .cse6) (or (= .cse3 (+ c_main_~r~0 .cse4 .cse5)) .cse7)))) (or (let ((.cse10 (< c_main_~d~0 0)) (.cse9 (* (+ c_main_~q~0 .cse8) .cse0))) (and (or (= .cse3 (+ (- 1) .cse9 c_main_~r~0 .cse4)) .cse6 (not .cse10)) (or (and .cse10 .cse7) (= .cse3 (+ .cse9 c_main_~r~0 .cse4))))) (and (not .cse1) .cse2))))))) is different from true [2022-03-19 03:25:59,183 WARN L232 SmtUtils]: Spent 9.39s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:26:58,907 WARN L232 SmtUtils]: Spent 11.53s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:28:18,429 WARN L232 SmtUtils]: Spent 36.56s on a formula simplification that was a NOOP. DAG size: 208 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:30:22,529 WARN L855 $PredicateComparison]: unable to prove that (or (<= c_main_~d~0 c_main_~r~0) (let ((.cse4 (mod c_main_~B~0 4294967296))) (let ((.cse1 (mod c_main_~A~0 4294967296)) (.cse20 (div c_main_~d~0 2)) (.cse23 (= (mod c_main_~d~0 2) 0)) (.cse17 (* c_main_~q~0 .cse4))) (let ((.cse5 (* (- 1) .cse17)) (.cse21 (not .cse23)) (.cse22 (+ .cse20 1)) (.cse19 (= (mod c_main_~p~0 2) 0)) (.cse24 (< c_main_~p~0 0)) (.cse25 (* (- 1) .cse1)) (.cse3 (div c_main_~p~0 2))) (and (let ((.cse16 (+ .cse3 1))) (let ((.cse15 (* .cse16 .cse4))) (let ((.cse18 (+ .cse25 .cse15 c_main_~r~0 .cse17))) (or (let ((.cse10 (div .cse18 2)) (.cse11 (= (mod (+ .cse1 .cse15 c_main_~r~0 .cse17) 2) 0)) (.cse2 (div .cse16 2))) (let ((.cse0 (= (mod .cse16 2) 0)) (.cse7 (* (- 1) .cse15)) (.cse8 (* (- 1) .cse2)) (.cse9 (not .cse11)) (.cse12 (+ .cse10 1))) (and (let ((.cse6 (* .cse2 .cse4))) (or (not .cse0) (and (= .cse1 (+ (- 1) (* (+ c_main_~q~0 (div .cse2 2) 2 .cse3) .cse4) .cse5 .cse1 (* (- 1) (div .cse6 2)) .cse7)) (not (= (mod .cse6 2) 0))) (<= (div .cse8 (- 2)) (+ (div (+ (- 2) .cse2) 2) 1)) (and (or .cse9 (not (= .cse6 .cse10))) (or .cse11 (not (= .cse6 .cse12)))))) (let ((.cse13 (+ .cse2 1))) (let ((.cse14 (* .cse4 .cse13))) (or .cse0 (and (= .cse1 (+ (- 1) .cse5 .cse1 (* (+ c_main_~q~0 2 (div .cse13 2) .cse3) .cse4) (* (- 1) (div .cse14 2)) .cse7)) (not (= (mod .cse14 2) 0))) (<= (div (+ (- 1) .cse8) (- 2)) (+ (div (+ (- 1) .cse2) 2) 1)) (and (or .cse9 (not (= .cse14 .cse10))) (or .cse11 (not (= .cse14 .cse12)))))))))) .cse19 (and (or (not (= .cse18 .cse20)) .cse21) (or (not (= .cse18 .cse22)) .cse23)) (not .cse24))))) (let ((.cse42 (* .cse4 .cse3))) (let ((.cse46 (+ .cse25 c_main_~r~0 .cse17 .cse42))) (or (let ((.cse33 (div .cse3 2)) (.cse28 (div .cse46 2)) (.cse31 (= (mod (+ .cse1 c_main_~r~0 .cse17 .cse42) 2) 0))) (let ((.cse34 (= (mod .cse3 2) 0)) (.cse26 (< .cse3 0)) (.cse29 (not .cse31)) (.cse30 (+ .cse28 1)) (.cse38 (* (- 1) .cse42)) (.cse32 (* (- 1) .cse33))) (and (let ((.cse39 (+ .cse33 1))) (let ((.cse27 (* .cse39 .cse4))) (or (not .cse26) (and (or (not (= .cse27 .cse28)) .cse29) (or (not (= .cse27 .cse30)) .cse31)) (<= (div (+ (- 1) .cse32) (- 2)) (+ (div (+ (- 1) .cse33) 2) 1)) .cse34 (let ((.cse36 (* (- 1) (div .cse27 2))) (.cse37 (* (+ c_main_~q~0 (div .cse39 2) .cse3 1) .cse4)) (.cse35 (= (mod .cse27 2) 0))) (and (or (not .cse35) (= (+ .cse5 .cse1 .cse36 .cse37 .cse38) .cse1)) (or (= .cse1 (+ (- 1) .cse5 .cse1 .cse36 .cse37 .cse38)) .cse35)))))) (let ((.cse40 (* .cse4 .cse33))) (or (and (not .cse34) .cse26) (let ((.cse41 (< (+ c_main_~r~0 .cse17 .cse42) .cse1))) (and (or (not (= .cse28 .cse40)) (and .cse41 .cse29)) (or (not .cse41) (not (= .cse40 .cse30)) .cse31))) (= .cse33 1) (let ((.cse45 (= (mod .cse40 2) 0)) (.cse43 (* (- 1) (div .cse40 2))) (.cse44 (* .cse4 (+ c_main_~q~0 (div .cse33 2) .cse3 1)))) (and (or (= (+ (- 1) .cse43 .cse5 .cse1 .cse38 .cse44) .cse1) .cse45) (or (not .cse45) (= .cse1 (+ .cse43 .cse5 .cse1 .cse38 .cse44))))) (<= (div .cse32 (- 2)) (+ (div (+ (- 2) .cse33) 2) 1))))))) (let ((.cse47 (< c_main_~d~0 0))) (and (or (not (= .cse46 .cse20)) (and .cse47 .cse21)) (or (not (= .cse22 .cse46)) .cse23 (not .cse47)))) (and (not .cse19) .cse24))))))))) is different from true