/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:28:11,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:28:11,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:28:11,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:28:11,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:28:11,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:28:11,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:28:11,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 21:28:11,946 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:28:11,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:28:11,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:28:11,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:28:11,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:28:11,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:28:11,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:28:11,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:28:11,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:28:11,949 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:28:11,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:28:11,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:28:11,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:28:11,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:28:11,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:28:11,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:28:11,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:28:11,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:28:11,950 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:28:11,951 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:28:11,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:28:11,951 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:28:11,951 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:28:12,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:28:12,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:28:12,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:28:12,139 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:28:12,142 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:28:12,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound100.c [2022-04-06 21:28:12,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29cd5e92c/b2e82b79cdcb4279badf2d9967e34628/FLAG7e0b85165 [2022-04-06 21:28:12,611 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:28:12,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound100.c [2022-04-06 21:28:12,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29cd5e92c/b2e82b79cdcb4279badf2d9967e34628/FLAG7e0b85165 [2022-04-06 21:28:12,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29cd5e92c/b2e82b79cdcb4279badf2d9967e34628 [2022-04-06 21:28:12,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:28:12,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:28:12,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:28:12,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:28:12,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:28:12,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:28:12" (1/1) ... [2022-04-06 21:28:12,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7596063e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:28:12, skipping insertion in model container [2022-04-06 21:28:12,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:28:12" (1/1) ... [2022-04-06 21:28:12,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:28:12,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:28:12,785 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/bresenham-ll_unwindbound100.c[597,610] [2022-04-06 21:28:12,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:28:12,824 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:28:12,836 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/bresenham-ll_unwindbound100.c[597,610] [2022-04-06 21:28:12,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:28:12,867 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:28:12,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:28:12 WrapperNode [2022-04-06 21:28:12,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:28:12,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:28:12,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:28:12,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:28:12,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:28:12" (1/1) ... [2022-04-06 21:28:12,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:28:12" (1/1) ... [2022-04-06 21:28:12,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:28:12" (1/1) ... [2022-04-06 21:28:12,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:28:12" (1/1) ... [2022-04-06 21:28:12,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:28:12" (1/1) ... [2022-04-06 21:28:12,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:28:12" (1/1) ... [2022-04-06 21:28:12,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:28:12" (1/1) ... [2022-04-06 21:28:12,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:28:12,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:28:12,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:28:12,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:28:12,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:28:12" (1/1) ... [2022-04-06 21:28:12,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:28:12,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:12,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 21:28:12,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 21:28:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:28:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:28:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:28:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 21:28:12,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 21:28:12,947 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:28:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 21:28:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:28:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:28:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:28:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 21:28:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 21:28:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 21:28:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:28:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:28:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:28:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:28:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:28:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:28:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:28:12,993 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:28:12,994 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:28:13,108 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:28:13,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:28:13,113 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 21:28:13,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:28:13 BoogieIcfgContainer [2022-04-06 21:28:13,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:28:13,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:28:13,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:28:13,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:28:13,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:28:12" (1/3) ... [2022-04-06 21:28:13,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73eb72ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:28:13, skipping insertion in model container [2022-04-06 21:28:13,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:28:12" (2/3) ... [2022-04-06 21:28:13,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73eb72ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:28:13, skipping insertion in model container [2022-04-06 21:28:13,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:28:13" (3/3) ... [2022-04-06 21:28:13,121 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound100.c [2022-04-06 21:28:13,124 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:28:13,125 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:28:13,162 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:28:13,168 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 21:28:13,168 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:28:13,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:28:13,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 21:28:13,186 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:13,186 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:13,187 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:13,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2022-04-06 21:28:13,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:13,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1531862987] [2022-04-06 21:28:13,206 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:28:13,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 2 times [2022-04-06 21:28:13,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:13,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050787166] [2022-04-06 21:28:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:13,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:28:13,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:28:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:28:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:28:13,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:13,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050787166] [2022-04-06 21:28:13,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050787166] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:13,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:13,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:28:13,402 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:13,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1531862987] [2022-04-06 21:28:13,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1531862987] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:13,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:13,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:28:13,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319334551] [2022-04-06 21:28:13,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:13,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 21:28:13,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:13,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 21:28:13,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:28:13,430 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:28:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:13,494 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-04-06 21:28:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 21:28:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 21:28:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:13,503 INFO L225 Difference]: With dead ends: 45 [2022-04-06 21:28:13,503 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 21:28:13,506 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:28:13,509 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:13,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:28:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 21:28:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-04-06 21:28:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:28:13,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-04-06 21:28:13,552 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-04-06 21:28:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:13,552 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-04-06 21:28:13,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:28:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-04-06 21:28:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 21:28:13,553 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:13,553 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:13,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:28:13,554 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:13,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2022-04-06 21:28:13,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:13,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1298635416] [2022-04-06 21:28:13,556 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:28:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 2 times [2022-04-06 21:28:13,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:13,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052196025] [2022-04-06 21:28:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:13,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:13,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:13,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284984950] [2022-04-06 21:28:13,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:28:13,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:13,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:13,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:13,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 21:28:13,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 21:28:13,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:13,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 21:28:13,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:28:13,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:28:13,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:13,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052196025] [2022-04-06 21:28:13,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:13,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284984950] [2022-04-06 21:28:13,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284984950] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:13,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:13,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:28:13,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:13,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1298635416] [2022-04-06 21:28:13,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1298635416] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:13,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:13,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:28:13,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249049540] [2022-04-06 21:28:13,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:13,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:28:13,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:13,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:28:13,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:28:13,853 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:28:14,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:14,004 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-04-06 21:28:14,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:28:14,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 21:28:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:14,007 INFO L225 Difference]: With dead ends: 34 [2022-04-06 21:28:14,007 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 21:28:14,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:28:14,012 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:14,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:28:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 21:28:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-06 21:28:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-04-06 21:28:14,023 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-04-06 21:28:14,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:14,024 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-04-06 21:28:14,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:28:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-04-06 21:28:14,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 21:28:14,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:14,025 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:14,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:14,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:14,256 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:14,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:14,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 1 times [2022-04-06 21:28:14,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:14,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1694359419] [2022-04-06 21:28:14,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:14,273 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:14,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 2 times [2022-04-06 21:28:14,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:14,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205807349] [2022-04-06 21:28:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:14,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:14,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:14,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542639980] [2022-04-06 21:28:14,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:28:14,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:14,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:14,319 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:14,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 21:28:14,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:28:14,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:14,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 21:28:14,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:28:14,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:28:14,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:14,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205807349] [2022-04-06 21:28:14,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:14,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542639980] [2022-04-06 21:28:14,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542639980] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:14,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:14,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-04-06 21:28:14,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:14,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1694359419] [2022-04-06 21:28:14,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1694359419] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:14,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:14,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:28:14,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171211272] [2022-04-06 21:28:14,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:14,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:28:14,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:14,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:28:14,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:28:14,730 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:28:14,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:14,839 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-04-06 21:28:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:28:14,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-04-06 21:28:14,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:14,841 INFO L225 Difference]: With dead ends: 44 [2022-04-06 21:28:14,841 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 21:28:14,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:28:14,843 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:14,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 106 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:28:14,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 21:28:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-04-06 21:28:14,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:28:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-04-06 21:28:14,852 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2022-04-06 21:28:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:14,852 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-04-06 21:28:14,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:28:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-04-06 21:28:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 21:28:14,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:14,853 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:14,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 21:28:15,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 21:28:15,068 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:15,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:15,068 INFO L85 PathProgramCache]: Analyzing trace with hash 794559142, now seen corresponding path program 1 times [2022-04-06 21:28:15,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:15,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1588680286] [2022-04-06 21:28:15,072 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:15,073 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:15,073 INFO L85 PathProgramCache]: Analyzing trace with hash 794559142, now seen corresponding path program 2 times [2022-04-06 21:28:15,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:15,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476352109] [2022-04-06 21:28:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:15,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:15,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:15,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747564383] [2022-04-06 21:28:15,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:28:15,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:15,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:15,084 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:15,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 21:28:15,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:28:15,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:15,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 21:28:15,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:28:15,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:28:15,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:15,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476352109] [2022-04-06 21:28:15,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:15,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747564383] [2022-04-06 21:28:15,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747564383] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:15,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:15,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-04-06 21:28:15,409 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:15,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1588680286] [2022-04-06 21:28:15,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1588680286] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:15,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:15,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:28:15,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499201608] [2022-04-06 21:28:15,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:15,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:28:15,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:15,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:28:15,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:28:15,417 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:28:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:15,524 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-04-06 21:28:15,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:28:15,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-04-06 21:28:15,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:15,526 INFO L225 Difference]: With dead ends: 53 [2022-04-06 21:28:15,526 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 21:28:15,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:28:15,527 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:15,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 111 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:28:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 21:28:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-04-06 21:28:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:28:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-04-06 21:28:15,538 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 22 [2022-04-06 21:28:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:15,538 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-04-06 21:28:15,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:28:15,538 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-04-06 21:28:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 21:28:15,539 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:15,539 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:15,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:15,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:15,762 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:15,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:15,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 1 times [2022-04-06 21:28:15,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:15,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1475017386] [2022-04-06 21:28:15,766 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:15,766 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:15,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 2 times [2022-04-06 21:28:15,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:15,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213948182] [2022-04-06 21:28:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:15,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:15,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:15,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507450054] [2022-04-06 21:28:15,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:28:15,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:15,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:15,782 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:15,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 21:28:15,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:28:15,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:15,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:28:15,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:28:15,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:28:15,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:15,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213948182] [2022-04-06 21:28:15,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:15,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507450054] [2022-04-06 21:28:15,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507450054] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:15,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:15,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 21:28:15,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:15,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1475017386] [2022-04-06 21:28:15,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1475017386] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:15,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:15,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:28:15,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203813166] [2022-04-06 21:28:15,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:15,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:28:15,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:15,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:28:15,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:28:15,927 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:28:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:15,950 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2022-04-06 21:28:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:28:15,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-04-06 21:28:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:15,956 INFO L225 Difference]: With dead ends: 54 [2022-04-06 21:28:15,956 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 21:28:15,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:28:15,958 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:15,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 74 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:28:15,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 21:28:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 21:28:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:28:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-04-06 21:28:15,976 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 23 [2022-04-06 21:28:15,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:15,977 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-04-06 21:28:15,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:28:15,977 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-04-06 21:28:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 21:28:15,978 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:15,978 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:15,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:16,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:16,179 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:16,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:16,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1132431350, now seen corresponding path program 1 times [2022-04-06 21:28:16,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:16,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1682196859] [2022-04-06 21:28:16,183 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:16,184 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:16,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1132431350, now seen corresponding path program 2 times [2022-04-06 21:28:16,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:16,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211262049] [2022-04-06 21:28:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:16,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:16,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:16,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446617049] [2022-04-06 21:28:16,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:28:16,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:16,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:16,194 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:16,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 21:28:16,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:28:16,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:16,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 21:28:16,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:28:16,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:28:16,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:16,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211262049] [2022-04-06 21:28:16,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:16,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446617049] [2022-04-06 21:28:16,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446617049] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:16,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:16,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-04-06 21:28:16,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:16,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1682196859] [2022-04-06 21:28:16,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1682196859] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:16,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:16,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:28:16,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789988457] [2022-04-06 21:28:16,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:16,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:28:16,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:28:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:28:16,992 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:17,243 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-04-06 21:28:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 21:28:17,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-04-06 21:28:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:17,244 INFO L225 Difference]: With dead ends: 57 [2022-04-06 21:28:17,244 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 21:28:17,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:28:17,245 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:17,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 139 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:28:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 21:28:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2022-04-06 21:28:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:28:17,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-04-06 21:28:17,251 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2022-04-06 21:28:17,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:17,251 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-04-06 21:28:17,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:17,252 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-04-06 21:28:17,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 21:28:17,252 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:17,252 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:17,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:17,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:17,453 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:17,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1603460440, now seen corresponding path program 3 times [2022-04-06 21:28:17,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:17,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [203519010] [2022-04-06 21:28:17,457 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:17,457 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:17,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1603460440, now seen corresponding path program 4 times [2022-04-06 21:28:17,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:17,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974760371] [2022-04-06 21:28:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:17,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:17,468 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:17,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091924972] [2022-04-06 21:28:17,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:28:17,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:17,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:17,474 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:17,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 21:28:17,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:28:17,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:17,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 21:28:17,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:28:17,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 21:28:18,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:18,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974760371] [2022-04-06 21:28:18,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:18,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091924972] [2022-04-06 21:28:18,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091924972] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:18,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:18,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 21:28:18,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:18,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [203519010] [2022-04-06 21:28:18,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [203519010] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:18,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:18,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:28:18,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741902266] [2022-04-06 21:28:18,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:18,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:28:18,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:18,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:28:18,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:28:18,049 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:18,232 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-04-06 21:28:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:28:18,232 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-04-06 21:28:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:18,233 INFO L225 Difference]: With dead ends: 63 [2022-04-06 21:28:18,233 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 21:28:18,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:28:18,234 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:18,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 128 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:28:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 21:28:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2022-04-06 21:28:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:28:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-04-06 21:28:18,243 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 32 [2022-04-06 21:28:18,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:18,244 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-04-06 21:28:18,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:18,244 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-04-06 21:28:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 21:28:18,245 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:18,245 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:18,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:18,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:18,460 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:18,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:18,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1882160230, now seen corresponding path program 1 times [2022-04-06 21:28:18,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:18,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1875345119] [2022-04-06 21:28:18,464 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:18,465 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1882160230, now seen corresponding path program 2 times [2022-04-06 21:28:18,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:18,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624291712] [2022-04-06 21:28:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:18,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:18,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607105129] [2022-04-06 21:28:18,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:28:18,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:18,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:18,474 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:18,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 21:28:18,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:28:18,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:18,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 21:28:18,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:18,992 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:28:18,996 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:28:18,998 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:28:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:28:19,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 21:28:20,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:20,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624291712] [2022-04-06 21:28:20,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:20,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607105129] [2022-04-06 21:28:20,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607105129] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:20,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:20,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2022-04-06 21:28:20,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:20,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1875345119] [2022-04-06 21:28:20,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1875345119] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:20,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:20,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:28:20,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956156252] [2022-04-06 21:28:20,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:20,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:28:20,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:20,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:28:20,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:28:20,015 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:20,736 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2022-04-06 21:28:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:28:20,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-04-06 21:28:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:20,737 INFO L225 Difference]: With dead ends: 74 [2022-04-06 21:28:20,737 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 21:28:20,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:28:20,738 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:20,738 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 144 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:28:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 21:28:20,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-04-06 21:28:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 44 states have internal predecessors, (50), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 21:28:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-04-06 21:28:20,750 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 32 [2022-04-06 21:28:20,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:20,750 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-04-06 21:28:20,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:20,750 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-04-06 21:28:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 21:28:20,751 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:20,751 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:20,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:20,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:20,971 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash 697362150, now seen corresponding path program 3 times [2022-04-06 21:28:20,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:20,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [751078701] [2022-04-06 21:28:20,976 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:20,976 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:20,977 INFO L85 PathProgramCache]: Analyzing trace with hash 697362150, now seen corresponding path program 4 times [2022-04-06 21:28:20,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:20,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274155821] [2022-04-06 21:28:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:20,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:20,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:20,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579912656] [2022-04-06 21:28:20,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:28:20,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:20,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:20,993 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:21,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 21:28:21,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:28:21,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:21,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 21:28:21,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:21,380 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:28:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:28:21,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 21:28:22,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:22,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274155821] [2022-04-06 21:28:22,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:22,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579912656] [2022-04-06 21:28:22,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579912656] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:22,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:22,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2022-04-06 21:28:22,340 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:22,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [751078701] [2022-04-06 21:28:22,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [751078701] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:22,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:22,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:28:22,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202743123] [2022-04-06 21:28:22,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:22,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:28:22,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:22,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:28:22,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:28:22,342 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:22,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:22,809 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2022-04-06 21:28:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:28:22,810 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-04-06 21:28:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:22,811 INFO L225 Difference]: With dead ends: 94 [2022-04-06 21:28:22,811 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 21:28:22,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:28:22,812 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:22,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 166 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:28:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 21:28:22,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-04-06 21:28:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:28:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-04-06 21:28:22,829 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 32 [2022-04-06 21:28:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:22,829 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-04-06 21:28:22,830 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:22,830 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-04-06 21:28:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 21:28:22,830 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:22,831 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:22,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 21:28:23,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 21:28:23,043 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:23,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:23,044 INFO L85 PathProgramCache]: Analyzing trace with hash -111984476, now seen corresponding path program 3 times [2022-04-06 21:28:23,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:23,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [33763565] [2022-04-06 21:28:23,047 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:23,047 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:23,047 INFO L85 PathProgramCache]: Analyzing trace with hash -111984476, now seen corresponding path program 4 times [2022-04-06 21:28:23,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:23,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300548546] [2022-04-06 21:28:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:23,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:23,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:23,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862423350] [2022-04-06 21:28:23,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:28:23,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:23,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:23,056 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:23,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 21:28:23,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:28:23,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:23,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 21:28:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:28:23,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:28:23,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300548546] [2022-04-06 21:28:23,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862423350] [2022-04-06 21:28:23,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862423350] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:23,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:23,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-04-06 21:28:23,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:23,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [33763565] [2022-04-06 21:28:23,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [33763565] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:23,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:23,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:28:23,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767189170] [2022-04-06 21:28:23,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:23,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:28:23,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:23,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:28:23,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:28:23,757 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:23,940 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-04-06 21:28:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:28:23,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-04-06 21:28:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:23,942 INFO L225 Difference]: With dead ends: 93 [2022-04-06 21:28:23,942 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 21:28:23,942 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:28:23,943 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:23,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 167 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:28:23,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 21:28:23,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-04-06 21:28:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 67 states have internal predecessors, (75), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 21:28:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2022-04-06 21:28:23,960 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 32 [2022-04-06 21:28:23,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:23,960 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2022-04-06 21:28:23,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:23,960 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2022-04-06 21:28:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 21:28:23,963 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:23,963 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:23,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:24,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 21:28:24,186 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:24,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:24,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1857919347, now seen corresponding path program 1 times [2022-04-06 21:28:24,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:24,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1937897462] [2022-04-06 21:28:24,190 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:24,190 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:24,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1857919347, now seen corresponding path program 2 times [2022-04-06 21:28:24,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:24,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493546471] [2022-04-06 21:28:24,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:24,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:24,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:24,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434140968] [2022-04-06 21:28:24,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:28:24,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:24,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:24,200 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:24,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 21:28:24,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:28:24,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:24,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 21:28:24,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:28:24,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:28:24,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:24,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493546471] [2022-04-06 21:28:24,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:24,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434140968] [2022-04-06 21:28:24,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434140968] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:24,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:24,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 21:28:24,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:24,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1937897462] [2022-04-06 21:28:24,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1937897462] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:24,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:24,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:28:24,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693192753] [2022-04-06 21:28:24,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:24,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:28:24,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:24,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:28:24,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:28:24,416 INFO L87 Difference]: Start difference. First operand 86 states and 95 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, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:24,463 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2022-04-06 21:28:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:28:24,464 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, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-04-06 21:28:24,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:24,465 INFO L225 Difference]: With dead ends: 94 [2022-04-06 21:28:24,466 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 21:28:24,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:28:24,466 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:24,467 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 91 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:28:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 21:28:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-04-06 21:28:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 67 states have internal predecessors, (72), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 21:28:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2022-04-06 21:28:24,487 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 33 [2022-04-06 21:28:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:24,487 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2022-04-06 21:28:24,487 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, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2022-04-06 21:28:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 21:28:24,491 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:24,491 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:24,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:24,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 21:28:24,699 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:24,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1589915704, now seen corresponding path program 3 times [2022-04-06 21:28:24,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:24,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [306288379] [2022-04-06 21:28:24,702 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:24,702 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:24,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1589915704, now seen corresponding path program 4 times [2022-04-06 21:28:24,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:24,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234625632] [2022-04-06 21:28:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:24,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:24,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:24,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955081582] [2022-04-06 21:28:24,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:28:24,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:24,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:24,710 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:24,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 21:28:24,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:28:24,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:24,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 21:28:24,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:28:25,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 21:28:25,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:25,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234625632] [2022-04-06 21:28:25,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:25,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955081582] [2022-04-06 21:28:25,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955081582] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:25,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:25,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-04-06 21:28:25,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:25,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [306288379] [2022-04-06 21:28:25,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [306288379] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:25,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:25,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:28:25,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637861191] [2022-04-06 21:28:25,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:25,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:28:25,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:25,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:28:25,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:28:25,556 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:28:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:25,868 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2022-04-06 21:28:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:28:25,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2022-04-06 21:28:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:25,869 INFO L225 Difference]: With dead ends: 97 [2022-04-06 21:28:25,869 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 21:28:25,870 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:28:25,870 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:25,871 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 181 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:28:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 21:28:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2022-04-06 21:28:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.11864406779661) internal successors, (66), 60 states have internal predecessors, (66), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:28:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2022-04-06 21:28:25,884 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 39 [2022-04-06 21:28:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:25,884 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2022-04-06 21:28:25,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:28:25,884 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2022-04-06 21:28:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 21:28:25,885 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:25,885 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:25,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:26,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 21:28:26,099 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:26,100 INFO L85 PathProgramCache]: Analyzing trace with hash -108827544, now seen corresponding path program 5 times [2022-04-06 21:28:26,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:26,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [572012190] [2022-04-06 21:28:26,102 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:26,102 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:26,102 INFO L85 PathProgramCache]: Analyzing trace with hash -108827544, now seen corresponding path program 6 times [2022-04-06 21:28:26,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:26,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819537010] [2022-04-06 21:28:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:26,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:26,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:26,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488780849] [2022-04-06 21:28:26,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:28:26,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:26,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:26,113 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:26,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 21:28:26,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:28:26,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:26,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 21:28:26,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:26,299 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:28:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:28:26,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:28:27,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:27,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819537010] [2022-04-06 21:28:27,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:27,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488780849] [2022-04-06 21:28:27,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488780849] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:27,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:27,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-04-06 21:28:27,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:27,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [572012190] [2022-04-06 21:28:27,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [572012190] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:27,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:27,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:28:27,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456774993] [2022-04-06 21:28:27,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:27,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:28:27,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:27,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:28:27,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:28:27,157 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:43,321 WARN L232 SmtUtils]: Spent 16.14s on a formula simplification. DAG size of input: 45 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 21:28:45,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:28:49,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:28:53,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:53,742 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-04-06 21:28:53,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:28:53,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-04-06 21:28:53,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:53,744 INFO L225 Difference]: With dead ends: 103 [2022-04-06 21:28:53,745 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 21:28:53,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=78, Invalid=340, Unknown=2, NotChecked=0, Total=420 [2022-04-06 21:28:53,745 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:53,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 76 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-04-06 21:28:53,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 21:28:53,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2022-04-06 21:28:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 68 states have internal predecessors, (75), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 21:28:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-04-06 21:28:53,764 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 42 [2022-04-06 21:28:53,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:53,765 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-04-06 21:28:53,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-04-06 21:28:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 21:28:53,766 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:53,766 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:53,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:53,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 21:28:53,990 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:53,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:53,990 INFO L85 PathProgramCache]: Analyzing trace with hash -918174170, now seen corresponding path program 5 times [2022-04-06 21:28:53,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:53,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499475826] [2022-04-06 21:28:53,993 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:53,994 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:53,994 INFO L85 PathProgramCache]: Analyzing trace with hash -918174170, now seen corresponding path program 6 times [2022-04-06 21:28:53,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:53,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187199224] [2022-04-06 21:28:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:53,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:53,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:54,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298768513] [2022-04-06 21:28:54,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:28:54,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:54,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:54,005 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:54,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 21:28:54,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:28:54,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:54,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 21:28:54,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:54,202 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:28:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:28:54,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:28:54,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:54,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187199224] [2022-04-06 21:28:54,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:54,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298768513] [2022-04-06 21:28:54,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298768513] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:54,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:54,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-04-06 21:28:54,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:54,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499475826] [2022-04-06 21:28:54,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499475826] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:54,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:54,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:28:54,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367932588] [2022-04-06 21:28:54,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:54,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:28:54,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:54,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:28:54,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:28:54,921 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:55,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:55,527 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2022-04-06 21:28:55,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:28:55,527 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-04-06 21:28:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:55,528 INFO L225 Difference]: With dead ends: 103 [2022-04-06 21:28:55,528 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 21:28:55,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:28:55,529 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:55,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 85 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:28:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 21:28:55,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2022-04-06 21:28:55,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 states have internal predecessors, (86), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 21:28:55,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2022-04-06 21:28:55,562 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 42 [2022-04-06 21:28:55,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:55,562 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2022-04-06 21:28:55,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:28:55,563 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2022-04-06 21:28:55,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 21:28:55,563 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:55,563 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:55,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-06 21:28:55,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 21:28:55,764 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:55,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:55,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1427647260, now seen corresponding path program 7 times [2022-04-06 21:28:55,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:55,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [797013218] [2022-04-06 21:28:55,767 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:55,767 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:55,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1427647260, now seen corresponding path program 8 times [2022-04-06 21:28:55,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:55,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690325212] [2022-04-06 21:28:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:55,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:55,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:55,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630042122] [2022-04-06 21:28:55,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:28:55,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:55,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:55,774 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:55,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 21:28:55,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:28:55,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:55,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 21:28:55,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:28:56,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:28:56,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:56,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690325212] [2022-04-06 21:28:56,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:56,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630042122] [2022-04-06 21:28:56,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630042122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:56,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:56,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2022-04-06 21:28:56,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:56,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [797013218] [2022-04-06 21:28:56,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [797013218] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:56,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:56,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:28:56,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179491454] [2022-04-06 21:28:56,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:56,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:28:56,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:56,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:28:56,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:28:56,613 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:28:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:28:56,957 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2022-04-06 21:28:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:28:56,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2022-04-06 21:28:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:28:56,958 INFO L225 Difference]: With dead ends: 113 [2022-04-06 21:28:56,958 INFO L226 Difference]: Without dead ends: 111 [2022-04-06 21:28:56,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:28:56,959 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:28:56,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 239 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:28:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-06 21:28:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-04-06 21:28:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 83 states have internal predecessors, (93), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 21:28:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2022-04-06 21:28:56,992 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 42 [2022-04-06 21:28:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:28:56,992 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2022-04-06 21:28:56,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:28:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2022-04-06 21:28:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 21:28:56,993 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:28:56,993 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:28:57,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 21:28:57,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:57,216 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:28:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:28:57,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1682521956, now seen corresponding path program 9 times [2022-04-06 21:28:57,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:57,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [148387254] [2022-04-06 21:28:57,220 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:28:57,221 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:28:57,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1682521956, now seen corresponding path program 10 times [2022-04-06 21:28:57,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:28:57,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322289876] [2022-04-06 21:28:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:28:57,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:28:57,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:28:57,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229369246] [2022-04-06 21:28:57,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:28:57,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:28:57,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:28:57,241 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:28:57,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 21:28:57,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:28:57,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:28:57,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 21:28:57,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:28:57,418 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:28:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:28:57,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:28:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:28:57,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:28:57,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322289876] [2022-04-06 21:28:57,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:28:57,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229369246] [2022-04-06 21:28:57,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229369246] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:28:57,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:28:57,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-04-06 21:28:57,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:28:57,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [148387254] [2022-04-06 21:28:57,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [148387254] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:28:57,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:28:57,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:28:57,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140767968] [2022-04-06 21:28:57,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:28:57,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:28:57,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:28:57,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:28:57,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:28:57,925 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:29:14,626 WARN L232 SmtUtils]: Spent 16.36s on a formula simplification. DAG size of input: 48 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 21:29:14,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:29:14,880 INFO L93 Difference]: Finished difference Result 150 states and 171 transitions. [2022-04-06 21:29:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:29:14,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2022-04-06 21:29:14,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:29:14,882 INFO L225 Difference]: With dead ends: 150 [2022-04-06 21:29:14,882 INFO L226 Difference]: Without dead ends: 148 [2022-04-06 21:29:14,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:29:14,883 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:29:14,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 197 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:29:14,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-06 21:29:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 107. [2022-04-06 21:29:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 84 states have internal predecessors, (95), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 21:29:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2022-04-06 21:29:14,904 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 42 [2022-04-06 21:29:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:29:14,904 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2022-04-06 21:29:14,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:29:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2022-04-06 21:29:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 21:29:14,905 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:29:14,905 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:29:14,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 21:29:15,105 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 21:29:15,106 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:29:15,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:29:15,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1526027469, now seen corresponding path program 3 times [2022-04-06 21:29:15,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:29:15,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1884911067] [2022-04-06 21:29:15,110 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:29:15,110 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:29:15,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1526027469, now seen corresponding path program 4 times [2022-04-06 21:29:15,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:29:15,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528532062] [2022-04-06 21:29:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:29:15,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:29:15,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:29:15,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31462847] [2022-04-06 21:29:15,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:29:15,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:29:15,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:29:15,117 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:29:15,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 21:29:15,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:29:15,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:29:15,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 21:29:15,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:29:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:29:15,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:29:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:29:15,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:29:15,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528532062] [2022-04-06 21:29:15,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:29:15,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31462847] [2022-04-06 21:29:15,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31462847] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:29:15,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:29:15,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 21:29:15,329 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:29:15,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1884911067] [2022-04-06 21:29:15,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1884911067] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:29:15,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:29:15,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:29:15,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882698087] [2022-04-06 21:29:15,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:29:15,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:29:15,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:29:15,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:29:15,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:29:15,330 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:29:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:29:15,415 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2022-04-06 21:29:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:29:15,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2022-04-06 21:29:15,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:29:15,416 INFO L225 Difference]: With dead ends: 131 [2022-04-06 21:29:15,416 INFO L226 Difference]: Without dead ends: 123 [2022-04-06 21:29:15,416 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:29:15,417 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:29:15,417 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:29:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-06 21:29:15,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2022-04-06 21:29:15,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 95 states have internal predecessors, (106), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:29:15,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2022-04-06 21:29:15,439 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 43 [2022-04-06 21:29:15,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:29:15,439 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2022-04-06 21:29:15,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:29:15,440 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2022-04-06 21:29:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:29:15,440 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:29:15,440 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:29:15,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 21:29:15,640 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 21:29:15,641 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:29:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:29:15,641 INFO L85 PathProgramCache]: Analyzing trace with hash -684010378, now seen corresponding path program 1 times [2022-04-06 21:29:15,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:29:15,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1404696439] [2022-04-06 21:29:15,644 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:29:15,644 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:29:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash -684010378, now seen corresponding path program 2 times [2022-04-06 21:29:15,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:29:15,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373002373] [2022-04-06 21:29:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:29:15,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:29:15,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:29:15,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024931708] [2022-04-06 21:29:15,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:29:15,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:29:15,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:29:15,650 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:29:15,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 21:29:15,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:29:15,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:29:15,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:29:15,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:29:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 21:29:15,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:29:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 21:29:16,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:29:16,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373002373] [2022-04-06 21:29:16,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:29:16,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024931708] [2022-04-06 21:29:16,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024931708] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:29:16,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:29:16,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-04-06 21:29:16,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:29:16,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1404696439] [2022-04-06 21:29:16,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1404696439] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:29:16,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:29:16,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:29:16,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186438309] [2022-04-06 21:29:16,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:29:16,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:29:16,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:29:16,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:29:16,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:29:16,110 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:29:16,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:29:16,297 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2022-04-06 21:29:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:29:16,297 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2022-04-06 21:29:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:29:16,298 INFO L225 Difference]: With dead ends: 136 [2022-04-06 21:29:16,298 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 21:29:16,299 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:29:16,299 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:29:16,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 138 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:29:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 21:29:16,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2022-04-06 21:29:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 97 states have (on average 1.134020618556701) internal successors, (110), 99 states have internal predecessors, (110), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 21:29:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2022-04-06 21:29:16,323 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 49 [2022-04-06 21:29:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:29:16,323 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2022-04-06 21:29:16,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:29:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2022-04-06 21:29:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:29:16,325 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:29:16,325 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:29:16,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 21:29:16,525 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 21:29:16,526 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:29:16,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:29:16,526 INFO L85 PathProgramCache]: Analyzing trace with hash 736401910, now seen corresponding path program 3 times [2022-04-06 21:29:16,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:29:16,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [156244914] [2022-04-06 21:29:16,529 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:29:16,530 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:29:16,530 INFO L85 PathProgramCache]: Analyzing trace with hash 736401910, now seen corresponding path program 4 times [2022-04-06 21:29:16,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:29:16,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323139426] [2022-04-06 21:29:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:29:16,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:29:16,535 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:29:16,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107929094] [2022-04-06 21:29:16,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:29:16,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:29:16,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:29:16,536 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:29:16,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 21:29:16,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:29:16,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:29:16,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 21:29:16,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:29:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 21:29:16,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:29:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 21:29:16,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:29:16,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323139426] [2022-04-06 21:29:16,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:29:16,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107929094] [2022-04-06 21:29:16,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107929094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:29:16,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:29:16,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 21:29:16,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:29:16,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [156244914] [2022-04-06 21:29:16,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [156244914] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:29:16,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:29:17,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:29:17,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508028301] [2022-04-06 21:29:17,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:29:17,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:29:17,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:29:17,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:29:17,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:29:17,001 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:29:17,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:29:17,131 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2022-04-06 21:29:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:29:17,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2022-04-06 21:29:17,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:29:17,132 INFO L225 Difference]: With dead ends: 138 [2022-04-06 21:29:17,132 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 21:29:17,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:29:17,133 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:29:17,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 126 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:29:17,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 21:29:17,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2022-04-06 21:29:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 96 states have internal predecessors, (107), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 21:29:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2022-04-06 21:29:17,157 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 49 [2022-04-06 21:29:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:29:17,157 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2022-04-06 21:29:17,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:29:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2022-04-06 21:29:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:29:17,158 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:29:17,158 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:29:17,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 21:29:17,381 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:29:17,381 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:29:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:29:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1528015880, now seen corresponding path program 5 times [2022-04-06 21:29:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:29:17,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1922436021] [2022-04-06 21:29:17,384 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:29:17,384 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:29:17,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1528015880, now seen corresponding path program 6 times [2022-04-06 21:29:17,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:29:17,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711420127] [2022-04-06 21:29:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:29:17,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:29:17,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:29:17,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461898494] [2022-04-06 21:29:17,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:29:17,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:29:17,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:29:17,391 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:29:17,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 21:29:17,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:29:17,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:29:17,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 21:29:17,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:29:17,654 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:29:17,657 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:29:17,658 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:29:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 21:29:29,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:29:30,201 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:32:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 21:32:24,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:32:24,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711420127] [2022-04-06 21:32:24,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:32:24,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461898494] [2022-04-06 21:32:24,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461898494] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:32:24,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:32:24,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-04-06 21:32:24,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:32:24,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1922436021] [2022-04-06 21:32:24,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1922436021] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:32:24,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:32:24,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:32:24,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386781376] [2022-04-06 21:32:24,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:32:24,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:32:24,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:32:24,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:32:24,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=459, Unknown=9, NotChecked=0, Total=552 [2022-04-06 21:32:24,670 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:32:30,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:32:34,831 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:32:38,697 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:32:40,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:32:42,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:32:44,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:32:46,217 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:32:47,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:32:47,209 INFO L93 Difference]: Finished difference Result 148 states and 165 transitions. [2022-04-06 21:32:47,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:32:47,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2022-04-06 21:32:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:32:47,210 INFO L225 Difference]: With dead ends: 148 [2022-04-06 21:32:47,210 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 21:32:47,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=154, Invalid=827, Unknown=11, NotChecked=0, Total=992 [2022-04-06 21:32:47,211 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 11 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:32:47,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 185 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 356 Invalid, 5 Unknown, 0 Unchecked, 14.5s Time] [2022-04-06 21:32:47,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 21:32:47,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2022-04-06 21:32:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 105 states have internal predecessors, (117), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 21:32:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2022-04-06 21:32:47,234 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 49 [2022-04-06 21:32:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:32:47,234 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2022-04-06 21:32:47,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:32:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2022-04-06 21:32:47,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:32:47,235 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:32:47,235 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:32:47,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-04-06 21:32:47,442 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:32:47,442 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:32:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:32:47,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1387467270, now seen corresponding path program 5 times [2022-04-06 21:32:47,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:32:47,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1974419826] [2022-04-06 21:32:47,445 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:32:47,445 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:32:47,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1387467270, now seen corresponding path program 6 times [2022-04-06 21:32:47,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:32:47,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084285735] [2022-04-06 21:32:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:32:47,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:32:47,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:32:47,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943173162] [2022-04-06 21:32:47,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:32:47,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:32:47,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:32:47,451 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:32:47,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 21:32:47,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:32:47,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:32:47,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 21:32:47,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:32:48,764 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:32:48,768 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:32:48,769 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:32:55,485 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) (<= 0 c_main_~X~0)) is different from false [2022-04-06 21:33:10,803 WARN L232 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-06 21:34:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 21:34:55,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:34:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 21:34:57,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:34:57,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084285735] [2022-04-06 21:34:57,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:34:57,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943173162] [2022-04-06 21:34:57,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943173162] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:34:57,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:34:57,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2022-04-06 21:34:57,301 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:34:57,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1974419826] [2022-04-06 21:34:57,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1974419826] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:34:57,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:34:57,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:34:57,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715455916] [2022-04-06 21:34:57,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:34:57,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:34:57,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:57,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:34:57,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=313, Unknown=1, NotChecked=36, Total=420 [2022-04-06 21:34:57,302 INFO L87 Difference]: Start difference. First operand 132 states and 149 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:35:00,934 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (* c_main_~X~0 c_main_~y~0)) (.cse3 (+ c_main_~X~0 1))) (and (let ((.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) .cse7)) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) (<= 0 c_main_~X~0) (not (<= c_main_~x~0 c_main_~X~0)) (= (+ (* 2 (* c_main_~Y~0 c_main_~x~0)) (* 2 c_main_~Y~0)) (+ (* 2 .cse7) c_main_~v~0 c_main_~X~0)) (<= c_main_~x~0 .cse3))) is different from false [2022-04-06 21:35:01,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:35:01,171 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2022-04-06 21:35:01,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:35:01,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2022-04-06 21:35:01,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:35:01,172 INFO L225 Difference]: With dead ends: 145 [2022-04-06 21:35:01,172 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 21:35:01,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=170, Invalid=648, Unknown=2, NotChecked=110, Total=930 [2022-04-06 21:35:01,173 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:35:01,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 135 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 168 Invalid, 0 Unknown, 25 Unchecked, 0.7s Time] [2022-04-06 21:35:01,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 21:35:01,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 120. [2022-04-06 21:35:01,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.118279569892473) internal successors, (104), 95 states have internal predecessors, (104), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:35:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2022-04-06 21:35:01,197 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 49 [2022-04-06 21:35:01,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:35:01,197 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2022-04-06 21:35:01,197 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:35:01,198 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2022-04-06 21:35:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 21:35:01,198 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:35:01,198 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:35:01,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 21:35:01,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 21:35:01,404 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:35:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:35:01,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1434541020, now seen corresponding path program 11 times [2022-04-06 21:35:01,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:35:01,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [775977622] [2022-04-06 21:35:01,408 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:35:01,408 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:35:01,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1434541020, now seen corresponding path program 12 times [2022-04-06 21:35:01,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:35:01,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594693609] [2022-04-06 21:35:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:35:01,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:35:01,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:35:01,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991764218] [2022-04-06 21:35:01,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:35:01,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:35:01,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:35:01,417 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:35:01,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 21:35:01,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:35:01,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:35:01,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 21:35:01,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:35:03,046 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:35:03,048 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:35:03,051 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:35:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 21:35:06,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:35:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 21:35:07,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:35:07,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594693609] [2022-04-06 21:35:07,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:35:07,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991764218] [2022-04-06 21:35:07,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991764218] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:35:07,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:35:07,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-04-06 21:35:07,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:35:07,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [775977622] [2022-04-06 21:35:07,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [775977622] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:35:07,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:35:07,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:35:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517893400] [2022-04-06 21:35:07,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:35:07,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:35:07,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:35:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:35:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=292, Unknown=1, NotChecked=0, Total=342 [2022-04-06 21:35:07,791 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:35:10,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:35:12,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:35:16,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:35:18,543 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:35:20,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:35:22,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:35:52,309 WARN L232 SmtUtils]: Spent 27.24s on a formula simplification. DAG size of input: 67 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 21:35:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:35:53,142 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2022-04-06 21:35:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:35:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2022-04-06 21:35:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:35:53,143 INFO L225 Difference]: With dead ends: 137 [2022-04-06 21:35:53,143 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 21:35:53,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=87, Invalid=462, Unknown=3, NotChecked=0, Total=552 [2022-04-06 21:35:53,144 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 6 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:35:53,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 133 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 258 Invalid, 6 Unknown, 0 Unchecked, 13.5s Time] [2022-04-06 21:35:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 21:35:53,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 120. [2022-04-06 21:35:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.118279569892473) internal successors, (104), 95 states have internal predecessors, (104), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:35:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2022-04-06 21:35:53,174 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 52 [2022-04-06 21:35:53,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:35:53,174 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2022-04-06 21:35:53,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:35:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2022-04-06 21:35:53,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 21:35:53,175 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:35:53,175 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:35:53,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 21:35:53,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 21:35:53,383 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:35:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:35:53,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1654553692, now seen corresponding path program 13 times [2022-04-06 21:35:53,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:35:53,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1165737733] [2022-04-06 21:35:53,387 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:35:53,387 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:35:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1654553692, now seen corresponding path program 14 times [2022-04-06 21:35:53,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:35:53,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290470467] [2022-04-06 21:35:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:35:53,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:35:53,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:35:53,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566578426] [2022-04-06 21:35:53,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:35:53,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:35:53,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:35:53,393 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:35:53,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 21:35:53,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:35:53,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:35:53,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 21:35:53,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:35:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:35:56,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:35:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 21:35:58,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:35:58,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290470467] [2022-04-06 21:35:58,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:35:58,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566578426] [2022-04-06 21:35:58,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566578426] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:35:58,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:35:58,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2022-04-06 21:35:58,635 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:35:58,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1165737733] [2022-04-06 21:35:58,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1165737733] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:35:58,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:35:58,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 21:35:58,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342308676] [2022-04-06 21:35:58,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:35:58,636 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 21:35:58,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:35:58,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 21:35:58,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:35:58,637 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:36:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:36:01,607 INFO L93 Difference]: Finished difference Result 156 states and 172 transitions. [2022-04-06 21:36:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:36:01,608 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2022-04-06 21:36:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:36:01,609 INFO L225 Difference]: With dead ends: 156 [2022-04-06 21:36:01,609 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 21:36:01,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:36:01,610 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:36:01,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 234 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 21:36:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 21:36:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2022-04-06 21:36:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 109 states have (on average 1.1192660550458715) internal successors, (122), 111 states have internal predecessors, (122), 16 states have call successors, (16), 15 states have call predecessors, (16), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 21:36:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2022-04-06 21:36:01,649 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 52 [2022-04-06 21:36:01,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:36:01,649 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2022-04-06 21:36:01,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:36:01,649 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2022-04-06 21:36:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 21:36:01,650 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:36:01,650 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:36:01,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 21:36:01,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:36:01,863 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:36:01,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:36:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1831066978, now seen corresponding path program 15 times [2022-04-06 21:36:01,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:36:01,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [596522608] [2022-04-06 21:36:01,867 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:36:01,867 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:36:01,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1831066978, now seen corresponding path program 16 times [2022-04-06 21:36:01,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:36:01,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460747886] [2022-04-06 21:36:01,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:36:01,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:36:01,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:36:01,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580343946] [2022-04-06 21:36:01,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:36:01,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:36:01,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:36:01,874 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:36:01,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 21:36:01,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:36:01,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:36:01,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 21:36:01,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:36:03,670 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:36:03,673 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:36:06,803 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:36:06,805 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:36:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 14 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 21:36:17,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:36:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 21:36:20,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:36:20,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460747886] [2022-04-06 21:36:20,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:36:20,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580343946] [2022-04-06 21:36:20,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580343946] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:36:20,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:36:20,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 29 [2022-04-06 21:36:20,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:36:20,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [596522608] [2022-04-06 21:36:20,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [596522608] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:36:20,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:36:20,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 21:36:20,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755897561] [2022-04-06 21:36:20,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:36:20,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 21:36:20,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:36:20,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 21:36:20,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:36:20,526 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:36:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:36:28,907 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2022-04-06 21:36:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:36:28,909 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2022-04-06 21:36:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:36:28,910 INFO L225 Difference]: With dead ends: 154 [2022-04-06 21:36:28,910 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 21:36:28,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 21:36:28,911 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:36:28,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 312 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-04-06 21:36:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 21:36:28,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2022-04-06 21:36:28,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 112 states have (on average 1.125) internal successors, (126), 114 states have internal predecessors, (126), 16 states have call successors, (16), 15 states have call predecessors, (16), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 21:36:28,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2022-04-06 21:36:28,940 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 52 [2022-04-06 21:36:28,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:36:28,940 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2022-04-06 21:36:28,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:36:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2022-04-06 21:36:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 21:36:28,941 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:36:28,941 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:36:28,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 21:36:29,149 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:36:29,149 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:36:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:36:29,150 INFO L85 PathProgramCache]: Analyzing trace with hash -169882076, now seen corresponding path program 17 times [2022-04-06 21:36:29,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:36:29,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1729384191] [2022-04-06 21:36:29,163 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:36:29,163 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:36:29,163 INFO L85 PathProgramCache]: Analyzing trace with hash -169882076, now seen corresponding path program 18 times [2022-04-06 21:36:29,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:36:29,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127589218] [2022-04-06 21:36:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:36:29,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:36:29,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:36:29,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793010036] [2022-04-06 21:36:29,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:36:29,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:36:29,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:36:29,178 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:36:29,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 21:36:29,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:36:29,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:36:29,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 21:36:29,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:36:29,606 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:36:29,608 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:36:29,612 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:36:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 21:36:31,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:36:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 21:36:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:36:31,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127589218] [2022-04-06 21:36:31,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:36:31,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793010036] [2022-04-06 21:36:31,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793010036] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:36:31,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:36:31,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2022-04-06 21:36:31,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:36:31,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1729384191] [2022-04-06 21:36:31,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1729384191] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:36:31,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:36:31,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:36:31,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447410578] [2022-04-06 21:36:31,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:36:31,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:36:31,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:36:31,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:36:31,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:36:31,978 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:37:06,704 WARN L232 SmtUtils]: Spent 34.59s on a formula simplification. DAG size of input: 69 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 21:37:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:37:07,144 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2022-04-06 21:37:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:37:07,144 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-04-06 21:37:07,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:37:07,145 INFO L225 Difference]: With dead ends: 149 [2022-04-06 21:37:07,145 INFO L226 Difference]: Without dead ends: 145 [2022-04-06 21:37:07,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:37:07,146 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:37:07,146 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 74 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 18 Unchecked, 0.3s Time] [2022-04-06 21:37:07,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-06 21:37:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 124. [2022-04-06 21:37:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 97 states have (on average 1.1030927835051547) internal successors, (107), 97 states have internal predecessors, (107), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:37:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2022-04-06 21:37:07,176 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 52 [2022-04-06 21:37:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:37:07,177 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2022-04-06 21:37:07,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:37:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2022-04-06 21:37:07,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 21:37:07,177 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:37:07,177 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:37:07,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 21:37:07,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 21:37:07,391 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:37:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:37:07,392 INFO L85 PathProgramCache]: Analyzing trace with hash 92500749, now seen corresponding path program 5 times [2022-04-06 21:37:07,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:07,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1308586521] [2022-04-06 21:37:07,394 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:37:07,394 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:37:07,394 INFO L85 PathProgramCache]: Analyzing trace with hash 92500749, now seen corresponding path program 6 times [2022-04-06 21:37:07,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:37:07,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307560762] [2022-04-06 21:37:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:37:07,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:37:07,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:37:07,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293205068] [2022-04-06 21:37:07,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:37:07,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:07,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:37:07,401 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:37:07,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 21:37:07,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:37:07,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:37:07,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 21:37:07,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:37:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:37:08,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:37:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 21:37:08,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:37:08,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307560762] [2022-04-06 21:37:08,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:37:08,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293205068] [2022-04-06 21:37:08,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293205068] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:37:08,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:37:08,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 21:37:08,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:37:08,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1308586521] [2022-04-06 21:37:08,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1308586521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:37:08,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:37:08,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:37:08,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725953914] [2022-04-06 21:37:08,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:37:08,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:37:08,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:37:08,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:37:08,760 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:37:09,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:37:09,107 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2022-04-06 21:37:09,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:37:09,108 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 53 [2022-04-06 21:37:09,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:37:09,109 INFO L225 Difference]: With dead ends: 153 [2022-04-06 21:37:09,109 INFO L226 Difference]: Without dead ends: 147 [2022-04-06 21:37:09,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:37:09,109 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:37:09,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 97 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:37:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-06 21:37:09,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2022-04-06 21:37:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 113 states have internal predecessors, (124), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 21:37:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2022-04-06 21:37:09,154 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 53 [2022-04-06 21:37:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:37:09,154 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2022-04-06 21:37:09,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:37:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2022-04-06 21:37:09,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:37:09,155 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:37:09,155 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:37:09,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 21:37:09,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 21:37:09,375 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:37:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:37:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1555087693, now seen corresponding path program 7 times [2022-04-06 21:37:09,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:09,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [900754651] [2022-04-06 21:37:09,379 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:37:09,379 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:37:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1555087693, now seen corresponding path program 8 times [2022-04-06 21:37:09,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:37:09,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790983795] [2022-04-06 21:37:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:37:09,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:37:09,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:37:09,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669949119] [2022-04-06 21:37:09,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:37:09,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:09,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:37:09,387 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:37:09,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 21:37:09,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:37:09,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:37:09,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 21:37:09,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:37:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:37:10,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:37:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 21:37:11,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:37:11,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790983795] [2022-04-06 21:37:11,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:37:11,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669949119] [2022-04-06 21:37:11,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669949119] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:37:11,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:37:11,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-04-06 21:37:11,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:37:11,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [900754651] [2022-04-06 21:37:11,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [900754651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:37:11,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:37:11,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:37:11,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672128960] [2022-04-06 21:37:11,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:37:11,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:37:11,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:11,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:37:11,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:37:11,051 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 21:37:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:37:11,507 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2022-04-06 21:37:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 21:37:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 63 [2022-04-06 21:37:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:37:11,508 INFO L225 Difference]: With dead ends: 173 [2022-04-06 21:37:11,508 INFO L226 Difference]: Without dead ends: 167 [2022-04-06 21:37:11,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:37:11,509 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:37:11,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 106 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:37:11,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-06 21:37:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2022-04-06 21:37:11,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 129 states have (on average 1.1007751937984496) internal successors, (142), 129 states have internal predecessors, (142), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 21:37:11,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 176 transitions. [2022-04-06 21:37:11,570 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 176 transitions. Word has length 63 [2022-04-06 21:37:11,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:37:11,570 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 176 transitions. [2022-04-06 21:37:11,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 21:37:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 176 transitions. [2022-04-06 21:37:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 21:37:11,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:37:11,571 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:37:11,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 21:37:11,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 21:37:11,787 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:37:11,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:37:11,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1195458445, now seen corresponding path program 9 times [2022-04-06 21:37:11,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:11,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1617472408] [2022-04-06 21:37:11,790 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:37:11,790 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:37:11,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1195458445, now seen corresponding path program 10 times [2022-04-06 21:37:11,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:37:11,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361609631] [2022-04-06 21:37:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:37:11,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:37:11,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:37:11,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151792222] [2022-04-06 21:37:11,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:37:11,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:11,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:37:11,797 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:37:11,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 21:37:11,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:37:11,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:37:11,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 21:37:11,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:37:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 12 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:37:12,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:37:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 12 proven. 102 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 21:37:13,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:37:13,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361609631] [2022-04-06 21:37:13,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:37:13,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151792222] [2022-04-06 21:37:13,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151792222] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:37:13,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:37:13,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-06 21:37:13,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:37:13,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1617472408] [2022-04-06 21:37:13,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1617472408] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:37:13,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:37:13,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:37:13,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432009445] [2022-04-06 21:37:13,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:37:13,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:37:13,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:13,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:37:13,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:37:13,735 INFO L87 Difference]: Start difference. First operand 164 states and 176 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 21:37:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:37:14,258 INFO L93 Difference]: Finished difference Result 193 states and 207 transitions. [2022-04-06 21:37:14,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:37:14,258 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 73 [2022-04-06 21:37:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:37:14,259 INFO L225 Difference]: With dead ends: 193 [2022-04-06 21:37:14,259 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 21:37:14,260 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:37:14,260 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:37:14,260 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 122 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:37:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 21:37:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-04-06 21:37:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 145 states have (on average 1.103448275862069) internal successors, (160), 145 states have internal predecessors, (160), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 21:37:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 198 transitions. [2022-04-06 21:37:14,335 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 198 transitions. Word has length 73 [2022-04-06 21:37:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:37:14,341 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 198 transitions. [2022-04-06 21:37:14,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 21:37:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 198 transitions. [2022-04-06 21:37:14,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 21:37:14,342 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:37:14,342 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:37:14,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 21:37:14,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 21:37:14,555 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:37:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:37:14,556 INFO L85 PathProgramCache]: Analyzing trace with hash 116977101, now seen corresponding path program 11 times [2022-04-06 21:37:14,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:14,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1713240920] [2022-04-06 21:37:14,558 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:37:14,558 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:37:14,558 INFO L85 PathProgramCache]: Analyzing trace with hash 116977101, now seen corresponding path program 12 times [2022-04-06 21:37:14,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:37:14,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105343664] [2022-04-06 21:37:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:37:14,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:37:14,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:37:14,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809081261] [2022-04-06 21:37:14,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:37:14,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:14,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:37:14,566 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:37:14,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 21:37:14,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 21:37:14,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:37:14,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 21:37:14,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:37:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 14 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:37:15,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:37:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 14 proven. 140 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 21:37:16,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:37:16,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105343664] [2022-04-06 21:37:16,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:37:16,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809081261] [2022-04-06 21:37:16,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809081261] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:37:16,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:37:16,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-04-06 21:37:16,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:37:16,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1713240920] [2022-04-06 21:37:16,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1713240920] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:37:16,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:37:16,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:37:16,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022763942] [2022-04-06 21:37:16,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:37:16,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:37:16,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:16,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:37:16,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:37:16,872 INFO L87 Difference]: Start difference. First operand 184 states and 198 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:37:17,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:37:17,489 INFO L93 Difference]: Finished difference Result 213 states and 229 transitions. [2022-04-06 21:37:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:37:17,489 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 83 [2022-04-06 21:37:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:37:17,491 INFO L225 Difference]: With dead ends: 213 [2022-04-06 21:37:17,491 INFO L226 Difference]: Without dead ends: 207 [2022-04-06 21:37:17,491 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:37:17,492 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:37:17,492 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 124 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:37:17,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-04-06 21:37:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2022-04-06 21:37:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 161 states have (on average 1.1055900621118013) internal successors, (178), 161 states have internal predecessors, (178), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 21:37:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 220 transitions. [2022-04-06 21:37:17,558 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 220 transitions. Word has length 83 [2022-04-06 21:37:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:37:17,558 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 220 transitions. [2022-04-06 21:37:17,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:37:17,558 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 220 transitions. [2022-04-06 21:37:17,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 21:37:17,559 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:37:17,559 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:37:17,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 21:37:17,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 21:37:17,760 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:37:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:37:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2023476237, now seen corresponding path program 13 times [2022-04-06 21:37:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:17,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1324520088] [2022-04-06 21:37:17,763 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:37:17,763 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:37:17,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2023476237, now seen corresponding path program 14 times [2022-04-06 21:37:17,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:37:17,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620715140] [2022-04-06 21:37:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:37:17,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:37:17,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:37:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733445401] [2022-04-06 21:37:17,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:37:17,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:17,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:37:17,770 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:37:17,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 21:37:17,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:37:17,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:37:17,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 21:37:17,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:37:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 16 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:37:19,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:37:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 16 proven. 184 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 21:37:20,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:37:20,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620715140] [2022-04-06 21:37:20,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:37:20,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733445401] [2022-04-06 21:37:20,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733445401] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:37:20,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:37:20,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-04-06 21:37:20,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:37:20,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1324520088] [2022-04-06 21:37:20,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1324520088] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:37:20,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:37:20,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:37:20,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933467390] [2022-04-06 21:37:20,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:37:20,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:37:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:37:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:37:20,446 INFO L87 Difference]: Start difference. First operand 204 states and 220 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 21:37:21,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:37:21,187 INFO L93 Difference]: Finished difference Result 233 states and 251 transitions. [2022-04-06 21:37:21,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 21:37:21,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 93 [2022-04-06 21:37:21,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:37:21,188 INFO L225 Difference]: With dead ends: 233 [2022-04-06 21:37:21,189 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 21:37:21,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:37:21,190 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:37:21,190 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 140 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:37:21,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 21:37:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-04-06 21:37:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 177 states have (on average 1.1073446327683616) internal successors, (196), 177 states have internal predecessors, (196), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 21:37:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 242 transitions. [2022-04-06 21:37:21,278 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 242 transitions. Word has length 93 [2022-04-06 21:37:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:37:21,278 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 242 transitions. [2022-04-06 21:37:21,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 21:37:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 242 transitions. [2022-04-06 21:37:21,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 21:37:21,280 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:37:21,280 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:37:21,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 21:37:21,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:21,499 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:37:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:37:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1408096845, now seen corresponding path program 15 times [2022-04-06 21:37:21,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:21,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233863686] [2022-04-06 21:37:21,503 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:37:21,503 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:37:21,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1408096845, now seen corresponding path program 16 times [2022-04-06 21:37:21,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:37:21,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896715288] [2022-04-06 21:37:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:37:21,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:37:21,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:37:21,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449757742] [2022-04-06 21:37:21,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:37:21,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:21,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:37:21,513 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:37:21,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 21:37:21,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:37:21,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:37:21,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 21:37:21,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:37:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 18 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:37:22,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:37:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 18 proven. 234 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 21:37:24,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:37:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896715288] [2022-04-06 21:37:24,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:37:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449757742] [2022-04-06 21:37:24,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449757742] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:37:24,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:37:24,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-04-06 21:37:24,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:37:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [233863686] [2022-04-06 21:37:24,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [233863686] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:37:24,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:37:24,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:37:24,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827938964] [2022-04-06 21:37:24,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:37:24,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:37:24,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:24,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:37:24,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:37:24,643 INFO L87 Difference]: Start difference. First operand 224 states and 242 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 21:37:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:37:25,546 INFO L93 Difference]: Finished difference Result 253 states and 273 transitions. [2022-04-06 21:37:25,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:37:25,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 103 [2022-04-06 21:37:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:37:25,547 INFO L225 Difference]: With dead ends: 253 [2022-04-06 21:37:25,547 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 21:37:25,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:37:25,548 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:37:25,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 135 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:37:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 21:37:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 244. [2022-04-06 21:37:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 193 states have (on average 1.1088082901554404) internal successors, (214), 193 states have internal predecessors, (214), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:37:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2022-04-06 21:37:25,624 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 103 [2022-04-06 21:37:25,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:37:25,625 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2022-04-06 21:37:25,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 21:37:25,625 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2022-04-06 21:37:25,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 21:37:25,626 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:37:25,626 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:37:25,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 21:37:25,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-06 21:37:25,843 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:37:25,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:37:25,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1806899341, now seen corresponding path program 17 times [2022-04-06 21:37:25,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:25,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1674909788] [2022-04-06 21:37:25,847 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:37:25,847 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:37:25,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1806899341, now seen corresponding path program 18 times [2022-04-06 21:37:25,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:37:25,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845577645] [2022-04-06 21:37:25,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:37:25,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:37:25,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:37:25,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220421942] [2022-04-06 21:37:25,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:37:25,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:25,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:37:25,856 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:37:25,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 21:37:25,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 21:37:25,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:37:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 21:37:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:37:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:37:27,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:37:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 290 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 21:37:29,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:37:29,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845577645] [2022-04-06 21:37:29,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:37:29,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220421942] [2022-04-06 21:37:29,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220421942] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:37:29,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:37:29,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-04-06 21:37:29,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:37:29,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1674909788] [2022-04-06 21:37:29,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1674909788] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:37:29,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:37:29,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:37:29,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736955761] [2022-04-06 21:37:29,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:37:29,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:37:29,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:29,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:37:29,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:37:29,324 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 13 states have internal predecessors, (89), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 21:37:30,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:37:30,251 INFO L93 Difference]: Finished difference Result 273 states and 295 transitions. [2022-04-06 21:37:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 21:37:30,255 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 13 states have internal predecessors, (89), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 113 [2022-04-06 21:37:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:37:30,257 INFO L225 Difference]: With dead ends: 273 [2022-04-06 21:37:30,257 INFO L226 Difference]: Without dead ends: 267 [2022-04-06 21:37:30,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 21:37:30,258 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:37:30,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 158 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:37:30,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-04-06 21:37:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2022-04-06 21:37:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 209 states have (on average 1.1100478468899522) internal successors, (232), 209 states have internal predecessors, (232), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 21:37:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 286 transitions. [2022-04-06 21:37:30,337 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 286 transitions. Word has length 113 [2022-04-06 21:37:30,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:37:30,337 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 286 transitions. [2022-04-06 21:37:30,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 13 states have internal predecessors, (89), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 21:37:30,337 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 286 transitions. [2022-04-06 21:37:30,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 21:37:30,338 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:37:30,338 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:37:30,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 21:37:30,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:30,541 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:37:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:37:30,541 INFO L85 PathProgramCache]: Analyzing trace with hash -307263795, now seen corresponding path program 19 times [2022-04-06 21:37:30,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:30,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [837503291] [2022-04-06 21:37:30,544 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:37:30,545 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:37:30,545 INFO L85 PathProgramCache]: Analyzing trace with hash -307263795, now seen corresponding path program 20 times [2022-04-06 21:37:30,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:37:30,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856174841] [2022-04-06 21:37:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:37:30,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:37:30,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:37:30,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822137079] [2022-04-06 21:37:30,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:37:30,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:30,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:37:30,552 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:37:30,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 21:37:30,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:37:30,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:37:30,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 21:37:30,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:37:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 22 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:37:32,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:37:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 22 proven. 352 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 21:37:34,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:37:34,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856174841] [2022-04-06 21:37:34,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:37:34,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822137079] [2022-04-06 21:37:34,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822137079] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:37:34,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:37:34,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-04-06 21:37:34,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:37:34,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [837503291] [2022-04-06 21:37:34,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [837503291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:37:34,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:37:34,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 21:37:34,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942766715] [2022-04-06 21:37:34,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:37:34,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 21:37:34,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:34,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 21:37:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:37:34,300 INFO L87 Difference]: Start difference. First operand 264 states and 286 transitions. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 14 states have internal predecessors, (97), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:37:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:37:35,368 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2022-04-06 21:37:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 21:37:35,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 14 states have internal predecessors, (97), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 123 [2022-04-06 21:37:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:37:35,370 INFO L225 Difference]: With dead ends: 293 [2022-04-06 21:37:35,370 INFO L226 Difference]: Without dead ends: 287 [2022-04-06 21:37:35,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 21:37:35,371 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:37:35,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 181 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:37:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-06 21:37:35,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2022-04-06 21:37:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 225 states have (on average 1.1111111111111112) internal successors, (250), 225 states have internal predecessors, (250), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 21:37:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 308 transitions. [2022-04-06 21:37:35,477 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 308 transitions. Word has length 123 [2022-04-06 21:37:35,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:37:35,477 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 308 transitions. [2022-04-06 21:37:35,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 14 states have internal predecessors, (97), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:37:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 308 transitions. [2022-04-06 21:37:35,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 21:37:35,478 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:37:35,478 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:37:35,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 21:37:35,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:35,680 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:37:35,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:37:35,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1566104307, now seen corresponding path program 21 times [2022-04-06 21:37:35,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:35,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2072452796] [2022-04-06 21:37:35,683 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:37:35,683 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:37:35,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1566104307, now seen corresponding path program 22 times [2022-04-06 21:37:35,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:37:35,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010625623] [2022-04-06 21:37:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:37:35,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:37:35,689 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:37:35,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037305678] [2022-04-06 21:37:35,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:37:35,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:35,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:37:35,691 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:37:35,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 21:37:35,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:37:35,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:37:35,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 21:37:35,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:37:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 24 proven. 684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:37:37,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:37:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 24 proven. 420 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 21:37:39,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:37:39,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010625623] [2022-04-06 21:37:39,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:37:39,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037305678] [2022-04-06 21:37:39,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037305678] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:37:39,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:37:39,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-04-06 21:37:39,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:37:39,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2072452796] [2022-04-06 21:37:39,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2072452796] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:37:39,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:37:39,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:37:39,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694674544] [2022-04-06 21:37:39,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:37:39,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:37:39,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:39,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:37:39,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:37:39,936 INFO L87 Difference]: Start difference. First operand 284 states and 308 transitions. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 15 states have internal predecessors, (105), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 21:37:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:37:41,117 INFO L93 Difference]: Finished difference Result 313 states and 339 transitions. [2022-04-06 21:37:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 21:37:41,118 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 15 states have internal predecessors, (105), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 133 [2022-04-06 21:37:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:37:41,119 INFO L225 Difference]: With dead ends: 313 [2022-04-06 21:37:41,119 INFO L226 Difference]: Without dead ends: 307 [2022-04-06 21:37:41,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 21:37:41,121 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:37:41,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 183 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:37:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-04-06 21:37:41,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 304. [2022-04-06 21:37:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 241 states have (on average 1.112033195020747) internal successors, (268), 241 states have internal predecessors, (268), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:37:41,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 330 transitions. [2022-04-06 21:37:41,224 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 330 transitions. Word has length 133 [2022-04-06 21:37:41,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:37:41,224 INFO L478 AbstractCegarLoop]: Abstraction has 304 states and 330 transitions. [2022-04-06 21:37:41,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 15 states have internal predecessors, (105), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 21:37:41,224 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 330 transitions. [2022-04-06 21:37:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 21:37:41,225 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:37:41,225 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:37:41,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 21:37:41,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-04-06 21:37:41,425 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:37:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:37:41,426 INFO L85 PathProgramCache]: Analyzing trace with hash 777909069, now seen corresponding path program 23 times [2022-04-06 21:37:41,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:41,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1219303240] [2022-04-06 21:37:41,428 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:37:41,428 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:37:41,429 INFO L85 PathProgramCache]: Analyzing trace with hash 777909069, now seen corresponding path program 24 times [2022-04-06 21:37:41,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:37:41,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985188028] [2022-04-06 21:37:41,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:37:41,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:37:41,435 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:37:41,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255139492] [2022-04-06 21:37:41,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:37:41,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:41,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:37:41,436 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:37:41,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 21:37:41,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-04-06 21:37:41,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:37:41,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 21:37:41,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:37:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 26 proven. 806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:37:43,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:37:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 26 proven. 494 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 21:37:46,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:37:46,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985188028] [2022-04-06 21:37:46,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:37:46,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255139492] [2022-04-06 21:37:46,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255139492] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:37:46,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:37:46,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-04-06 21:37:46,131 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:37:46,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1219303240] [2022-04-06 21:37:46,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1219303240] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:37:46,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:37:46,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:37:46,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24183528] [2022-04-06 21:37:46,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:37:46,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:37:46,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:46,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:37:46,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-04-06 21:37:46,133 INFO L87 Difference]: Start difference. First operand 304 states and 330 transitions. Second operand has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 16 states have internal predecessors, (113), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 21:37:47,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:37:47,495 INFO L93 Difference]: Finished difference Result 333 states and 361 transitions. [2022-04-06 21:37:47,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 21:37:47,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 16 states have internal predecessors, (113), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 143 [2022-04-06 21:37:47,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:37:47,496 INFO L225 Difference]: With dead ends: 333 [2022-04-06 21:37:47,496 INFO L226 Difference]: Without dead ends: 327 [2022-04-06 21:37:47,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:37:47,497 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:37:47,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 199 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:37:47,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-04-06 21:37:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 324. [2022-04-06 21:37:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 257 states have (on average 1.11284046692607) internal successors, (286), 257 states have internal predecessors, (286), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 21:37:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 352 transitions. [2022-04-06 21:37:47,633 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 352 transitions. Word has length 143 [2022-04-06 21:37:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:37:47,633 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 352 transitions. [2022-04-06 21:37:47,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 16 states have internal predecessors, (113), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 21:37:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 352 transitions. [2022-04-06 21:37:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 21:37:47,634 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:37:47,635 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:37:47,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 21:37:47,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 21:37:47,841 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:37:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:37:47,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1335357837, now seen corresponding path program 25 times [2022-04-06 21:37:47,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:47,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1278477037] [2022-04-06 21:37:47,846 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:37:47,846 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:37:47,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1335357837, now seen corresponding path program 26 times [2022-04-06 21:37:47,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:37:47,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974921762] [2022-04-06 21:37:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:37:47,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:37:47,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:37:47,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002516009] [2022-04-06 21:37:47,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:37:47,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:47,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:37:47,855 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:37:47,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 21:37:47,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:37:47,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:37:47,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 21:37:47,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:37:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 28 proven. 938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:37:50,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:37:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 28 proven. 574 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 21:37:52,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:37:52,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974921762] [2022-04-06 21:37:52,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:37:52,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002516009] [2022-04-06 21:37:52,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002516009] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:37:52,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:37:52,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-04-06 21:37:52,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:37:52,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1278477037] [2022-04-06 21:37:52,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1278477037] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:37:52,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:37:52,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 21:37:52,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204327768] [2022-04-06 21:37:52,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:37:52,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 21:37:52,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:52,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 21:37:52,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:37:52,924 INFO L87 Difference]: Start difference. First operand 324 states and 352 transitions. Second operand has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 17 states have internal predecessors, (121), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 21:37:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:37:54,361 INFO L93 Difference]: Finished difference Result 353 states and 383 transitions. [2022-04-06 21:37:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 21:37:54,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 17 states have internal predecessors, (121), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 153 [2022-04-06 21:37:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:37:54,362 INFO L225 Difference]: With dead ends: 353 [2022-04-06 21:37:54,362 INFO L226 Difference]: Without dead ends: 347 [2022-04-06 21:37:54,363 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 21:37:54,363 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 60 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:37:54,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 208 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:37:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-04-06 21:37:54,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 344. [2022-04-06 21:37:54,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 273 states have (on average 1.1135531135531136) internal successors, (304), 273 states have internal predecessors, (304), 36 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 21:37:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 374 transitions. [2022-04-06 21:37:54,473 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 374 transitions. Word has length 153 [2022-04-06 21:37:54,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:37:54,473 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 374 transitions. [2022-04-06 21:37:54,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 17 states have internal predecessors, (121), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 21:37:54,474 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 374 transitions. [2022-04-06 21:37:54,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 21:37:54,475 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:37:54,475 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:37:54,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 21:37:54,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 21:37:54,683 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:37:54,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:37:54,684 INFO L85 PathProgramCache]: Analyzing trace with hash 538517453, now seen corresponding path program 27 times [2022-04-06 21:37:54,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:37:54,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [923465185] [2022-04-06 21:37:54,687 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:37:54,687 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:37:54,687 INFO L85 PathProgramCache]: Analyzing trace with hash 538517453, now seen corresponding path program 28 times [2022-04-06 21:37:54,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:37:54,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536336030] [2022-04-06 21:37:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:37:54,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:37:54,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:37:54,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584914014] [2022-04-06 21:37:54,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:37:54,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:37:54,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:37:54,697 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:37:54,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 21:37:54,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:37:54,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:37:54,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 21:37:54,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:37:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 30 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:37:57,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:38:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 30 proven. 660 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 21:38:00,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:38:00,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536336030] [2022-04-06 21:38:00,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:38:00,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584914014] [2022-04-06 21:38:00,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584914014] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:38:00,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:38:00,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-04-06 21:38:00,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:38:00,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [923465185] [2022-04-06 21:38:00,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [923465185] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:38:00,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:38:00,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:38:00,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305964664] [2022-04-06 21:38:00,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:38:00,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:38:00,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:38:00,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:38:00,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 21:38:00,210 INFO L87 Difference]: Start difference. First operand 344 states and 374 transitions. Second operand has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 21:38:01,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:38:01,797 INFO L93 Difference]: Finished difference Result 373 states and 405 transitions. [2022-04-06 21:38:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 21:38:01,797 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 163 [2022-04-06 21:38:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:38:01,798 INFO L225 Difference]: With dead ends: 373 [2022-04-06 21:38:01,799 INFO L226 Difference]: Without dead ends: 367 [2022-04-06 21:38:01,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 21:38:01,800 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 69 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:38:01,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 196 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:38:01,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-04-06 21:38:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 364. [2022-04-06 21:38:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 289 states have (on average 1.1141868512110726) internal successors, (322), 289 states have internal predecessors, (322), 38 states have call successors, (38), 38 states have call predecessors, (38), 36 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 21:38:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 396 transitions. [2022-04-06 21:38:01,917 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 396 transitions. Word has length 163 [2022-04-06 21:38:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:38:01,917 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 396 transitions. [2022-04-06 21:38:01,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 21:38:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 396 transitions. [2022-04-06 21:38:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 21:38:01,918 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:38:01,918 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:38:01,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 21:38:02,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:38:02,119 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:38:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:38:02,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1420131853, now seen corresponding path program 29 times [2022-04-06 21:38:02,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:38:02,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1754419746] [2022-04-06 21:38:02,122 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:38:02,122 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:38:02,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1420131853, now seen corresponding path program 30 times [2022-04-06 21:38:02,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:38:02,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012457996] [2022-04-06 21:38:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:38:02,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:38:02,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:38:02,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172092116] [2022-04-06 21:38:02,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:38:02,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:38:02,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:38:02,131 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:38:02,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 21:38:02,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-04-06 21:38:02,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:38:02,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 21:38:02,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:38:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 32 proven. 1232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:38:04,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:38:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 32 proven. 752 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 21:38:08,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:38:08,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012457996] [2022-04-06 21:38:08,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:38:08,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172092116] [2022-04-06 21:38:08,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172092116] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:38:08,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:38:08,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-04-06 21:38:08,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:38:08,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1754419746] [2022-04-06 21:38:08,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1754419746] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:38:08,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:38:08,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 21:38:08,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119072567] [2022-04-06 21:38:08,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:38:08,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 21:38:08,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:38:08,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 21:38:08,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 21:38:08,205 INFO L87 Difference]: Start difference. First operand 364 states and 396 transitions. Second operand has 20 states, 20 states have (on average 6.85) internal successors, (137), 19 states have internal predecessors, (137), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 21:38:10,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:38:10,012 INFO L93 Difference]: Finished difference Result 393 states and 427 transitions. [2022-04-06 21:38:10,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 21:38:10,013 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.85) internal successors, (137), 19 states have internal predecessors, (137), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 173 [2022-04-06 21:38:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:38:10,027 INFO L225 Difference]: With dead ends: 393 [2022-04-06 21:38:10,028 INFO L226 Difference]: Without dead ends: 387 [2022-04-06 21:38:10,030 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 21:38:10,030 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:38:10,031 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 240 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:38:10,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-04-06 21:38:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 384. [2022-04-06 21:38:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 305 states have (on average 1.1147540983606556) internal successors, (340), 305 states have internal predecessors, (340), 40 states have call successors, (40), 40 states have call predecessors, (40), 38 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 21:38:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 418 transitions. [2022-04-06 21:38:10,182 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 418 transitions. Word has length 173 [2022-04-06 21:38:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:38:10,183 INFO L478 AbstractCegarLoop]: Abstraction has 384 states and 418 transitions. [2022-04-06 21:38:10,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.85) internal successors, (137), 19 states have internal predecessors, (137), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 21:38:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 418 transitions. [2022-04-06 21:38:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 21:38:10,184 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:38:10,184 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:38:10,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 21:38:10,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 21:38:10,399 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:38:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:38:10,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2097220685, now seen corresponding path program 31 times [2022-04-06 21:38:10,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:38:10,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [529121403] [2022-04-06 21:38:10,404 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:38:10,404 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:38:10,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2097220685, now seen corresponding path program 32 times [2022-04-06 21:38:10,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:38:10,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142886620] [2022-04-06 21:38:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:38:10,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:38:10,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:38:10,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794859452] [2022-04-06 21:38:10,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:38:10,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:38:10,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:38:10,416 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:38:10,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 21:38:10,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:38:10,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:38:10,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 21:38:10,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:38:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 34 proven. 1394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:38:13,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:38:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 34 proven. 850 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 21:38:17,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:38:17,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142886620] [2022-04-06 21:38:17,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:38:17,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794859452] [2022-04-06 21:38:17,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794859452] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:38:17,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:38:17,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-04-06 21:38:17,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:38:17,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [529121403] [2022-04-06 21:38:17,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [529121403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:38:17,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:38:17,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:38:17,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387304860] [2022-04-06 21:38:17,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:38:17,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:38:17,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:38:17,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:38:17,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 21:38:17,067 INFO L87 Difference]: Start difference. First operand 384 states and 418 transitions. Second operand has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 21:38:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:38:18,902 INFO L93 Difference]: Finished difference Result 413 states and 449 transitions. [2022-04-06 21:38:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 21:38:18,903 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 183 [2022-04-06 21:38:18,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:38:18,905 INFO L225 Difference]: With dead ends: 413 [2022-04-06 21:38:18,905 INFO L226 Difference]: Without dead ends: 407 [2022-04-06 21:38:18,905 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 21:38:18,906 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 64 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:38:18,906 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 214 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:38:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-04-06 21:38:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 404. [2022-04-06 21:38:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 321 states have (on average 1.115264797507788) internal successors, (358), 321 states have internal predecessors, (358), 42 states have call successors, (42), 42 states have call predecessors, (42), 40 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 21:38:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 440 transitions. [2022-04-06 21:38:19,075 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 440 transitions. Word has length 183 [2022-04-06 21:38:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:38:19,076 INFO L478 AbstractCegarLoop]: Abstraction has 404 states and 440 transitions. [2022-04-06 21:38:19,076 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 21:38:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 440 transitions. [2022-04-06 21:38:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 21:38:19,077 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:38:19,077 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:38:19,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 21:38:19,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 21:38:19,291 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:38:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:38:19,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1139788429, now seen corresponding path program 33 times [2022-04-06 21:38:19,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:38:19,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [860308241] [2022-04-06 21:38:19,295 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:38:19,295 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:38:19,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1139788429, now seen corresponding path program 34 times [2022-04-06 21:38:19,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:38:19,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355590240] [2022-04-06 21:38:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:38:19,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:38:19,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:38:19,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037610536] [2022-04-06 21:38:19,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:38:19,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:38:19,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:38:19,304 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:38:19,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 21:38:19,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:38:19,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:38:19,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 21:38:19,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:38:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 36 proven. 1566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:38:22,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:38:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 36 proven. 954 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 21:38:26,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:38:26,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355590240] [2022-04-06 21:38:26,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:38:26,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037610536] [2022-04-06 21:38:26,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037610536] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:38:26,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:38:26,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-04-06 21:38:26,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:38:26,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [860308241] [2022-04-06 21:38:26,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [860308241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:38:26,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:38:26,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 21:38:26,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585371139] [2022-04-06 21:38:26,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:38:26,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 21:38:26,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:38:26,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 21:38:26,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 21:38:26,428 INFO L87 Difference]: Start difference. First operand 404 states and 440 transitions. Second operand has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 21 states have internal predecessors, (153), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 21:38:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:38:28,375 INFO L93 Difference]: Finished difference Result 433 states and 471 transitions. [2022-04-06 21:38:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 21:38:28,375 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 21 states have internal predecessors, (153), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 193 [2022-04-06 21:38:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:38:28,376 INFO L225 Difference]: With dead ends: 433 [2022-04-06 21:38:28,377 INFO L226 Difference]: Without dead ends: 427 [2022-04-06 21:38:28,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 21:38:28,378 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 77 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:38:28,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 237 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:38:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-04-06 21:38:28,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 424. [2022-04-06 21:38:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 337 states have (on average 1.1157270029673592) internal successors, (376), 337 states have internal predecessors, (376), 44 states have call successors, (44), 44 states have call predecessors, (44), 42 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-06 21:38:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 462 transitions. [2022-04-06 21:38:28,520 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 462 transitions. Word has length 193 [2022-04-06 21:38:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:38:28,520 INFO L478 AbstractCegarLoop]: Abstraction has 424 states and 462 transitions. [2022-04-06 21:38:28,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 21 states have internal predecessors, (153), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 21:38:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 462 transitions. [2022-04-06 21:38:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 21:38:28,521 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:38:28,521 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:38:28,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 21:38:28,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 21:38:28,722 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:38:28,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:38:28,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1355433779, now seen corresponding path program 35 times [2022-04-06 21:38:28,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:38:28,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1033743814] [2022-04-06 21:38:28,726 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:38:28,727 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:38:28,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1355433779, now seen corresponding path program 36 times [2022-04-06 21:38:28,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:38:28,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003242401] [2022-04-06 21:38:28,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:38:28,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:38:28,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:38:28,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418775237] [2022-04-06 21:38:28,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:38:28,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:38:28,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:38:28,736 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:38:28,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 21:38:28,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-04-06 21:38:28,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:38:28,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 21:38:28,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:38:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 38 proven. 1748 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:38:31,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:38:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 38 proven. 1064 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-04-06 21:38:36,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:38:36,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003242401] [2022-04-06 21:38:36,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:38:36,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418775237] [2022-04-06 21:38:36,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418775237] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:38:36,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:38:36,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-04-06 21:38:36,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:38:36,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1033743814] [2022-04-06 21:38:36,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1033743814] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:38:36,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:38:36,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:38:36,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339463837] [2022-04-06 21:38:36,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:38:36,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:38:36,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:38:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:38:36,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 21:38:36,576 INFO L87 Difference]: Start difference. First operand 424 states and 462 transitions. Second operand has 23 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 21:38:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:38:38,689 INFO L93 Difference]: Finished difference Result 453 states and 493 transitions. [2022-04-06 21:38:38,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 21:38:38,689 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 203 [2022-04-06 21:38:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:38:38,691 INFO L225 Difference]: With dead ends: 453 [2022-04-06 21:38:38,691 INFO L226 Difference]: Without dead ends: 447 [2022-04-06 21:38:38,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 21:38:38,692 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 104 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:38:38,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 253 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:38:38,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-04-06 21:38:38,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 444. [2022-04-06 21:38:38,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 353 states have (on average 1.1161473087818696) internal successors, (394), 353 states have internal predecessors, (394), 46 states have call successors, (46), 46 states have call predecessors, (46), 44 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 21:38:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 484 transitions. [2022-04-06 21:38:38,877 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 484 transitions. Word has length 203 [2022-04-06 21:38:38,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:38:38,877 INFO L478 AbstractCegarLoop]: Abstraction has 444 states and 484 transitions. [2022-04-06 21:38:38,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 21:38:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 484 transitions. [2022-04-06 21:38:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 21:38:38,879 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:38:38,879 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:38:38,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 21:38:39,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-04-06 21:38:39,099 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:38:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:38:39,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1603720973, now seen corresponding path program 37 times [2022-04-06 21:38:39,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:38:39,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1999686500] [2022-04-06 21:38:39,104 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:38:39,104 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:38:39,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1603720973, now seen corresponding path program 38 times [2022-04-06 21:38:39,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:38:39,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245765945] [2022-04-06 21:38:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:38:39,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:38:39,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:38:39,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346754866] [2022-04-06 21:38:39,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:38:39,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:38:39,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:38:39,114 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:38:39,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 21:38:39,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:38:39,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:38:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 21:38:39,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:38:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 40 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:38:42,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:38:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 40 proven. 1180 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 21:38:47,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:38:47,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245765945] [2022-04-06 21:38:47,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:38:47,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346754866] [2022-04-06 21:38:47,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346754866] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:38:47,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:38:47,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-04-06 21:38:47,068 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:38:47,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1999686500] [2022-04-06 21:38:47,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1999686500] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:38:47,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:38:47,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 21:38:47,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052669322] [2022-04-06 21:38:47,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:38:47,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 21:38:47,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:38:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 21:38:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 21:38:47,070 INFO L87 Difference]: Start difference. First operand 444 states and 484 transitions. Second operand has 24 states, 24 states have (on average 7.041666666666667) internal successors, (169), 23 states have internal predecessors, (169), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 21:38:49,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:38:49,312 INFO L93 Difference]: Finished difference Result 473 states and 515 transitions. [2022-04-06 21:38:49,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 21:38:49,313 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.041666666666667) internal successors, (169), 23 states have internal predecessors, (169), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 213 [2022-04-06 21:38:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:38:49,314 INFO L225 Difference]: With dead ends: 473 [2022-04-06 21:38:49,314 INFO L226 Difference]: Without dead ends: 467 [2022-04-06 21:38:49,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 21:38:49,315 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 74 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:38:49,315 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 248 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:38:49,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-04-06 21:38:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 464. [2022-04-06 21:38:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 369 states have (on average 1.1165311653116532) internal successors, (412), 369 states have internal predecessors, (412), 48 states have call successors, (48), 48 states have call predecessors, (48), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-06 21:38:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 506 transitions. [2022-04-06 21:38:49,479 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 506 transitions. Word has length 213 [2022-04-06 21:38:49,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:38:49,479 INFO L478 AbstractCegarLoop]: Abstraction has 464 states and 506 transitions. [2022-04-06 21:38:49,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.041666666666667) internal successors, (169), 23 states have internal predecessors, (169), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 21:38:49,479 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 506 transitions. [2022-04-06 21:38:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-04-06 21:38:49,481 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:38:49,481 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:38:49,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 21:38:49,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:38:49,695 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:38:49,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:38:49,696 INFO L85 PathProgramCache]: Analyzing trace with hash -791206579, now seen corresponding path program 39 times [2022-04-06 21:38:49,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:38:49,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [690282049] [2022-04-06 21:38:49,699 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:38:49,699 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:38:49,699 INFO L85 PathProgramCache]: Analyzing trace with hash -791206579, now seen corresponding path program 40 times [2022-04-06 21:38:49,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:38:49,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185769419] [2022-04-06 21:38:49,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:38:49,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:38:49,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:38:49,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574458617] [2022-04-06 21:38:49,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:38:49,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:38:49,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:38:49,719 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:38:49,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 21:38:49,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:38:49,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:38:49,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 21:38:49,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:38:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2184 backedges. 42 proven. 2142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:38:53,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:38:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2184 backedges. 42 proven. 1302 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 21:38:58,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:38:58,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185769419] [2022-04-06 21:38:58,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:38:58,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574458617] [2022-04-06 21:38:58,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574458617] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:38:58,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:38:58,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-04-06 21:38:58,282 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:38:58,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [690282049] [2022-04-06 21:38:58,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [690282049] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:38:58,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:38:58,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:38:58,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352556657] [2022-04-06 21:38:58,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:38:58,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:38:58,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:38:58,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:38:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 21:38:58,284 INFO L87 Difference]: Start difference. First operand 464 states and 506 transitions. Second operand has 25 states, 25 states have (on average 7.08) internal successors, (177), 24 states have internal predecessors, (177), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 21:39:00,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:39:00,778 INFO L93 Difference]: Finished difference Result 493 states and 537 transitions. [2022-04-06 21:39:00,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 21:39:00,778 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.08) internal successors, (177), 24 states have internal predecessors, (177), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 223 [2022-04-06 21:39:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:39:00,780 INFO L225 Difference]: With dead ends: 493 [2022-04-06 21:39:00,780 INFO L226 Difference]: Without dead ends: 487 [2022-04-06 21:39:00,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 21:39:00,781 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 77 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:39:00,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 264 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:39:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-04-06 21:39:00,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 484. [2022-04-06 21:39:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 385 states have (on average 1.1168831168831168) internal successors, (430), 385 states have internal predecessors, (430), 50 states have call successors, (50), 50 states have call predecessors, (50), 48 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-04-06 21:39:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 528 transitions. [2022-04-06 21:39:00,944 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 528 transitions. Word has length 223 [2022-04-06 21:39:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:39:00,945 INFO L478 AbstractCegarLoop]: Abstraction has 484 states and 528 transitions. [2022-04-06 21:39:00,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.08) internal successors, (177), 24 states have internal predecessors, (177), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 21:39:00,945 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 528 transitions. [2022-04-06 21:39:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-04-06 21:39:00,946 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:39:00,946 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:39:00,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 21:39:01,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:39:01,154 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:39:01,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:39:01,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1715821683, now seen corresponding path program 41 times [2022-04-06 21:39:01,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:39:01,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1427828545] [2022-04-06 21:39:01,159 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:39:01,160 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:39:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1715821683, now seen corresponding path program 42 times [2022-04-06 21:39:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:39:01,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806340358] [2022-04-06 21:39:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:39:01,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:39:01,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:39:01,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46916881] [2022-04-06 21:39:01,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:39:01,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:39:01,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:39:01,170 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:39:01,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 21:39:01,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-04-06 21:39:01,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:39:01,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 21:39:01,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:39:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 44 proven. 2354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:39:05,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:39:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 44 proven. 1430 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-06 21:39:10,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:39:10,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806340358] [2022-04-06 21:39:10,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:39:10,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46916881] [2022-04-06 21:39:10,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46916881] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:39:10,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:39:10,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-04-06 21:39:10,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:39:10,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1427828545] [2022-04-06 21:39:10,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1427828545] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:39:10,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:39:10,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 21:39:10,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279441073] [2022-04-06 21:39:10,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:39:10,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 21:39:10,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:39:10,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 21:39:10,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 21:39:10,766 INFO L87 Difference]: Start difference. First operand 484 states and 528 transitions. Second operand has 26 states, 26 states have (on average 7.115384615384615) internal successors, (185), 25 states have internal predecessors, (185), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 21:39:13,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:39:13,435 INFO L93 Difference]: Finished difference Result 513 states and 559 transitions. [2022-04-06 21:39:13,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 21:39:13,435 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.115384615384615) internal successors, (185), 25 states have internal predecessors, (185), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 233 [2022-04-06 21:39:13,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:39:13,437 INFO L225 Difference]: With dead ends: 513 [2022-04-06 21:39:13,437 INFO L226 Difference]: Without dead ends: 507 [2022-04-06 21:39:13,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 21:39:13,437 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 98 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:39:13,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 259 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:39:13,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-04-06 21:39:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 504. [2022-04-06 21:39:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 401 states have (on average 1.1172069825436408) internal successors, (448), 401 states have internal predecessors, (448), 52 states have call successors, (52), 52 states have call predecessors, (52), 50 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-04-06 21:39:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 550 transitions. [2022-04-06 21:39:13,660 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 550 transitions. Word has length 233 [2022-04-06 21:39:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:39:13,661 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 550 transitions. [2022-04-06 21:39:13,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.115384615384615) internal successors, (185), 25 states have internal predecessors, (185), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 21:39:13,661 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 550 transitions. [2022-04-06 21:39:13,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-04-06 21:39:13,662 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:39:13,663 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:39:13,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 21:39:13,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-04-06 21:39:13,869 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:39:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:39:13,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1408937523, now seen corresponding path program 43 times [2022-04-06 21:39:13,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:39:13,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [284491017] [2022-04-06 21:39:13,877 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:39:13,877 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:39:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1408937523, now seen corresponding path program 44 times [2022-04-06 21:39:13,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:39:13,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149614326] [2022-04-06 21:39:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:39:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:39:13,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:39:13,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438021528] [2022-04-06 21:39:13,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:39:13,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:39:13,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:39:13,888 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:39:13,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 21:39:13,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:39:13,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:39:13,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 21:39:13,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:39:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 46 proven. 2576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:39:17,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:39:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 46 proven. 1564 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-04-06 21:39:23,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:39:23,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149614326] [2022-04-06 21:39:23,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:39:23,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438021528] [2022-04-06 21:39:23,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438021528] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:39:23,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:39:23,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-04-06 21:39:23,362 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:39:23,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [284491017] [2022-04-06 21:39:23,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [284491017] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:39:23,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:39:23,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:39:23,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742398625] [2022-04-06 21:39:23,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:39:23,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:39:23,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:39:23,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:39:23,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 21:39:23,363 INFO L87 Difference]: Start difference. First operand 504 states and 550 transitions. Second operand has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 26 states have internal predecessors, (193), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:39:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:39:26,045 INFO L93 Difference]: Finished difference Result 533 states and 581 transitions. [2022-04-06 21:39:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 21:39:26,046 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 26 states have internal predecessors, (193), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 243 [2022-04-06 21:39:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:39:26,048 INFO L225 Difference]: With dead ends: 533 [2022-04-06 21:39:26,048 INFO L226 Difference]: Without dead ends: 527 [2022-04-06 21:39:26,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 21:39:26,049 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:39:26,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 282 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:39:26,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-04-06 21:39:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 524. [2022-04-06 21:39:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 417 states have (on average 1.1175059952038369) internal successors, (466), 417 states have internal predecessors, (466), 54 states have call successors, (54), 54 states have call predecessors, (54), 52 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 21:39:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 572 transitions. [2022-04-06 21:39:26,271 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 572 transitions. Word has length 243 [2022-04-06 21:39:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:39:26,272 INFO L478 AbstractCegarLoop]: Abstraction has 524 states and 572 transitions. [2022-04-06 21:39:26,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 26 states have internal predecessors, (193), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:39:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 572 transitions. [2022-04-06 21:39:26,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-04-06 21:39:26,274 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:39:26,274 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:39:26,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 21:39:26,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 21:39:26,487 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:39:26,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:39:26,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1803866099, now seen corresponding path program 45 times [2022-04-06 21:39:26,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:39:26,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [840638246] [2022-04-06 21:39:26,490 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:39:26,490 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:39:26,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1803866099, now seen corresponding path program 46 times [2022-04-06 21:39:26,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:39:26,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960344574] [2022-04-06 21:39:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:39:26,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:39:26,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:39:26,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680538272] [2022-04-06 21:39:26,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:39:26,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:39:26,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:39:26,500 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:39:26,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 21:39:26,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:39:26,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:39:26,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 21:39:26,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:39:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2856 backedges. 48 proven. 2808 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:39:30,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:39:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2856 backedges. 48 proven. 1704 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-04-06 21:39:36,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:39:36,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960344574] [2022-04-06 21:39:36,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:39:36,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680538272] [2022-04-06 21:39:36,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680538272] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:39:36,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:39:36,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-04-06 21:39:36,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:39:36,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [840638246] [2022-04-06 21:39:36,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [840638246] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:39:36,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:39:36,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 21:39:36,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77262129] [2022-04-06 21:39:36,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:39:36,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 21:39:36,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:39:36,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 21:39:36,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 21:39:36,353 INFO L87 Difference]: Start difference. First operand 524 states and 572 transitions. Second operand has 28 states, 28 states have (on average 7.178571428571429) internal successors, (201), 27 states have internal predecessors, (201), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 21:39:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:39:39,192 INFO L93 Difference]: Finished difference Result 553 states and 603 transitions. [2022-04-06 21:39:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 21:39:39,197 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.178571428571429) internal successors, (201), 27 states have internal predecessors, (201), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 253 [2022-04-06 21:39:39,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:39:39,199 INFO L225 Difference]: With dead ends: 553 [2022-04-06 21:39:39,199 INFO L226 Difference]: Without dead ends: 547 [2022-04-06 21:39:39,200 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2603, Invalid=3403, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 21:39:39,200 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 83 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:39:39,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 284 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:39:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-04-06 21:39:39,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 544. [2022-04-06 21:39:39,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 433 states have (on average 1.117782909930716) internal successors, (484), 433 states have internal predecessors, (484), 56 states have call successors, (56), 56 states have call predecessors, (56), 54 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 21:39:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 594 transitions. [2022-04-06 21:39:39,428 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 594 transitions. Word has length 253 [2022-04-06 21:39:39,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:39:39,428 INFO L478 AbstractCegarLoop]: Abstraction has 544 states and 594 transitions. [2022-04-06 21:39:39,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.178571428571429) internal successors, (201), 27 states have internal predecessors, (201), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 21:39:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 594 transitions. [2022-04-06 21:39:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-04-06 21:39:39,430 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:39:39,430 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:39:39,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 21:39:39,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 21:39:39,654 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:39:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:39:39,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1159709107, now seen corresponding path program 47 times [2022-04-06 21:39:39,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:39:39,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1605503538] [2022-04-06 21:39:39,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:39:39,658 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:39:39,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1159709107, now seen corresponding path program 48 times [2022-04-06 21:39:39,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:39:39,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733947478] [2022-04-06 21:39:39,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:39:39,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:39:39,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:39:39,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047127243] [2022-04-06 21:39:39,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:39:39,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:39:39,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:39:39,667 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:39:39,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 21:39:39,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-04-06 21:39:39,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:39:39,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:39:39,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:39:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 50 proven. 3050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:39:43,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:39:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 50 proven. 1850 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-04-06 21:39:50,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:39:50,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733947478] [2022-04-06 21:39:50,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:39:50,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047127243] [2022-04-06 21:39:50,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047127243] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:39:50,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:39:50,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2022-04-06 21:39:50,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:39:50,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1605503538] [2022-04-06 21:39:50,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1605503538] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:39:50,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:39:50,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 21:39:50,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240449459] [2022-04-06 21:39:50,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:39:50,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 21:39:50,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:39:50,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 21:39:50,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 21:39:50,293 INFO L87 Difference]: Start difference. First operand 544 states and 594 transitions. Second operand has 29 states, 29 states have (on average 7.206896551724138) internal successors, (209), 28 states have internal predecessors, (209), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 21:39:53,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:39:53,302 INFO L93 Difference]: Finished difference Result 573 states and 625 transitions. [2022-04-06 21:39:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 21:39:53,303 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 7.206896551724138) internal successors, (209), 28 states have internal predecessors, (209), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 263 [2022-04-06 21:39:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:39:53,304 INFO L225 Difference]: With dead ends: 573 [2022-04-06 21:39:53,304 INFO L226 Difference]: Without dead ends: 567 [2022-04-06 21:39:53,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2811, Invalid=3669, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 21:39:53,305 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 101 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:39:53,305 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 293 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:39:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-04-06 21:39:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 564. [2022-04-06 21:39:53,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 449 states have (on average 1.1180400890868596) internal successors, (502), 449 states have internal predecessors, (502), 58 states have call successors, (58), 58 states have call predecessors, (58), 56 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-04-06 21:39:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 616 transitions. [2022-04-06 21:39:53,480 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 616 transitions. Word has length 263 [2022-04-06 21:39:53,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:39:53,480 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 616 transitions. [2022-04-06 21:39:53,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.206896551724138) internal successors, (209), 28 states have internal predecessors, (209), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 21:39:53,481 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 616 transitions. [2022-04-06 21:39:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-04-06 21:39:53,482 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:39:53,482 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:39:53,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 21:39:53,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:39:53,695 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:39:53,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:39:53,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1577550707, now seen corresponding path program 49 times [2022-04-06 21:39:53,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:39:53,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2001758431] [2022-04-06 21:39:53,702 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:39:53,702 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:39:53,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1577550707, now seen corresponding path program 50 times [2022-04-06 21:39:53,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:39:53,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304256351] [2022-04-06 21:39:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:39:53,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:39:53,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:39:53,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920173109] [2022-04-06 21:39:53,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:39:53,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:39:53,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:39:53,711 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:39:53,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 21:39:53,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:39:53,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:39:53,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 21:39:53,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:39:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3354 backedges. 52 proven. 3302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:39:58,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:40:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3354 backedges. 52 proven. 2002 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-04-06 21:40:04,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:40:04,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304256351] [2022-04-06 21:40:04,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:40:04,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920173109] [2022-04-06 21:40:04,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920173109] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:40:04,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:40:04,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-04-06 21:40:04,698 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:40:04,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2001758431] [2022-04-06 21:40:04,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2001758431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:40:04,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:40:04,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 21:40:04,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130580075] [2022-04-06 21:40:04,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:40:04,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 21:40:04,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:40:04,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 21:40:04,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 21:40:04,700 INFO L87 Difference]: Start difference. First operand 564 states and 616 transitions. Second operand has 30 states, 30 states have (on average 7.233333333333333) internal successors, (217), 29 states have internal predecessors, (217), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 21:40:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:40:07,852 INFO L93 Difference]: Finished difference Result 593 states and 647 transitions. [2022-04-06 21:40:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 21:40:07,853 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 7.233333333333333) internal successors, (217), 29 states have internal predecessors, (217), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 273 [2022-04-06 21:40:07,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:40:07,854 INFO L225 Difference]: With dead ends: 593 [2022-04-06 21:40:07,854 INFO L226 Difference]: Without dead ends: 587 [2022-04-06 21:40:07,855 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3027, Invalid=3945, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 21:40:07,856 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 114 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:40:07,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 295 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:40:07,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-04-06 21:40:08,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 584. [2022-04-06 21:40:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 465 states have (on average 1.118279569892473) internal successors, (520), 465 states have internal predecessors, (520), 60 states have call successors, (60), 60 states have call predecessors, (60), 58 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-04-06 21:40:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 638 transitions. [2022-04-06 21:40:08,038 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 638 transitions. Word has length 273 [2022-04-06 21:40:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:40:08,038 INFO L478 AbstractCegarLoop]: Abstraction has 584 states and 638 transitions. [2022-04-06 21:40:08,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.233333333333333) internal successors, (217), 29 states have internal predecessors, (217), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 21:40:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 638 transitions. [2022-04-06 21:40:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-04-06 21:40:08,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:40:08,040 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:40:08,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 21:40:08,240 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-04-06 21:40:08,240 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:40:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:40:08,241 INFO L85 PathProgramCache]: Analyzing trace with hash 663218893, now seen corresponding path program 51 times [2022-04-06 21:40:08,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:40:08,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [53666822] [2022-04-06 21:40:08,243 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:40:08,244 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:40:08,244 INFO L85 PathProgramCache]: Analyzing trace with hash 663218893, now seen corresponding path program 52 times [2022-04-06 21:40:08,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:40:08,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972368686] [2022-04-06 21:40:08,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:40:08,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:40:08,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:40:08,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720080560] [2022-04-06 21:40:08,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:40:08,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:40:08,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:40:08,257 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:40:08,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 21:40:08,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:40:08,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:40:08,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 21:40:08,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:40:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 54 proven. 3564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:40:12,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:40:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 54 proven. 2160 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-04-06 21:40:19,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:40:19,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972368686] [2022-04-06 21:40:19,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:40:19,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720080560] [2022-04-06 21:40:19,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720080560] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:40:19,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:40:19,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2022-04-06 21:40:19,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:40:19,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [53666822] [2022-04-06 21:40:19,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [53666822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:40:19,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:40:19,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 21:40:19,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820270007] [2022-04-06 21:40:19,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:40:19,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 21:40:19,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:40:19,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 21:40:19,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 21:40:19,814 INFO L87 Difference]: Start difference. First operand 584 states and 638 transitions. Second operand has 31 states, 31 states have (on average 7.258064516129032) internal successors, (225), 30 states have internal predecessors, (225), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 21:40:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:40:23,213 INFO L93 Difference]: Finished difference Result 613 states and 669 transitions. [2022-04-06 21:40:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 21:40:23,214 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 7.258064516129032) internal successors, (225), 30 states have internal predecessors, (225), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 283 [2022-04-06 21:40:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:40:23,216 INFO L225 Difference]: With dead ends: 613 [2022-04-06 21:40:23,216 INFO L226 Difference]: Without dead ends: 607 [2022-04-06 21:40:23,216 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3251, Invalid=4231, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 21:40:23,217 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 129 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:40:23,217 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 311 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:40:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-04-06 21:40:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 604. [2022-04-06 21:40:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 481 states have (on average 1.1185031185031185) internal successors, (538), 481 states have internal predecessors, (538), 62 states have call successors, (62), 62 states have call predecessors, (62), 60 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-04-06 21:40:23,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 660 transitions. [2022-04-06 21:40:23,410 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 660 transitions. Word has length 283 [2022-04-06 21:40:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:40:23,410 INFO L478 AbstractCegarLoop]: Abstraction has 604 states and 660 transitions. [2022-04-06 21:40:23,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.258064516129032) internal successors, (225), 30 states have internal predecessors, (225), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 21:40:23,410 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 660 transitions. [2022-04-06 21:40:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-04-06 21:40:23,412 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:40:23,412 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:40:23,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 21:40:23,636 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 21:40:23,637 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:40:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:40:23,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1001223923, now seen corresponding path program 53 times [2022-04-06 21:40:23,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:40:23,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1570238053] [2022-04-06 21:40:23,641 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:40:23,641 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:40:23,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1001223923, now seen corresponding path program 54 times [2022-04-06 21:40:23,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:40:23,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929103176] [2022-04-06 21:40:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:40:23,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:40:23,651 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:40:23,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465253304] [2022-04-06 21:40:23,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:40:23,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:40:23,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:40:23,653 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:40:23,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 21:40:24,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2022-04-06 21:40:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:40:24,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 21:40:24,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:40:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 56 proven. 3836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:40:29,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:40:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 56 proven. 2324 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-04-06 21:40:36,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:40:36,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929103176] [2022-04-06 21:40:36,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:40:36,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465253304] [2022-04-06 21:40:36,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465253304] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:40:36,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:40:36,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2022-04-06 21:40:36,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:40:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1570238053] [2022-04-06 21:40:36,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1570238053] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:40:36,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:40:36,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 21:40:36,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953017125] [2022-04-06 21:40:36,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:40:36,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 21:40:36,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:40:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 21:40:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 21:40:36,565 INFO L87 Difference]: Start difference. First operand 604 states and 660 transitions. Second operand has 32 states, 32 states have (on average 7.28125) internal successors, (233), 31 states have internal predecessors, (233), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 21:40:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:40:40,348 INFO L93 Difference]: Finished difference Result 633 states and 691 transitions. [2022-04-06 21:40:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 21:40:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 7.28125) internal successors, (233), 31 states have internal predecessors, (233), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 293 [2022-04-06 21:40:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:40:40,350 INFO L225 Difference]: With dead ends: 633 [2022-04-06 21:40:40,350 INFO L226 Difference]: Without dead ends: 627 [2022-04-06 21:40:40,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=3483, Invalid=4527, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 21:40:40,351 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 86 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:40:40,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 369 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 21:40:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-04-06 21:40:40,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 624. [2022-04-06 21:40:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 497 states have (on average 1.118712273641851) internal successors, (556), 497 states have internal predecessors, (556), 64 states have call successors, (64), 64 states have call predecessors, (64), 62 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-04-06 21:40:40,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 682 transitions. [2022-04-06 21:40:40,544 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 682 transitions. Word has length 293 [2022-04-06 21:40:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:40:40,544 INFO L478 AbstractCegarLoop]: Abstraction has 624 states and 682 transitions. [2022-04-06 21:40:40,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.28125) internal successors, (233), 31 states have internal predecessors, (233), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 21:40:40,545 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 682 transitions. [2022-04-06 21:40:40,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-04-06 21:40:40,546 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:40:40,547 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:40:40,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 21:40:40,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 21:40:40,755 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:40:40,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:40:40,755 INFO L85 PathProgramCache]: Analyzing trace with hash -870557875, now seen corresponding path program 55 times [2022-04-06 21:40:40,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:40:40,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1858356770] [2022-04-06 21:40:40,758 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:40:40,758 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:40:40,758 INFO L85 PathProgramCache]: Analyzing trace with hash -870557875, now seen corresponding path program 56 times [2022-04-06 21:40:40,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:40:40,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520113304] [2022-04-06 21:40:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:40:40,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:40:40,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:40:40,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910097464] [2022-04-06 21:40:40,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:40:40,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:40:40,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:40:40,767 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:40:40,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 21:40:40,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:40:40,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:40:40,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:40:40,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:40:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4176 backedges. 58 proven. 4118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:40:45,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:40:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4176 backedges. 58 proven. 2494 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-04-06 21:40:53,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:40:53,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520113304] [2022-04-06 21:40:53,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:40:53,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910097464] [2022-04-06 21:40:53,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910097464] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:40:53,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:40:53,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2022-04-06 21:40:53,648 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:40:53,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1858356770] [2022-04-06 21:40:53,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1858356770] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:40:53,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:40:53,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 21:40:53,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30359257] [2022-04-06 21:40:53,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:40:53,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 21:40:53,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:40:53,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 21:40:53,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 21:40:53,650 INFO L87 Difference]: Start difference. First operand 624 states and 682 transitions. Second operand has 33 states, 33 states have (on average 7.303030303030303) internal successors, (241), 32 states have internal predecessors, (241), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:40:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:40:57,443 INFO L93 Difference]: Finished difference Result 653 states and 713 transitions. [2022-04-06 21:40:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 21:40:57,444 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 7.303030303030303) internal successors, (241), 32 states have internal predecessors, (241), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 303 [2022-04-06 21:40:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:40:57,446 INFO L225 Difference]: With dead ends: 653 [2022-04-06 21:40:57,446 INFO L226 Difference]: Without dead ends: 647 [2022-04-06 21:40:57,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=3723, Invalid=4833, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 21:40:57,448 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 116 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:40:57,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 343 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 21:40:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-04-06 21:40:57,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 644. [2022-04-06 21:40:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 513 states have (on average 1.1189083820662769) internal successors, (574), 513 states have internal predecessors, (574), 66 states have call successors, (66), 66 states have call predecessors, (66), 64 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-04-06 21:40:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 704 transitions. [2022-04-06 21:40:57,654 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 704 transitions. Word has length 303 [2022-04-06 21:40:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:40:57,654 INFO L478 AbstractCegarLoop]: Abstraction has 644 states and 704 transitions. [2022-04-06 21:40:57,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.303030303030303) internal successors, (241), 32 states have internal predecessors, (241), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:40:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 704 transitions. [2022-04-06 21:40:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-04-06 21:40:57,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:40:57,656 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:40:57,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 21:40:57,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-04-06 21:40:57,871 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:40:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:40:57,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1381411443, now seen corresponding path program 57 times [2022-04-06 21:40:57,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:40:57,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [823739391] [2022-04-06 21:40:57,874 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:40:57,874 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:40:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1381411443, now seen corresponding path program 58 times [2022-04-06 21:40:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:40:57,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5568732] [2022-04-06 21:40:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:40:57,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:40:57,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:40:57,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229962211] [2022-04-06 21:40:57,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:40:57,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:40:57,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:40:57,883 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:40:57,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 21:40:58,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:40:58,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:40:58,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 21:40:58,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:41:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4470 backedges. 60 proven. 4410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:41:03,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:41:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4470 backedges. 60 proven. 2670 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-04-06 21:41:11,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:41:11,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5568732] [2022-04-06 21:41:11,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:41:11,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229962211] [2022-04-06 21:41:11,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229962211] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:41:11,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:41:11,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-04-06 21:41:11,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:41:11,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [823739391] [2022-04-06 21:41:11,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [823739391] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:41:11,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:41:11,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 21:41:11,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289184995] [2022-04-06 21:41:11,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:41:11,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 21:41:11,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:41:11,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 21:41:11,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 21:41:11,739 INFO L87 Difference]: Start difference. First operand 644 states and 704 transitions. Second operand has 34 states, 34 states have (on average 7.323529411764706) internal successors, (249), 33 states have internal predecessors, (249), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 21:41:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:41:15,567 INFO L93 Difference]: Finished difference Result 673 states and 735 transitions. [2022-04-06 21:41:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 21:41:15,568 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 7.323529411764706) internal successors, (249), 33 states have internal predecessors, (249), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 313 [2022-04-06 21:41:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:41:15,570 INFO L225 Difference]: With dead ends: 673 [2022-04-06 21:41:15,571 INFO L226 Difference]: Without dead ends: 667 [2022-04-06 21:41:15,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=3971, Invalid=5149, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 21:41:15,572 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 127 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:41:15,572 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 345 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 21:41:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-04-06 21:41:15,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 664. [2022-04-06 21:41:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 529 states have (on average 1.1190926275992439) internal successors, (592), 529 states have internal predecessors, (592), 68 states have call successors, (68), 68 states have call predecessors, (68), 66 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-04-06 21:41:15,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 726 transitions. [2022-04-06 21:41:15,863 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 726 transitions. Word has length 313 [2022-04-06 21:41:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:41:15,863 INFO L478 AbstractCegarLoop]: Abstraction has 664 states and 726 transitions. [2022-04-06 21:41:15,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.323529411764706) internal successors, (249), 33 states have internal predecessors, (249), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 21:41:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 726 transitions. [2022-04-06 21:41:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-04-06 21:41:15,865 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:41:15,866 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:41:15,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 21:41:16,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:41:16,072 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:41:16,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:41:16,072 INFO L85 PathProgramCache]: Analyzing trace with hash 851280845, now seen corresponding path program 59 times [2022-04-06 21:41:16,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:41:16,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1290045022] [2022-04-06 21:41:16,075 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:41:16,075 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:41:16,076 INFO L85 PathProgramCache]: Analyzing trace with hash 851280845, now seen corresponding path program 60 times [2022-04-06 21:41:16,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:41:16,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800080089] [2022-04-06 21:41:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:41:16,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:41:16,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:41:16,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470169223] [2022-04-06 21:41:16,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:41:16,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:41:16,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:41:16,084 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:41:16,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 21:41:16,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2022-04-06 21:41:16,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:41:16,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 21:41:16,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:41:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 62 proven. 4712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:41:21,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:41:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 62 proven. 2852 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-04-06 21:41:30,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:41:30,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800080089] [2022-04-06 21:41:30,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:41:30,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470169223] [2022-04-06 21:41:30,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470169223] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:41:30,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:41:30,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2022-04-06 21:41:30,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:41:30,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1290045022] [2022-04-06 21:41:30,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1290045022] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:41:30,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:41:30,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 21:41:30,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708028286] [2022-04-06 21:41:30,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:41:30,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 21:41:30,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:41:30,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 21:41:30,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 21:41:30,769 INFO L87 Difference]: Start difference. First operand 664 states and 726 transitions. Second operand has 35 states, 35 states have (on average 7.3428571428571425) internal successors, (257), 34 states have internal predecessors, (257), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 21:41:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:41:34,806 INFO L93 Difference]: Finished difference Result 693 states and 757 transitions. [2022-04-06 21:41:34,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 21:41:34,810 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 7.3428571428571425) internal successors, (257), 34 states have internal predecessors, (257), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 323 [2022-04-06 21:41:34,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:41:34,812 INFO L225 Difference]: With dead ends: 693 [2022-04-06 21:41:34,812 INFO L226 Difference]: Without dead ends: 687 [2022-04-06 21:41:34,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=4227, Invalid=5475, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 21:41:34,813 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 140 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:41:34,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 347 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 21:41:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-04-06 21:41:35,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 684. [2022-04-06 21:41:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 545 states have (on average 1.1192660550458715) internal successors, (610), 545 states have internal predecessors, (610), 70 states have call successors, (70), 70 states have call predecessors, (70), 68 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-04-06 21:41:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 748 transitions. [2022-04-06 21:41:35,041 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 748 transitions. Word has length 323 [2022-04-06 21:41:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:41:35,041 INFO L478 AbstractCegarLoop]: Abstraction has 684 states and 748 transitions. [2022-04-06 21:41:35,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 7.3428571428571425) internal successors, (257), 34 states have internal predecessors, (257), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 21:41:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 748 transitions. [2022-04-06 21:41:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-04-06 21:41:35,043 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:41:35,043 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:41:35,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-04-06 21:41:35,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-04-06 21:41:35,247 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:41:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:41:35,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1071848947, now seen corresponding path program 61 times [2022-04-06 21:41:35,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:41:35,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [405638816] [2022-04-06 21:41:35,251 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:41:35,251 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:41:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1071848947, now seen corresponding path program 62 times [2022-04-06 21:41:35,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:41:35,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845763113] [2022-04-06 21:41:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:41:35,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:41:35,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:41:35,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346479610] [2022-04-06 21:41:35,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:41:35,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:41:35,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:41:35,259 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:41:35,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 21:41:35,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:41:35,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:41:35,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 21:41:35,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:41:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5088 backedges. 64 proven. 5024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:41:41,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:41:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5088 backedges. 64 proven. 3040 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-04-06 21:41:50,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:41:50,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845763113] [2022-04-06 21:41:50,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:41:50,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346479610] [2022-04-06 21:41:50,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346479610] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:41:50,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:41:50,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2022-04-06 21:41:50,552 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:41:50,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [405638816] [2022-04-06 21:41:50,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [405638816] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:41:50,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:41:50,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 21:41:50,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315310070] [2022-04-06 21:41:50,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:41:50,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 21:41:50,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:41:50,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 21:41:50,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=2547, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 21:41:50,553 INFO L87 Difference]: Start difference. First operand 684 states and 748 transitions. Second operand has 36 states, 36 states have (on average 7.361111111111111) internal successors, (265), 35 states have internal predecessors, (265), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 21:41:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:41:55,068 INFO L93 Difference]: Finished difference Result 713 states and 779 transitions. [2022-04-06 21:41:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 21:41:55,068 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 7.361111111111111) internal successors, (265), 35 states have internal predecessors, (265), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 333 [2022-04-06 21:41:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:41:55,071 INFO L225 Difference]: With dead ends: 713 [2022-04-06 21:41:55,071 INFO L226 Difference]: Without dead ends: 707 [2022-04-06 21:41:55,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=4491, Invalid=5811, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 21:41:55,072 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 139 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:41:55,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 356 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 21:41:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-04-06 21:41:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 704. [2022-04-06 21:41:55,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 561 states have (on average 1.1194295900178253) internal successors, (628), 561 states have internal predecessors, (628), 72 states have call successors, (72), 72 states have call predecessors, (72), 70 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-04-06 21:41:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 770 transitions. [2022-04-06 21:41:55,312 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 770 transitions. Word has length 333 [2022-04-06 21:41:55,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:41:55,312 INFO L478 AbstractCegarLoop]: Abstraction has 704 states and 770 transitions. [2022-04-06 21:41:55,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.361111111111111) internal successors, (265), 35 states have internal predecessors, (265), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 21:41:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 770 transitions. [2022-04-06 21:41:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-04-06 21:41:55,315 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:41:55,315 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:41:55,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 21:41:55,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:41:55,531 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:41:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:41:55,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1786023859, now seen corresponding path program 63 times [2022-04-06 21:41:55,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:41:55,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1170593415] [2022-04-06 21:41:55,536 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:41:55,536 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:41:55,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1786023859, now seen corresponding path program 64 times [2022-04-06 21:41:55,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:41:55,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918258384] [2022-04-06 21:41:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:41:55,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:41:55,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:41:55,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218639791] [2022-04-06 21:41:55,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:41:55,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:41:55,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:41:55,548 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:41:55,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 21:41:55,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:41:55,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:41:55,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:41:55,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:42:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 66 proven. 5346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:42:01,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:42:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 66 proven. 3234 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-04-06 21:42:11,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:42:11,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918258384] [2022-04-06 21:42:11,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:42:11,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218639791] [2022-04-06 21:42:11,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218639791] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:42:11,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:42:11,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2022-04-06 21:42:11,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:42:11,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1170593415] [2022-04-06 21:42:11,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1170593415] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:42:11,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:42:11,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 21:42:11,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153253923] [2022-04-06 21:42:11,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:42:11,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 21:42:11,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:42:11,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 21:42:11,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=2692, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 21:42:11,645 INFO L87 Difference]: Start difference. First operand 704 states and 770 transitions. Second operand has 37 states, 37 states have (on average 7.378378378378378) internal successors, (273), 36 states have internal predecessors, (273), 36 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 21:42:16,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:42:16,150 INFO L93 Difference]: Finished difference Result 733 states and 801 transitions. [2022-04-06 21:42:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 21:42:16,151 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 7.378378378378378) internal successors, (273), 36 states have internal predecessors, (273), 36 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 343 [2022-04-06 21:42:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:42:16,153 INFO L225 Difference]: With dead ends: 733 [2022-04-06 21:42:16,153 INFO L226 Difference]: Without dead ends: 727 [2022-04-06 21:42:16,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=4763, Invalid=6157, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 21:42:16,154 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 142 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:42:16,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 365 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 21:42:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-04-06 21:42:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 724. [2022-04-06 21:42:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 577 states have (on average 1.1195840554592722) internal successors, (646), 577 states have internal predecessors, (646), 74 states have call successors, (74), 74 states have call predecessors, (74), 72 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-04-06 21:42:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 792 transitions. [2022-04-06 21:42:16,393 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 792 transitions. Word has length 343 [2022-04-06 21:42:16,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:42:16,393 INFO L478 AbstractCegarLoop]: Abstraction has 724 states and 792 transitions. [2022-04-06 21:42:16,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 7.378378378378378) internal successors, (273), 36 states have internal predecessors, (273), 36 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 21:42:16,393 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 792 transitions. [2022-04-06 21:42:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-04-06 21:42:16,395 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:42:16,395 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:42:16,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 21:42:16,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:42:16,595 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:42:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:42:16,596 INFO L85 PathProgramCache]: Analyzing trace with hash 231550605, now seen corresponding path program 65 times [2022-04-06 21:42:16,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:42:16,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [272493620] [2022-04-06 21:42:16,600 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:42:16,600 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:42:16,600 INFO L85 PathProgramCache]: Analyzing trace with hash 231550605, now seen corresponding path program 66 times [2022-04-06 21:42:16,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:42:16,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690811476] [2022-04-06 21:42:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:42:16,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:42:16,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:42:16,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276936897] [2022-04-06 21:42:16,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:42:16,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:42:16,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:42:16,616 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:42:16,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 21:42:16,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2022-04-06 21:42:16,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:42:16,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 21:42:16,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:42:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5746 backedges. 68 proven. 5678 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:42:23,082 INFO L328 TraceCheckSpWp]: Computing backward predicates...