/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-scaling/hard-u_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 05:02:26,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 05:02:26,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 05:02:26,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 05:02:26,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 05:02:26,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 05:02:26,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 05:02:26,554 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 05:02:26,567 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 05:02:26,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 05:02:26,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 05:02:26,568 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 05:02:26,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 05:02:26,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 05:02:26,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 05:02:26,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 05:02:26,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 05:02:26,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 05:02:26,569 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 05:02:26,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 05:02:26,569 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 05:02:26,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 05:02:26,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 05:02:26,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 05:02:26,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 05:02:26,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 05:02:26,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 05:02:26,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 05:02:26,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 05:02:26,570 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 05:02:26,570 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 05:02:26,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 05:02:26,570 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 05:02:26,570 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 05:02:26,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 05:02:26,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 05:02:26,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 05:02:26,794 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 05:02:26,795 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 05:02:26,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound10.c [2022-03-19 05:02:26,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc1f18818/431427972c41461db1d195c56174dbf2/FLAGd66f6a0e3 [2022-03-19 05:02:27,249 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 05:02:27,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound10.c [2022-03-19 05:02:27,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc1f18818/431427972c41461db1d195c56174dbf2/FLAGd66f6a0e3 [2022-03-19 05:02:27,264 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc1f18818/431427972c41461db1d195c56174dbf2 [2022-03-19 05:02:27,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 05:02:27,268 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 05:02:27,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 05:02:27,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 05:02:27,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 05:02:27,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 05:02:27" (1/1) ... [2022-03-19 05:02:27,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@244584e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:02:27, skipping insertion in model container [2022-03-19 05:02:27,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 05:02:27" (1/1) ... [2022-03-19 05:02:27,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 05:02:27,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 05:02:27,454 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound10.c[537,550] [2022-03-19 05:02:27,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 05:02:27,495 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 05:02:27,510 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound10.c[537,550] [2022-03-19 05:02:27,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 05:02:27,541 INFO L208 MainTranslator]: Completed translation [2022-03-19 05:02:27,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:02:27 WrapperNode [2022-03-19 05:02:27,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 05:02:27,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 05:02:27,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 05:02:27,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 05:02:27,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:02:27" (1/1) ... [2022-03-19 05:02:27,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:02:27" (1/1) ... [2022-03-19 05:02:27,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:02:27" (1/1) ... [2022-03-19 05:02:27,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:02:27" (1/1) ... [2022-03-19 05:02:27,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:02:27" (1/1) ... [2022-03-19 05:02:27,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:02:27" (1/1) ... [2022-03-19 05:02:27,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:02:27" (1/1) ... [2022-03-19 05:02:27,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 05:02:27,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 05:02:27,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 05:02:27,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 05:02:27,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:02:27" (1/1) ... [2022-03-19 05:02:27,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 05:02:27,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:02:27,618 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 05:02:27,623 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 05:02:27,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 05:02:27,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 05:02:27,648 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 05:02:27,648 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 05:02:27,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 05:02:27,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 05:02:27,648 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 05:02:27,648 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 05:02:27,648 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 05:02:27,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 05:02:27,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 05:02:27,649 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 05:02:27,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 05:02:27,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 05:02:27,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 05:02:27,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 05:02:27,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 05:02:27,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 05:02:27,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 05:02:27,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 05:02:27,707 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 05:02:27,709 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 05:02:27,824 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 05:02:27,829 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 05:02:27,830 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 05:02:27,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 05:02:27 BoogieIcfgContainer [2022-03-19 05:02:27,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 05:02:27,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 05:02:27,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 05:02:27,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 05:02:27,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 05:02:27" (1/3) ... [2022-03-19 05:02:27,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694d8cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 05:02:27, skipping insertion in model container [2022-03-19 05:02:27,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:02:27" (2/3) ... [2022-03-19 05:02:27,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694d8cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 05:02:27, skipping insertion in model container [2022-03-19 05:02:27,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 05:02:27" (3/3) ... [2022-03-19 05:02:27,838 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound10.c [2022-03-19 05:02:27,842 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 05:02:27,842 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 05:02:27,875 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 05:02:27,881 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 05:02:27,881 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 05:02:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 05:02:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 05:02:27,902 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:27,903 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:02:27,904 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:27,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:27,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2022-03-19 05:02:27,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:27,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1406607096] [2022-03-19 05:02:27,954 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:02:27,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 2 times [2022-03-19 05:02:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:27,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245292060] [2022-03-19 05:02:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:27,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:02:28,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 05:02:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:02:28,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 05:02:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:02:28,147 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 05:02:28,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:02:28,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245292060] [2022-03-19 05:02:28,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245292060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:28,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:28,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 05:02:28,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:02:28,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1406607096] [2022-03-19 05:02:28,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1406607096] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:28,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:28,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 05:02:28,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717659026] [2022-03-19 05:02:28,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:02:28,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 05:02:28,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 05:02:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 05:02:28,184 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 05:02:28,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:02:28,313 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-03-19 05:02:28,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 05:02:28,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 18 [2022-03-19 05:02:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:02:28,329 INFO L225 Difference]: With dead ends: 66 [2022-03-19 05:02:28,329 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 05:02:28,333 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 05:02:28,338 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:02:28,340 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:02:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 05:02:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-19 05:02:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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 05:02:28,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-19 05:02:28,390 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-19 05:02:28,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:02:28,390 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-19 05:02:28,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 05:02:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-19 05:02:28,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 05:02:28,392 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:28,392 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:02:28,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 05:02:28,393 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:28,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:28,394 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2022-03-19 05:02:28,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:28,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [832506027] [2022-03-19 05:02:28,404 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:02:28,404 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 2 times [2022-03-19 05:02:28,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:28,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279774761] [2022-03-19 05:02:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:28,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:02:28,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 05:02:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:02:28,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 05:02:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:02:28,497 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 05:02:28,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:02:28,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279774761] [2022-03-19 05:02:28,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279774761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:28,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:28,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:02:28,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:02:28,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [832506027] [2022-03-19 05:02:28,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [832506027] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:28,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:28,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:02:28,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284983858] [2022-03-19 05:02:28,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:02:28,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:02:28,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:28,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:02:28,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:02:28,500 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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 05:02:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:02:28,690 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-03-19 05:02:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 05:02:28,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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 18 [2022-03-19 05:02:28,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:02:28,692 INFO L225 Difference]: With dead ends: 47 [2022-03-19 05:02:28,692 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 05:02:28,692 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:02:28,693 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:02:28,694 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:02:28,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 05:02:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-03-19 05:02:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 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 05:02:28,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-19 05:02:28,708 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-03-19 05:02:28,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:02:28,708 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-19 05:02:28,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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 05:02:28,708 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-19 05:02:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 05:02:28,709 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:28,710 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:02:28,710 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 05:02:28,710 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:28,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:28,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2022-03-19 05:02:28,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:28,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1194332572] [2022-03-19 05:02:28,713 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:02:28,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 2 times [2022-03-19 05:02:28,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:28,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448894492] [2022-03-19 05:02:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:28,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:28,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:02:28,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630549703] [2022-03-19 05:02:28,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:02:28,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:02:28,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:02:28,745 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 05:02:28,746 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 05:02:28,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 05:02:28,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:02:28,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 05:02:28,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:02:28,932 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 05:02:28,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:02:28,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:02:28,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448894492] [2022-03-19 05:02:28,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:02:28,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630549703] [2022-03-19 05:02:28,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630549703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:28,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:28,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 05:02:28,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:02:28,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1194332572] [2022-03-19 05:02:28,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1194332572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:28,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:28,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 05:02:28,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497953221] [2022-03-19 05:02:28,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:02:28,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 05:02:28,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:28,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 05:02:28,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 05:02:28,939 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 05:02:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:02:28,967 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-03-19 05:02:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 05:02:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-19 05:02:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:02:28,971 INFO L225 Difference]: With dead ends: 52 [2022-03-19 05:02:28,971 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 05:02:28,971 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 05:02:28,974 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:02:28,974 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:02:28,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 05:02:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-19 05:02:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 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 05:02:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-03-19 05:02:28,989 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-03-19 05:02:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:02:28,990 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-03-19 05:02:28,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 05:02:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-03-19 05:02:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 05:02:28,991 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:28,991 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, 1] [2022-03-19 05:02:29,020 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 05:02:29,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:02:29,208 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:29,208 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2022-03-19 05:02:29,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:29,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1100633797] [2022-03-19 05:02:29,209 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:02:29,209 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 2 times [2022-03-19 05:02:29,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:29,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035477883] [2022-03-19 05:02:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:29,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:02:29,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 05:02:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:02:29,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 05:02:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:02:29,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 05:02:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:02:29,334 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 05:02:29,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:02:29,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035477883] [2022-03-19 05:02:29,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035477883] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:29,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:29,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:02:29,335 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:02:29,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1100633797] [2022-03-19 05:02:29,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1100633797] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:29,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:29,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:02:29,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885155332] [2022-03-19 05:02:29,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:02:29,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:02:29,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:02:29,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:02:29,353 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 05:02:29,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:02:29,520 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-19 05:02:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 05:02:29,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 23 [2022-03-19 05:02:29,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:02:29,522 INFO L225 Difference]: With dead ends: 52 [2022-03-19 05:02:29,522 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 05:02:29,522 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 05:02:29,523 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:02:29,524 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:02:29,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 05:02:29,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-19 05:02:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 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 05:02:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-19 05:02:29,540 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-03-19 05:02:29,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:02:29,542 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-19 05:02:29,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 05:02:29,542 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-19 05:02:29,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 05:02:29,544 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:29,544 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, 1] [2022-03-19 05:02:29,544 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 05:02:29,544 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:29,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2022-03-19 05:02:29,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:29,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [622286963] [2022-03-19 05:02:29,545 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:02:29,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 2 times [2022-03-19 05:02:29,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:29,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459531018] [2022-03-19 05:02:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:29,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:29,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:02:29,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390599897] [2022-03-19 05:02:29,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:02:29,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:02:29,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:02:29,570 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 05:02:29,571 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 05:02:29,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:02:29,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:02:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 05:02:29,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:02:29,705 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 05:02:29,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:02:29,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:02:29,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459531018] [2022-03-19 05:02:29,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:02:29,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390599897] [2022-03-19 05:02:29,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390599897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:29,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:29,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:02:29,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:02:29,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [622286963] [2022-03-19 05:02:29,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [622286963] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:29,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:29,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:02:29,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012026103] [2022-03-19 05:02:29,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:02:29,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:02:29,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:29,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:02:29,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 05:02:29,708 INFO L87 Difference]: Start difference. First operand 42 states and 50 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, (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 05:02:31,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 05:02:31,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:02:31,928 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-03-19 05:02:31,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:02:31,929 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, (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 28 [2022-03-19 05:02:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:02:31,930 INFO L225 Difference]: With dead ends: 59 [2022-03-19 05:02:31,930 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 05:02:31,931 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:02:31,932 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:02:31,932 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 05:02:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 05:02:31,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-19 05:02:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 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 05:02:31,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-03-19 05:02:31,943 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-03-19 05:02:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:02:31,943 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-03-19 05:02:31,943 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, (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 05:02:31,943 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-03-19 05:02:31,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 05:02:31,944 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:31,944 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, 1, 1] [2022-03-19 05:02:31,970 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 05:02:32,159 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 05:02:32,160 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2022-03-19 05:02:32,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:32,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1996155832] [2022-03-19 05:02:32,161 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:02:32,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 2 times [2022-03-19 05:02:32,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:32,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952375205] [2022-03-19 05:02:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:32,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:32,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:02:32,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250966966] [2022-03-19 05:02:32,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:02:32,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:02:32,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:02:32,174 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 05:02:32,204 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 05:02:32,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:02:32,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:02:32,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 05:02:32,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:02:32,350 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 05:02:32,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:02:32,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:02:32,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952375205] [2022-03-19 05:02:32,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:02:32,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250966966] [2022-03-19 05:02:32,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250966966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:32,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:32,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:02:32,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:02:32,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1996155832] [2022-03-19 05:02:32,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1996155832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:32,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:32,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:02:32,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063688404] [2022-03-19 05:02:32,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:02:32,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:02:32,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:32,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:02:32,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 05:02:32,353 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 05:02:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:02:32,399 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-03-19 05:02:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:02:32,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-03-19 05:02:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:02:32,401 INFO L225 Difference]: With dead ends: 76 [2022-03-19 05:02:32,401 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 05:02:32,401 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 05:02:32,402 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:02:32,403 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:02:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 05:02:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-19 05:02:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 05:02:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-03-19 05:02:32,414 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-03-19 05:02:32,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:02:32,414 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-03-19 05:02:32,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 05:02:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-03-19 05:02:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 05:02:32,415 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:32,415 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, 1, 1] [2022-03-19 05:02:32,443 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 05:02:32,631 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 05:02:32,632 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:32,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2022-03-19 05:02:32,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:32,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1059804500] [2022-03-19 05:02:32,633 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:02:32,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 2 times [2022-03-19 05:02:32,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:32,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468673693] [2022-03-19 05:02:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:32,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:32,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:02:32,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364614173] [2022-03-19 05:02:32,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:02:32,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:02:32,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:02:32,648 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 05:02:32,649 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 05:02:32,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:02:32,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:02:32,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 05:02:32,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:02:32,921 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 05:02:32,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:02:32,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:02:32,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468673693] [2022-03-19 05:02:32,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:02:32,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364614173] [2022-03-19 05:02:32,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364614173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:32,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:32,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:02:32,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:02:32,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1059804500] [2022-03-19 05:02:32,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1059804500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:32,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:32,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:02:32,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32733169] [2022-03-19 05:02:32,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:02:32,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:02:32,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:32,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:02:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:02:32,924 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 05:02:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:02:33,076 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-03-19 05:02:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 05:02:33,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-19 05:02:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:02:33,078 INFO L225 Difference]: With dead ends: 82 [2022-03-19 05:02:33,078 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 05:02:33,078 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 05:02:33,079 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:02:33,079 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 189 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:02:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 05:02:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-19 05:02:33,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 05:02:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-03-19 05:02:33,090 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-03-19 05:02:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:02:33,090 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-03-19 05:02:33,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 05:02:33,091 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-03-19 05:02:33,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 05:02:33,096 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:33,096 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:02:33,121 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 05:02:33,296 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 05:02:33,296 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:33,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2022-03-19 05:02:33,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:33,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1195156201] [2022-03-19 05:02:33,321 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:02:33,322 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:02:33,322 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:02:33,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 2 times [2022-03-19 05:02:33,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:33,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175961288] [2022-03-19 05:02:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:33,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:33,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:02:33,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796388200] [2022-03-19 05:02:33,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:02:33,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:02:33,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:02:33,356 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 05:02:33,358 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 05:02:33,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 05:02:33,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:02:33,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 05:02:33,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:02:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 05:02:33,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:02:33,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:02:33,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175961288] [2022-03-19 05:02:33,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:02:33,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796388200] [2022-03-19 05:02:33,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796388200] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:33,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:33,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:02:33,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:02:33,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1195156201] [2022-03-19 05:02:33,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1195156201] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:33,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:33,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:02:33,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751851945] [2022-03-19 05:02:33,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:02:33,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:02:33,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:33,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:02:33,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 05:02:33,578 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 05:02:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:02:33,652 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2022-03-19 05:02:33,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:02:33,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 38 [2022-03-19 05:02:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:02:33,657 INFO L225 Difference]: With dead ends: 92 [2022-03-19 05:02:33,658 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 05:02:33,658 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:02:33,659 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:02:33,659 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:02:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 05:02:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-03-19 05:02:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 59 states have internal predecessors, (69), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 05:02:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2022-03-19 05:02:33,680 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 38 [2022-03-19 05:02:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:02:33,680 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2022-03-19 05:02:33,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 05:02:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2022-03-19 05:02:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 05:02:33,681 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:33,682 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:02:33,702 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 05:02:33,891 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 05:02:33,892 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:33,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:33,892 INFO L85 PathProgramCache]: Analyzing trace with hash 817878903, now seen corresponding path program 1 times [2022-03-19 05:02:33,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:33,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [702374990] [2022-03-19 05:02:33,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:02:33,900 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:02:33,900 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:02:33,900 INFO L85 PathProgramCache]: Analyzing trace with hash 817878903, now seen corresponding path program 2 times [2022-03-19 05:02:33,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:33,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252641417] [2022-03-19 05:02:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:33,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:33,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:02:33,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731751885] [2022-03-19 05:02:33,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:02:33,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:02:33,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:02:33,911 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 05:02:33,916 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 05:02:33,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:02:33,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:02:33,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 05:02:33,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:02:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 05:02:34,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:02:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 05:02:34,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:02:34,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252641417] [2022-03-19 05:02:34,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:02:34,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731751885] [2022-03-19 05:02:34,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731751885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:02:34,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:02:34,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 05:02:34,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:02:34,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [702374990] [2022-03-19 05:02:34,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [702374990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:34,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:34,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:02:34,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689680762] [2022-03-19 05:02:34,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:02:34,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:02:34,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:34,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:02:34,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 05:02:34,234 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 05:02:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:02:34,285 INFO L93 Difference]: Finished difference Result 116 states and 147 transitions. [2022-03-19 05:02:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 05:02:34,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2022-03-19 05:02:34,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:02:34,286 INFO L225 Difference]: With dead ends: 116 [2022-03-19 05:02:34,287 INFO L226 Difference]: Without dead ends: 91 [2022-03-19 05:02:34,287 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-19 05:02:34,288 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:02:34,288 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 136 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:02:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-19 05:02:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-19 05:02:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 61 states have internal predecessors, (71), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 05:02:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-03-19 05:02:34,301 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 43 [2022-03-19 05:02:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:02:34,301 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-03-19 05:02:34,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 05:02:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-03-19 05:02:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 05:02:34,302 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:34,302 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 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 05:02:34,327 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 05:02:34,517 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 05:02:34,518 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:34,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2022-03-19 05:02:34,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:34,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2025132142] [2022-03-19 05:02:34,523 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:02:34,523 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:02:34,523 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:02:34,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 2 times [2022-03-19 05:02:34,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:34,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539511338] [2022-03-19 05:02:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:34,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:34,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:02:34,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821400458] [2022-03-19 05:02:34,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:02:34,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:02:34,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:02:34,532 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 05:02:34,559 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 05:02:34,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:02:34,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:02:34,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 05:02:34,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:02:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 05:02:34,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:02:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 05:02:35,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:02:35,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539511338] [2022-03-19 05:02:35,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:02:35,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821400458] [2022-03-19 05:02:35,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821400458] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 05:02:35,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:02:35,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-19 05:02:35,181 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:02:35,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2025132142] [2022-03-19 05:02:35,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2025132142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:35,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:35,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:02:35,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186615016] [2022-03-19 05:02:35,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:02:35,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:02:35,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:35,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:02:35,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 05:02:35,182 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 05:02:37,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 05:02:39,947 WARN L534 Checker$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 05:02:42,083 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 05:02:44,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 05:02:46,387 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 05:02:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:02:46,418 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2022-03-19 05:02:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:02:46,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-03-19 05:02:46,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:02:46,419 INFO L225 Difference]: With dead ends: 103 [2022-03-19 05:02:46,420 INFO L226 Difference]: Without dead ends: 101 [2022-03-19 05:02:46,420 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 05:02:46,420 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:02:46,421 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 145 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 5 Unknown, 0 Unchecked, 11.2s Time] [2022-03-19 05:02:46,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-19 05:02:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-03-19 05:02:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 67 states have internal predecessors, (77), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 05:02:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2022-03-19 05:02:46,444 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 46 [2022-03-19 05:02:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:02:46,445 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2022-03-19 05:02:46,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 05:02:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2022-03-19 05:02:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 05:02:46,446 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:46,446 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:02:46,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 05:02:46,646 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 05:02:46,647 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:46,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:46,647 INFO L85 PathProgramCache]: Analyzing trace with hash -399036107, now seen corresponding path program 1 times [2022-03-19 05:02:46,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:46,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1148419542] [2022-03-19 05:02:46,648 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:02:46,648 INFO L85 PathProgramCache]: Analyzing trace with hash -399036107, now seen corresponding path program 2 times [2022-03-19 05:02:46,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:46,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641239723] [2022-03-19 05:02:46,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:46,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:46,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:02:46,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565954186] [2022-03-19 05:02:46,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:02:46,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:02:46,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:02:46,658 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 05:02:46,660 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 05:02:46,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:02:46,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:02:46,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 05:02:46,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:02:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 05:02:46,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:02:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 05:02:47,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:02:47,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641239723] [2022-03-19 05:02:47,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:02:47,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565954186] [2022-03-19 05:02:47,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565954186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:02:47,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:02:47,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 05:02:47,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:02:47,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1148419542] [2022-03-19 05:02:47,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1148419542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:47,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:47,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:02:47,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536270292] [2022-03-19 05:02:47,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:02:47,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:02:47,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:02:47,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:02:47,011 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 05:02:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:02:47,223 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2022-03-19 05:02:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 05:02:47,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2022-03-19 05:02:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:02:47,224 INFO L225 Difference]: With dead ends: 145 [2022-03-19 05:02:47,224 INFO L226 Difference]: Without dead ends: 127 [2022-03-19 05:02:47,225 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-19 05:02:47,225 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 19 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:02:47,226 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 150 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 05:02:47,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-19 05:02:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-03-19 05:02:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 87 states have internal predecessors, (99), 26 states have call successors, (26), 17 states have call predecessors, (26), 16 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 05:02:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2022-03-19 05:02:47,247 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 50 [2022-03-19 05:02:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:02:47,247 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2022-03-19 05:02:47,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 05:02:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2022-03-19 05:02:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 05:02:47,248 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:47,249 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:02:47,277 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 05:02:47,477 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 05:02:47,478 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:47,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:47,478 INFO L85 PathProgramCache]: Analyzing trace with hash -397308229, now seen corresponding path program 1 times [2022-03-19 05:02:47,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:47,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1730370637] [2022-03-19 05:02:47,479 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:02:47,479 INFO L85 PathProgramCache]: Analyzing trace with hash -397308229, now seen corresponding path program 2 times [2022-03-19 05:02:47,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:47,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781213029] [2022-03-19 05:02:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:47,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:47,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:02:47,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792520866] [2022-03-19 05:02:47,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:02:47,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:02:47,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:02:47,504 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 05:02:47,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process