/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 11:06:48,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 11:06:48,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 11:06:48,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 11:06:48,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 11:06:48,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 11:06:48,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 11:06:48,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 11:06:48,555 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 11:06:48,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 11:06:48,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 11:06:48,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 11:06:48,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 11:06:48,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 11:06:48,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 11:06:48,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 11:06:48,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 11:06:48,557 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 11:06:48,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 11:06:48,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 11:06:48,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 11:06:48,557 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 11:06:48,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 11:06:48,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 11:06:48,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 11:06:48,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 11:06:48,558 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 11:06:48,558 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 11:06:48,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 11:06:48,558 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 11:06:48,558 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 11:06:48,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 11:06:48,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 11:06:48,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 11:06:48,767 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 11:06:48,768 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 11:06:48,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2022-03-19 11:06:48,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dff67c71c/e3fbae81379d4b4bbf821280c630eaa4/FLAG7f494654e [2022-03-19 11:06:49,130 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 11:06:49,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2022-03-19 11:06:49,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dff67c71c/e3fbae81379d4b4bbf821280c630eaa4/FLAG7f494654e [2022-03-19 11:06:49,147 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dff67c71c/e3fbae81379d4b4bbf821280c630eaa4 [2022-03-19 11:06:49,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 11:06:49,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 11:06:49,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 11:06:49,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 11:06:49,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 11:06:49,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:06:49" (1/1) ... [2022-03-19 11:06:49,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f39e2c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:49, skipping insertion in model container [2022-03-19 11:06:49,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:06:49" (1/1) ... [2022-03-19 11:06:49,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 11:06:49,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 11:06:49,327 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c[538,551] [2022-03-19 11:06:49,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 11:06:49,390 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 11:06:49,399 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c[538,551] [2022-03-19 11:06:49,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 11:06:49,424 INFO L208 MainTranslator]: Completed translation [2022-03-19 11:06:49,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:49 WrapperNode [2022-03-19 11:06:49,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 11:06:49,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 11:06:49,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 11:06:49,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 11:06:49,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:49" (1/1) ... [2022-03-19 11:06:49,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:49" (1/1) ... [2022-03-19 11:06:49,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:49" (1/1) ... [2022-03-19 11:06:49,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:49" (1/1) ... [2022-03-19 11:06:49,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:49" (1/1) ... [2022-03-19 11:06:49,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:49" (1/1) ... [2022-03-19 11:06:49,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:49" (1/1) ... [2022-03-19 11:06:49,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 11:06:49,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 11:06:49,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 11:06:49,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 11:06:49,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:49" (1/1) ... [2022-03-19 11:06:49,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 11:06:49,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:06:49,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 11:06:49,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 11:06:49,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 11:06:49,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 11:06:49,507 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 11:06:49,507 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 11:06:49,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 11:06:49,507 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 11:06:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 11:06:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 11:06:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 11:06:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 11:06:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 11:06:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 11:06:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 11:06:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 11:06:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 11:06:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 11:06:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 11:06:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 11:06:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 11:06:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 11:06:49,554 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 11:06:49,556 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 11:06:49,701 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 11:06:49,705 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 11:06:49,705 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 11:06:49,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:06:49 BoogieIcfgContainer [2022-03-19 11:06:49,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 11:06:49,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 11:06:49,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 11:06:49,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 11:06:49,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:06:49" (1/3) ... [2022-03-19 11:06:49,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165b20ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:06:49, skipping insertion in model container [2022-03-19 11:06:49,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:49" (2/3) ... [2022-03-19 11:06:49,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165b20ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:06:49, skipping insertion in model container [2022-03-19 11:06:49,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:06:49" (3/3) ... [2022-03-19 11:06:49,727 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound10.c [2022-03-19 11:06:49,730 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 11:06:49,730 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 11:06:49,754 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 11:06:49,758 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 11:06:49,758 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 11:06:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 11:06:49,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 11:06:49,770 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:06:49,771 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:06:49,771 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:06:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:06:49,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-19 11:06:49,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:49,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2053777041] [2022-03-19 11:06:49,785 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:06:49,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 2 times [2022-03-19 11:06:49,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:06:49,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063568795] [2022-03-19 11:06:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:06:49,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:06:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:49,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:06:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:49,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 11:06:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:49,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 11:06:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:49,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 11:06:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 11:06:49,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:06:49,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063568795] [2022-03-19 11:06:49,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063568795] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:49,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:49,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 11:06:49,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:06:49,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2053777041] [2022-03-19 11:06:49,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2053777041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:49,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:49,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 11:06:49,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037671229] [2022-03-19 11:06:49,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:06:49,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 11:06:49,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:49,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 11:06:50,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 11:06:50,001 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 11:06:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:06:50,086 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-19 11:06:50,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 11:06:50,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-19 11:06:50,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:06:50,093 INFO L225 Difference]: With dead ends: 69 [2022-03-19 11:06:50,094 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 11:06:50,097 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 11:06:50,103 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:06:50,105 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:06:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 11:06:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 11:06:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 11:06:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-19 11:06:50,147 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-19 11:06:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:06:50,147 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-19 11:06:50,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 11:06:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-19 11:06:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 11:06:50,149 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:06:50,149 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:06:50,149 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 11:06:50,150 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:06:50,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:06:50,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-19 11:06:50,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:50,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1044300414] [2022-03-19 11:06:50,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:06:50,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 2 times [2022-03-19 11:06:50,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:06:50,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626643090] [2022-03-19 11:06:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:06:50,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:06:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:50,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:06:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:50,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 11:06:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:50,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 11:06:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:50,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 11:06:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 11:06:50,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:06:50,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626643090] [2022-03-19 11:06:50,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626643090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:50,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:50,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:06:50,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:06:50,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1044300414] [2022-03-19 11:06:50,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1044300414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:50,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:50,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:06:50,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67717822] [2022-03-19 11:06:50,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:06:50,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:06:50,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:50,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:06:50,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:06:50,295 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 11:06:50,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:06:50,441 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-19 11:06:50,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 11:06:50,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-19 11:06:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:06:50,443 INFO L225 Difference]: With dead ends: 46 [2022-03-19 11:06:50,443 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 11:06:50,443 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 11:06:50,444 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:06:50,444 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:06:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 11:06:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-19 11:06:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 11:06:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-19 11:06:50,496 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-19 11:06:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:06:50,497 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-19 11:06:50,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 11:06:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-19 11:06:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 11:06:50,498 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:06:50,498 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:06:50,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 11:06:50,498 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:06:50,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:06:50,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-19 11:06:50,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:50,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1992289787] [2022-03-19 11:06:50,499 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:06:50,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 2 times [2022-03-19 11:06:50,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:06:50,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609834924] [2022-03-19 11:06:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:06:50,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:06:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:50,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:06:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:50,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 11:06:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:50,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 11:06:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:50,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 11:06:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:50,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 11:06:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:06:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 11:06:50,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:06:50,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609834924] [2022-03-19 11:06:50,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609834924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:50,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:50,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:06:50,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:06:50,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1992289787] [2022-03-19 11:06:50,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1992289787] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:50,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:50,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:06:50,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570588236] [2022-03-19 11:06:50,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:06:50,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:06:50,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:50,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:06:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:06:50,605 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 11:06:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:06:50,730 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-19 11:06:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 11:06:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-19 11:06:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:06:50,731 INFO L225 Difference]: With dead ends: 50 [2022-03-19 11:06:50,731 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 11:06:50,731 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 11:06:50,732 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:06:50,733 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:06:50,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 11:06:50,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-19 11:06:50,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 11:06:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-19 11:06:50,750 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-19 11:06:50,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:06:50,751 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-19 11:06:50,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 11:06:50,751 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-19 11:06:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 11:06:50,752 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:06:50,753 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:06:50,753 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 11:06:50,754 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:06:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:06:50,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-19 11:06:50,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:50,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [950565995] [2022-03-19 11:06:50,756 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:06:50,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 2 times [2022-03-19 11:06:50,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:06:50,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853119069] [2022-03-19 11:06:50,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:06:50,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:06:50,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:06:50,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064432579] [2022-03-19 11:06:50,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:06:50,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:06:50,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:06:50,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:06:50,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 11:06:50,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:06:50,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:06:50,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 11:06:50,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:06:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 11:06:50,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 11:06:50,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:06:50,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853119069] [2022-03-19 11:06:50,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:06:50,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064432579] [2022-03-19 11:06:50,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064432579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:50,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:50,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:06:50,974 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:06:50,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [950565995] [2022-03-19 11:06:50,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [950565995] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:50,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:50,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:06:50,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406361679] [2022-03-19 11:06:50,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:06:50,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 11:06:50,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:50,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 11:06:50,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 11:06:50,976 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 11:06:51,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:06:51,035 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-19 11:06:51,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:06:51,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-19 11:06:51,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:06:51,036 INFO L225 Difference]: With dead ends: 69 [2022-03-19 11:06:51,036 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 11:06:51,036 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:06:51,037 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:06:51,037 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:06:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 11:06:51,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-19 11:06:51,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 11:06:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-19 11:06:51,046 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-19 11:06:51,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:06:51,046 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-19 11:06:51,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 11:06:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-19 11:06:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 11:06:51,047 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:06:51,047 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:06:51,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 11:06:51,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:06:51,265 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:06:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:06:51,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-19 11:06:51,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:51,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1928972023] [2022-03-19 11:06:51,266 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:06:51,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 2 times [2022-03-19 11:06:51,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:06:51,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685136679] [2022-03-19 11:06:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:06:51,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:06:51,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:06:51,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616300541] [2022-03-19 11:06:51,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:06:51,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:06:51,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:06:51,281 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:06:51,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 11:06:51,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:06:51,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:06:51,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 11:06:51,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:06:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 11:06:51,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:06:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 11:06:51,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:06:51,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685136679] [2022-03-19 11:06:51,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:06:51,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616300541] [2022-03-19 11:06:51,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616300541] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 11:06:51,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 11:06:51,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-19 11:06:51,633 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:06:51,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1928972023] [2022-03-19 11:06:51,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1928972023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:51,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:51,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:06:51,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725603187] [2022-03-19 11:06:51,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:06:51,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:06:51,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:51,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:06:51,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 11:06:51,634 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 11:06:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:06:51,683 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-19 11:06:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:06:51,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-19 11:06:51,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:06:51,684 INFO L225 Difference]: With dead ends: 68 [2022-03-19 11:06:51,684 INFO L226 Difference]: Without dead ends: 66 [2022-03-19 11:06:51,684 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 11:06:51,685 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:06:51,685 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:06:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-19 11:06:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-19 11:06:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 11:06:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-19 11:06:51,694 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-19 11:06:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:06:51,694 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-19 11:06:51,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 11:06:51,695 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-19 11:06:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 11:06:51,695 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:06:51,696 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:06:51,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 11:06:51,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:06:51,911 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:06:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:06:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-19 11:06:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:51,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [743914317] [2022-03-19 11:06:51,912 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:06:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 2 times [2022-03-19 11:06:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:06:51,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59639497] [2022-03-19 11:06:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:06:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:06:51,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:06:51,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175932831] [2022-03-19 11:06:51,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:06:51,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:06:51,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:06:51,934 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:06:51,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 11:06:51,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:06:51,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:06:51,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 11:06:51,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:06:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-19 11:06:52,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:06:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 11:06:52,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:06:52,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59639497] [2022-03-19 11:06:52,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:06:52,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175932831] [2022-03-19 11:06:52,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175932831] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 11:06:52,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 11:06:52,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-19 11:06:52,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:06:52,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [743914317] [2022-03-19 11:06:52,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [743914317] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:52,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:52,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:06:52,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834167808] [2022-03-19 11:06:52,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:06:52,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 11:06:52,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:52,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 11:06:52,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 11:06:52,233 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 11:06:52,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:06:52,287 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-19 11:06:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:06:52,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-03-19 11:06:52,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:06:52,288 INFO L225 Difference]: With dead ends: 76 [2022-03-19 11:06:52,288 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 11:06:52,288 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-19 11:06:52,289 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:06:52,289 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:06:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 11:06:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-19 11:06:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 11:06:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-19 11:06:52,298 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-19 11:06:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:06:52,298 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-19 11:06:52,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 11:06:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-19 11:06:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 11:06:52,299 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:06:52,299 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:06:52,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-19 11:06:52,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:06:52,516 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:06:52,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:06:52,516 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-19 11:06:52,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:52,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1112354192] [2022-03-19 11:06:52,517 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:06:52,517 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 2 times [2022-03-19 11:06:52,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:06:52,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364471838] [2022-03-19 11:06:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:06:52,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:06:52,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:06:52,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290062191] [2022-03-19 11:06:52,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:06:52,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:06:52,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:06:52,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:06:52,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 11:06:52,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:06:52,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:06:52,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 11:06:52,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:06:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 11:06:52,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 11:06:52,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:06:52,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364471838] [2022-03-19 11:06:52,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:06:52,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290062191] [2022-03-19 11:06:52,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290062191] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:52,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:52,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:06:52,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:06:52,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1112354192] [2022-03-19 11:06:52,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1112354192] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:52,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:52,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:06:52,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340563146] [2022-03-19 11:06:52,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:06:52,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 11:06:52,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:52,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 11:06:52,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 11:06:52,651 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 11:06:52,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:06:52,686 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-19 11:06:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:06:52,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-19 11:06:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:06:52,688 INFO L225 Difference]: With dead ends: 79 [2022-03-19 11:06:52,688 INFO L226 Difference]: Without dead ends: 72 [2022-03-19 11:06:52,689 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:06:52,689 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:06:52,689 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:06:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-19 11:06:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-19 11:06:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 11:06:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-19 11:06:52,698 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-19 11:06:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:06:52,698 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-19 11:06:52,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 11:06:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-19 11:06:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 11:06:52,699 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:06:52,699 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:06:52,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 11:06:52,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:06:52,921 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:06:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:06:52,921 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-03-19 11:06:52,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:52,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [93794325] [2022-03-19 11:06:52,922 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:06:52,922 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 2 times [2022-03-19 11:06:52,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:06:52,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463232828] [2022-03-19 11:06:52,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:06:52,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:06:52,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:06:52,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538243071] [2022-03-19 11:06:52,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:06:52,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:06:52,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:06:52,938 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:06:52,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 11:06:53,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:06:53,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:06:53,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 11:06:53,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:06:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-19 11:06:53,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:06:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-19 11:06:55,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:06:55,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463232828] [2022-03-19 11:06:55,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:06:55,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538243071] [2022-03-19 11:06:55,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538243071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:06:55,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:06:55,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 11:06:55,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:06:55,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [93794325] [2022-03-19 11:06:55,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [93794325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:55,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:55,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 11:06:55,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012369794] [2022-03-19 11:06:55,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:06:55,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 11:06:55,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:55,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 11:06:55,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 11:06:55,545 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 11:06:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:06:55,691 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-03-19 11:06:55,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 11:06:55,692 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-03-19 11:06:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:06:55,693 INFO L225 Difference]: With dead ends: 135 [2022-03-19 11:06:55,693 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 11:06:55,694 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-19 11:06:55,694 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:06:55,694 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 326 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:06:55,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 11:06:55,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-03-19 11:06:55,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 11:06:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-03-19 11:06:55,705 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 75 [2022-03-19 11:06:55,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:06:55,706 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-03-19 11:06:55,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 11:06:55,706 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-03-19 11:06:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 11:06:55,707 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:06:55,707 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:06:55,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-19 11:06:55,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:06:55,924 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:06:55,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:06:55,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 3 times [2022-03-19 11:06:55,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:55,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [129800308] [2022-03-19 11:06:55,924 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:06:55,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 4 times [2022-03-19 11:06:55,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:06:55,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818583319] [2022-03-19 11:06:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:06:55,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:06:55,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:06:55,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143891499] [2022-03-19 11:06:55,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 11:06:55,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:06:55,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:06:55,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:06:55,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 11:06:55,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 11:06:55,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:06:55,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 11:06:55,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:06:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-19 11:06:56,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:06:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-19 11:06:57,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:06:57,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818583319] [2022-03-19 11:06:57,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:06:57,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143891499] [2022-03-19 11:06:57,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143891499] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:06:57,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:06:57,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-19 11:06:57,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:06:57,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [129800308] [2022-03-19 11:06:57,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [129800308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:06:57,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:06:57,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 11:06:57,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692968357] [2022-03-19 11:06:57,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:06:57,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 11:06:57,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:57,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 11:06:57,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 11:06:57,949 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 11:06:58,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:06:58,069 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-03-19 11:06:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 11:06:58,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-19 11:06:58,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:06:58,071 INFO L225 Difference]: With dead ends: 133 [2022-03-19 11:06:58,071 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 11:06:58,071 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-19 11:06:58,072 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:06:58,072 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 265 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:06:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 11:06:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-19 11:06:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 11:06:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-03-19 11:06:58,083 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 80 [2022-03-19 11:06:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:06:58,083 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-03-19 11:06:58,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 11:06:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-03-19 11:06:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 11:06:58,084 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:06:58,084 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:06:58,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 11:06:58,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:06:58,300 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:06:58,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:06:58,300 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-03-19 11:06:58,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:06:58,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1140281703] [2022-03-19 11:06:58,300 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:06:58,300 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 2 times [2022-03-19 11:06:58,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:06:58,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428300526] [2022-03-19 11:06:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:06:58,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:06:58,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:06:58,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146167958] [2022-03-19 11:06:58,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:06:58,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:06:58,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:06:58,316 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:06:58,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 11:06:58,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:06:58,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:06:58,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 11:06:58,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:06:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 11:06:59,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:07:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 11:07:13,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:07:13,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428300526] [2022-03-19 11:07:13,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:07:13,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146167958] [2022-03-19 11:07:13,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146167958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:07:13,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:07:13,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-19 11:07:13,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:07:13,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1140281703] [2022-03-19 11:07:13,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1140281703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:13,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:13,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 11:07:13,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937039366] [2022-03-19 11:07:13,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:07:13,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 11:07:13,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:13,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 11:07:13,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-19 11:07:13,530 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 11:07:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:07:14,622 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2022-03-19 11:07:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 11:07:14,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-03-19 11:07:14,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:07:14,624 INFO L225 Difference]: With dead ends: 116 [2022-03-19 11:07:14,624 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 11:07:14,624 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-03-19 11:07:14,626 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 11:07:14,626 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 342 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 11:07:14,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 11:07:14,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-19 11:07:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 11:07:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2022-03-19 11:07:14,640 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 86 [2022-03-19 11:07:14,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:07:14,641 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2022-03-19 11:07:14,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 11:07:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2022-03-19 11:07:14,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 11:07:14,646 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:07:14,646 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:07:14,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 11:07:14,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:14,884 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:07:14,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:07:14,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 5 times [2022-03-19 11:07:14,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:14,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [518688217] [2022-03-19 11:07:14,885 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:07:14,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 6 times [2022-03-19 11:07:14,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:07:14,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074467462] [2022-03-19 11:07:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:07:14,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:07:14,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:07:14,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84148425] [2022-03-19 11:07:14,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 11:07:14,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:14,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:07:14,916 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:07:14,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 11:07:14,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 11:07:14,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:07:14,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 11:07:14,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:07:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-19 11:07:29,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:08:18,282 WARN L232 SmtUtils]: Spent 27.66s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 11:09:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-19 11:09:20,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:09:20,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074467462] [2022-03-19 11:09:20,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:09:20,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84148425] [2022-03-19 11:09:20,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84148425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:09:20,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:09:20,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2022-03-19 11:09:20,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:09:20,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [518688217] [2022-03-19 11:09:20,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [518688217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:09:20,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:09:20,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 11:09:20,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847872026] [2022-03-19 11:09:20,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:09:20,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 11:09:20,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:09:20,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 11:09:20,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=162, Unknown=2, NotChecked=0, Total=210 [2022-03-19 11:09:20,407 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 11:09:22,416 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 11:09:23,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 11:09:24,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:09:24,276 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-03-19 11:09:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 11:09:24,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2022-03-19 11:09:24,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:09:24,278 INFO L225 Difference]: With dead ends: 112 [2022-03-19 11:09:24,278 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 11:09:24,278 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=59, Invalid=211, Unknown=2, NotChecked=0, Total=272 [2022-03-19 11:09:24,279 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-19 11:09:24,279 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 258 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 211 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-03-19 11:09:24,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 11:09:24,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-19 11:09:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.11864406779661) internal successors, (66), 63 states have internal predecessors, (66), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 11:09:24,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2022-03-19 11:09:24,290 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 92 [2022-03-19 11:09:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:09:24,291 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2022-03-19 11:09:24,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 11:09:24,291 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2022-03-19 11:09:24,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 11:09:24,292 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:09:24,292 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:09:24,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 11:09:24,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 11:09:24,496 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:09:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:09:24,496 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 7 times [2022-03-19 11:09:24,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:09:24,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1115986914] [2022-03-19 11:09:24,497 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:09:24,497 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 8 times [2022-03-19 11:09:24,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:09:24,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612975812] [2022-03-19 11:09:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:09:24,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:09:24,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:09:24,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722442336] [2022-03-19 11:09:24,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:09:24,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:09:24,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:09:24,523 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:09:24,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 11:09:24,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:09:24,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:09:24,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 11:09:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:09:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-19 11:09:25,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:09:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-19 11:09:27,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:09:27,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612975812] [2022-03-19 11:09:27,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:09:27,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722442336] [2022-03-19 11:09:27,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722442336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:09:27,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:09:27,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 11:09:27,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:09:27,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1115986914] [2022-03-19 11:09:27,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1115986914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:09:27,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:09:27,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 11:09:27,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446262220] [2022-03-19 11:09:27,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:09:27,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 11:09:27,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:09:27,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 11:09:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-19 11:09:27,509 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 11:09:27,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:09:27,749 INFO L93 Difference]: Finished difference Result 177 states and 223 transitions. [2022-03-19 11:09:27,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 11:09:27,749 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2022-03-19 11:09:27,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:09:27,751 INFO L225 Difference]: With dead ends: 177 [2022-03-19 11:09:27,751 INFO L226 Difference]: Without dead ends: 138 [2022-03-19 11:09:27,752 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-19 11:09:27,753 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:09:27,753 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 400 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:09:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-19 11:09:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-03-19 11:09:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 88 states have internal predecessors, (92), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-19 11:09:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-03-19 11:09:27,771 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 97 [2022-03-19 11:09:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:09:27,782 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-03-19 11:09:27,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 11:09:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-03-19 11:09:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 11:09:27,783 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:09:27,783 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:09:27,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 11:09:27,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:09:27,992 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:09:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:09:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 9 times [2022-03-19 11:09:27,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:09:27,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [472591035] [2022-03-19 11:09:27,992 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:09:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 10 times [2022-03-19 11:09:27,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:09:27,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226361589] [2022-03-19 11:09:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:09:27,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:09:28,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:09:28,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611630536] [2022-03-19 11:09:28,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 11:09:28,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:09:28,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:09:28,022 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:09:28,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 11:09:28,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 11:09:28,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:09:28,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 11:09:28,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:09:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 58 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 11:09:29,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:10:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 58 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 11:10:16,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:10:16,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226361589] [2022-03-19 11:10:16,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:10:16,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611630536] [2022-03-19 11:10:16,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611630536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:10:16,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:10:16,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-19 11:10:16,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:10:16,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [472591035] [2022-03-19 11:10:16,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [472591035] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:10:16,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:10:16,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 11:10:16,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6863435] [2022-03-19 11:10:16,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:10:16,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 11:10:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:10:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 11:10:16,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-03-19 11:10:16,875 INFO L87 Difference]: Start difference. First operand 138 states and 167 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 11:10:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:10:18,147 INFO L93 Difference]: Finished difference Result 184 states and 208 transitions. [2022-03-19 11:10:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 11:10:18,147 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 105 [2022-03-19 11:10:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:10:18,148 INFO L225 Difference]: With dead ends: 184 [2022-03-19 11:10:18,148 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 11:10:18,149 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-03-19 11:10:18,149 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 11:10:18,149 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 511 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 11:10:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 11:10:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-19 11:10:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 95 states have internal predecessors, (98), 36 states have call successors, (36), 21 states have call predecessors, (36), 20 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-19 11:10:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2022-03-19 11:10:18,180 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 105 [2022-03-19 11:10:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:10:18,181 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2022-03-19 11:10:18,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 11:10:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2022-03-19 11:10:18,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-19 11:10:18,188 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:10:18,188 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:10:18,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 11:10:18,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 11:10:18,402 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:10:18,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:10:18,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 11 times [2022-03-19 11:10:18,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:10:18,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [41336890] [2022-03-19 11:10:18,403 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:10:18,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 12 times [2022-03-19 11:10:18,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:10:18,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894568775] [2022-03-19 11:10:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:10:18,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:10:18,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:10:18,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105412751] [2022-03-19 11:10:18,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 11:10:18,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:10:18,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:10:18,421 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:10:18,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 11:10:18,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 11:10:18,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:10:18,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 11:10:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:10:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 96 proven. 4 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2022-03-19 11:10:19,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:10:19,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:10:19,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894568775] [2022-03-19 11:10:19,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:10:19,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105412751] [2022-03-19 11:10:19,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105412751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 11:10:19,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 11:10:19,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 11:10:19,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:10:19,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [41336890] [2022-03-19 11:10:19,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [41336890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:10:19,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:10:19,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 11:10:19,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571948964] [2022-03-19 11:10:19,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:10:19,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 11:10:19,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:10:19,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 11:10:19,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-03-19 11:10:19,548 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-19 11:10:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:10:19,884 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-03-19 11:10:19,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 11:10:19,884 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 114 [2022-03-19 11:10:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:10:19,885 INFO L225 Difference]: With dead ends: 168 [2022-03-19 11:10:19,885 INFO L226 Difference]: Without dead ends: 156 [2022-03-19 11:10:19,885 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 11:10:19,886 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 20 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 11:10:19,886 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 288 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 215 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-03-19 11:10:19,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-19 11:10:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-03-19 11:10:19,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 100 states have internal predecessors, (103), 38 states have call successors, (38), 22 states have call predecessors, (38), 21 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-19 11:10:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 176 transitions. [2022-03-19 11:10:19,899 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 176 transitions. Word has length 114 [2022-03-19 11:10:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:10:19,899 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 176 transitions. [2022-03-19 11:10:19,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-19 11:10:19,899 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 176 transitions. [2022-03-19 11:10:19,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 11:10:19,900 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:10:19,900 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:10:19,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-19 11:10:20,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 11:10:20,116 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:10:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:10:20,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 3 times [2022-03-19 11:10:20,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:10:20,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [502346693] [2022-03-19 11:10:20,117 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:10:20,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 4 times [2022-03-19 11:10:20,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:10:20,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099841329] [2022-03-19 11:10:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:10:20,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:10:20,124 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:10:20,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748094879] [2022-03-19 11:10:20,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 11:10:20,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:10:20,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:10:20,126 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:10:20,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 11:10:20,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 11:10:20,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:10:20,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 11:10:20,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:10:20,884 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 11:10:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-03-19 11:10:20,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:10:21,041 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 11:10:32,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:10:32,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099841329] [2022-03-19 11:10:32,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:10:32,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748094879] [2022-03-19 11:10:32,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748094879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 11:10:32,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 11:10:32,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 11:10:32,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:10:32,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [502346693] [2022-03-19 11:10:32,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [502346693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:10:32,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:10:32,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 11:10:32,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314285692] [2022-03-19 11:10:32,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:10:32,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 11:10:32,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:10:32,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 11:10:32,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-19 11:10:32,036 INFO L87 Difference]: Start difference. First operand 155 states and 176 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 11:10:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:10:33,405 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2022-03-19 11:10:33,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 11:10:33,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 116 [2022-03-19 11:10:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:10:33,407 INFO L225 Difference]: With dead ends: 161 [2022-03-19 11:10:33,407 INFO L226 Difference]: Without dead ends: 124 [2022-03-19 11:10:33,407 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-03-19 11:10:33,409 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 11:10:33,409 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 438 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 11:10:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-19 11:10:33,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-19 11:10:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 79 states have internal predecessors, (82), 31 states have call successors, (31), 18 states have call predecessors, (31), 17 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-19 11:10:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2022-03-19 11:10:33,419 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 116 [2022-03-19 11:10:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:10:33,420 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2022-03-19 11:10:33,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 11:10:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2022-03-19 11:10:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-19 11:10:33,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:10:33,420 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:10:33,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-19 11:10:33,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 11:10:33,627 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:10:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:10:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1921791003, now seen corresponding path program 5 times [2022-03-19 11:10:33,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:10:33,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1356491531] [2022-03-19 11:10:33,629 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:10:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1921791003, now seen corresponding path program 6 times [2022-03-19 11:10:33,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:10:33,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563927403] [2022-03-19 11:10:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:10:33,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:10:33,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:10:33,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982194271] [2022-03-19 11:10:33,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 11:10:33,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:10:33,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:10:33,645 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:10:33,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 11:10:33,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 11:10:33,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:10:33,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 11:10:33,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:10:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-03-19 11:10:33,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:10:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2022-03-19 11:10:34,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:10:34,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563927403] [2022-03-19 11:10:34,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:10:34,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982194271] [2022-03-19 11:10:34,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982194271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:10:34,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:10:34,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2022-03-19 11:10:34,200 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:10:34,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1356491531] [2022-03-19 11:10:34,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1356491531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:10:34,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:10:34,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:10:34,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579871633] [2022-03-19 11:10:34,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:10:34,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:10:34,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:10:34,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:10:34,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:10:34,202 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-19 11:10:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:10:34,282 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2022-03-19 11:10:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 11:10:34,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 120 [2022-03-19 11:10:34,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:10:34,284 INFO L225 Difference]: With dead ends: 150 [2022-03-19 11:10:34,284 INFO L226 Difference]: Without dead ends: 137 [2022-03-19 11:10:34,285 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 230 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:10:34,285 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 20 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:10:34,285 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 112 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:10:34,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-19 11:10:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-19 11:10:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 83 states have (on average 1.108433734939759) internal successors, (92), 87 states have internal predecessors, (92), 36 states have call successors, (36), 18 states have call predecessors, (36), 17 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 11:10:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2022-03-19 11:10:34,314 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 120 [2022-03-19 11:10:34,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:10:34,315 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2022-03-19 11:10:34,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-19 11:10:34,316 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2022-03-19 11:10:34,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 11:10:34,325 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:10:34,325 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:10:34,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 11:10:34,526 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 11:10:34,526 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:10:34,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:10:34,526 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 13 times [2022-03-19 11:10:34,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:10:34,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [953016142] [2022-03-19 11:10:34,527 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:10:34,527 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 14 times [2022-03-19 11:10:34,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:10:34,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320599362] [2022-03-19 11:10:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:10:34,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:10:34,532 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:10:34,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108145670] [2022-03-19 11:10:34,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:10:34,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:10:34,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:10:34,535 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:10:34,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 11:10:34,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:10:34,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:10:34,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 11:10:34,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:10:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2022-03-19 11:10:35,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:10:56,430 WARN L232 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 11:11:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-03-19 11:11:29,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:11:29,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320599362] [2022-03-19 11:11:29,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:11:29,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108145670] [2022-03-19 11:11:29,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108145670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:11:29,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:11:29,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2022-03-19 11:11:29,547 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:11:29,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [953016142] [2022-03-19 11:11:29,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [953016142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:11:29,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:11:29,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 11:11:29,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550853299] [2022-03-19 11:11:29,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:11:29,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 11:11:29,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:11:29,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 11:11:29,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=471, Unknown=1, NotChecked=0, Total=600 [2022-03-19 11:11:29,548 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-19 11:11:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:11:30,788 INFO L93 Difference]: Finished difference Result 241 states and 293 transitions. [2022-03-19 11:11:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 11:11:30,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 122 [2022-03-19 11:11:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:11:30,789 INFO L225 Difference]: With dead ends: 241 [2022-03-19 11:11:30,789 INFO L226 Difference]: Without dead ends: 195 [2022-03-19 11:11:30,789 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=136, Invalid=565, Unknown=1, NotChecked=0, Total=702 [2022-03-19 11:11:30,790 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 30 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 11:11:30,790 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 519 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 11:11:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-19 11:11:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2022-03-19 11:11:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 123 states have internal predecessors, (131), 49 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-19 11:11:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 227 transitions. [2022-03-19 11:11:30,806 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 227 transitions. Word has length 122 [2022-03-19 11:11:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:11:30,806 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 227 transitions. [2022-03-19 11:11:30,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-19 11:11:30,806 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 227 transitions. [2022-03-19 11:11:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 11:11:30,807 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:11:30,807 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:11:30,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-19 11:11:31,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:11:31,022 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:11:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:11:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1224833083, now seen corresponding path program 15 times [2022-03-19 11:11:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:11:31,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1728661084] [2022-03-19 11:11:31,023 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:11:31,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1224833083, now seen corresponding path program 16 times [2022-03-19 11:11:31,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:11:31,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208097686] [2022-03-19 11:11:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:11:31,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:11:31,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:11:31,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501604779] [2022-03-19 11:11:31,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 11:11:31,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:11:31,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:11:31,033 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:11:31,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 11:11:31,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 11:11:31,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:11:31,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 11:11:31,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:11:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-03-19 11:11:31,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:11:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-19 11:11:49,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:11:49,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208097686] [2022-03-19 11:11:49,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:11:49,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501604779] [2022-03-19 11:11:49,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501604779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:11:49,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:11:49,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2022-03-19 11:11:49,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:11:49,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1728661084] [2022-03-19 11:11:49,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1728661084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:11:49,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:11:49,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 11:11:49,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464000183] [2022-03-19 11:11:49,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:11:49,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 11:11:49,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:11:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 11:11:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-03-19 11:11:49,528 INFO L87 Difference]: Start difference. First operand 192 states and 227 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-19 11:11:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:11:50,399 INFO L93 Difference]: Finished difference Result 238 states and 285 transitions. [2022-03-19 11:11:50,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 11:11:50,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) Word has length 127 [2022-03-19 11:11:50,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:11:50,400 INFO L225 Difference]: With dead ends: 238 [2022-03-19 11:11:50,400 INFO L226 Difference]: Without dead ends: 209 [2022-03-19 11:11:50,401 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 11:11:50,401 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 33 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 11:11:50,401 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 699 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 11:11:50,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-19 11:11:50,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2022-03-19 11:11:50,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 128 states have (on average 1.1015625) internal successors, (141), 135 states have internal predecessors, (141), 52 states have call successors, (52), 27 states have call predecessors, (52), 26 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-19 11:11:50,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 242 transitions. [2022-03-19 11:11:50,420 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 242 transitions. Word has length 127 [2022-03-19 11:11:50,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:11:50,420 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 242 transitions. [2022-03-19 11:11:50,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-19 11:11:50,421 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 242 transitions. [2022-03-19 11:11:50,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 11:11:50,421 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:11:50,421 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:11:50,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-19 11:11:50,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 11:11:50,637 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:11:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:11:50,638 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 17 times [2022-03-19 11:11:50,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:11:50,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [262745915] [2022-03-19 11:11:50,638 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:11:50,638 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 18 times [2022-03-19 11:11:50,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:11:50,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619241005] [2022-03-19 11:11:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:11:50,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:11:50,643 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:11:50,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644149491] [2022-03-19 11:11:50,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 11:11:50,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:11:50,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:11:50,644 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:11:50,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 11:11:50,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 11:11:50,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:11:50,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-19 11:11:50,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:12:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 134 proven. 50 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-03-19 11:12:39,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:13:21,435 WARN L232 SmtUtils]: Spent 27.87s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 11:14:10,553 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse11 (mod c_main_~B~0 4294967296))) (or (let ((.cse5 (= (mod c_main_~p~0 2) 0)) (.cse0 (div c_main_~d~0 2)) (.cse12 (div c_main_~p~0 2))) (let ((.cse9 (< c_main_~d~0 0)) (.cse8 (= (mod c_main_~d~0 2) 0)) (.cse4 (* (+ c_main_~q~0 c_main_~p~0 .cse12 1) .cse11)) (.cse1 (mod c_main_~A~0 4294967296)) (.cse6 (* .cse11 (+ c_main_~q~0 c_main_~p~0 .cse12))) (.cse2 (* (- 1) c_main_~d~0)) (.cse3 (* (- 1) .cse0)) (.cse7 (not .cse5))) (and (or (not (<= (+ c_main_~d~0 .cse0 1) c_main_~r~0)) (and (or (= .cse1 (+ (- 1) .cse2 c_main_~r~0 .cse3 .cse4)) .cse5) (or (= .cse1 (+ (- 1) .cse6 .cse2 c_main_~r~0 .cse3)) .cse7)) .cse8 (not .cse9)) (or (not (<= (+ c_main_~d~0 .cse0) c_main_~r~0)) (and .cse9 (not .cse8)) (let ((.cse10 (< c_main_~p~0 0))) (and (or (= .cse1 (+ .cse2 c_main_~r~0 .cse3 .cse4)) .cse5 (not .cse10)) (or (= .cse1 (+ .cse6 .cse2 c_main_~r~0 .cse3)) (and .cse7 .cse10)))))))) (= c_main_~p~0 1) (not (= c_main_~d~0 (* c_main_~p~0 .cse11))))) is different from true [2022-03-19 11:15:41,343 WARN L232 SmtUtils]: Spent 52.39s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 11:18:18,311 WARN L232 SmtUtils]: Spent 40.35s on a formula simplification that was a NOOP. DAG size: 134 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 11:21:15,036 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (div c_main_~d~0 2))) (let ((.cse85 (+ .cse7 1))) (let ((.cse44 (div .cse85 2)) (.cse42 (= (mod .cse85 2) 0)) (.cse20 (div .cse7 2)) (.cse24 (< .cse7 0)) (.cse22 (= 0 (mod .cse7 2))) (.cse47 (< c_main_~d~0 0)) (.cse46 (= (mod c_main_~d~0 2) 0))) (let ((.cse41 (and .cse47 (not .cse46))) (.cse21 (and .cse24 (not .cse22))) (.cse23 (+ .cse20 1)) (.cse45 (not .cse42)) (.cse43 (+ .cse44 1)) (.cse15 (* (- 1) .cse7)) (.cse11 (mod c_main_~A~0 4294967296)) (.cse6 (mod c_main_~B~0 4294967296)) (.cse0 (div c_main_~p~0 2)) (.cse52 (= (mod c_main_~p~0 2) 0)) (.cse53 (< c_main_~p~0 0))) (and (or (= .cse0 1) (let ((.cse37 (div .cse0 2))) (let ((.cse9 (* .cse6 .cse37)) (.cse51 (+ .cse37 1))) (let ((.cse16 (= (mod .cse51 2) 0)) (.cse19 (* .cse51 .cse6)) (.cse49 (div .cse51 2)) (.cse38 (div .cse9 2)) (.cse36 (= (mod .cse37 2) 0)) (.cse50 (div .cse37 2))) (let ((.cse18 (= (mod .cse0 2) 0)) (.cse35 (* .cse6 (+ c_main_~q~0 .cse50 .cse0 .cse37 1))) (.cse31 (not .cse36)) (.cse32 (* (- 1) .cse9)) (.cse33 (* (- 1) .cse38)) (.cse34 (* (+ c_main_~q~0 .cse50 .cse0 .cse37) .cse6)) (.cse28 (= (mod .cse9 2) 0)) (.cse17 (* .cse6 (+ c_main_~q~0 2 .cse49 .cse0 .cse37))) (.cse12 (* (+ c_main_~q~0 .cse49 .cse0 .cse37 1) .cse6)) (.cse13 (* (- 1) (div .cse19 2))) (.cse14 (* (- 1) .cse19)) (.cse10 (not .cse16)) (.cse3 (= (mod .cse19 2) 0)) (.cse8 (div (+ .cse6 .cse9) 2)) (.cse48 (< .cse0 0))) (let ((.cse1 (not .cse48)) (.cse2 (not (<= (+ .cse6 .cse7 .cse8 .cse9 1) c_main_~r~0))) (.cse5 (not .cse3)) (.cse4 (and (or .cse16 (= .cse11 (+ (- 1) .cse13 c_main_~r~0 .cse14 .cse15 .cse17))) (or (= .cse11 (+ (- 1) .cse12 .cse13 c_main_~r~0 .cse14 .cse15)) .cse10))) (.cse29 (not .cse28)) (.cse25 (not (<= (+ .cse7 .cse9 .cse38 1) c_main_~r~0))) (.cse27 (and (or .cse36 (= (+ .cse32 (- 1) .cse33 c_main_~r~0 .cse15 .cse35) .cse11)) (or .cse31 (= .cse11 (+ .cse32 (- 1) .cse33 .cse34 c_main_~r~0 .cse15))))) (.cse39 (and (not .cse18) .cse48)) (.cse40 (= .cse37 1))) (and (or (and (or .cse1 (and (or .cse2 .cse3 .cse4) (or .cse5 (not (<= (+ .cse6 .cse7 .cse8 .cse9) c_main_~r~0)) (and (or .cse10 (= .cse11 (+ .cse12 .cse13 c_main_~r~0 .cse14 .cse15))) (or .cse16 (= .cse11 (+ .cse13 c_main_~r~0 .cse14 .cse15 .cse17)))))) .cse18 (and (or (not (= .cse19 .cse20)) .cse21) (or .cse22 (not (= .cse19 .cse23))))) (or (and (or (not (= .cse20 .cse9)) .cse21) (or (not .cse24) .cse22 (not (= .cse23 .cse9)))) (let ((.cse26 (< .cse9 0))) (and (or .cse25 (not .cse26) .cse27 .cse28) (or (and .cse29 .cse26) (let ((.cse30 (< .cse37 0))) (and (or (and .cse30 .cse31) (= .cse11 (+ .cse32 .cse33 .cse34 c_main_~r~0 .cse15))) (or (= .cse11 (+ .cse32 .cse33 c_main_~r~0 .cse15 .cse35)) (not .cse30) .cse36))) (not (<= (+ .cse7 .cse9 .cse38) c_main_~r~0))))) .cse39 .cse40)) .cse41) (or (and (or .cse1 .cse18 (and (or .cse42 (not (= .cse19 .cse43))) (or (not (= .cse19 .cse44)) .cse45)) (and (or .cse2 .cse5 .cse4) (or (and (or .cse16 (= (+ (- 2) .cse13 c_main_~r~0 .cse14 .cse15 .cse17) .cse11)) (or (= .cse11 (+ .cse12 (- 2) .cse13 c_main_~r~0 .cse14 .cse15)) .cse10)) (not (<= (+ 2 .cse6 .cse7 .cse8 .cse9) c_main_~r~0)) .cse3))) (or (and (or (not (<= (+ 2 .cse7 .cse9 .cse38) c_main_~r~0)) .cse28 (and (or .cse36 (= .cse11 (+ .cse32 .cse33 (- 2) c_main_~r~0 .cse15 .cse35))) (or (= (+ .cse32 .cse33 (- 2) .cse34 c_main_~r~0 .cse15) .cse11) .cse31))) (or .cse29 .cse25 .cse27)) .cse39 (and (or (not (= .cse43 .cse9)) .cse42) (or (not (= .cse44 .cse9)) .cse45)) .cse40)) .cse46 (not .cse47)))))))) (and (not .cse52) .cse53)) (or (let ((.cse82 (+ .cse0 1))) (let ((.cse80 (div .cse82 2))) (let ((.cse54 (* .cse80 .cse6)) (.cse84 (+ .cse80 1))) (let ((.cse69 (= (mod .cse84 2) 0)) (.cse81 (div .cse84 2)) (.cse79 (* .cse6 .cse84)) (.cse55 (div .cse54 2)) (.cse56 (= (mod .cse80 2) 0)) (.cse83 (div .cse80 2))) (let ((.cse65 (= (mod .cse54 2) 0)) (.cse61 (* (+ c_main_~q~0 .cse80 .cse83 .cse0 1) .cse6)) (.cse60 (not .cse56)) (.cse57 (* (- 1) .cse54)) (.cse58 (* (+ c_main_~q~0 .cse80 .cse83 2 .cse0) .cse6)) (.cse59 (* (- 1) .cse55)) (.cse78 (= (mod .cse82 2) 0)) (.cse76 (= (mod .cse79 2) 0)) (.cse67 (div (+ .cse54 .cse6) 2)) (.cse74 (* .cse6 (+ c_main_~q~0 .cse80 2 .cse81 .cse0))) (.cse73 (not .cse69)) (.cse70 (* .cse6 (+ c_main_~q~0 .cse80 3 .cse81 .cse0))) (.cse71 (* .cse79 (- 1))) (.cse72 (* (- 1) (div .cse79 2)))) (let ((.cse75 (and (or (= (+ (- 1) .cse71 .cse72 c_main_~r~0 .cse15 .cse74) .cse11) .cse73) (or .cse69 (= (+ .cse70 (- 1) .cse71 .cse72 c_main_~r~0 .cse15) .cse11)))) (.cse77 (not (<= (+ .cse54 .cse6 .cse7 .cse67 1) c_main_~r~0))) (.cse68 (not .cse76)) (.cse66 (not .cse78)) (.cse63 (not (<= (+ .cse54 .cse7 .cse55 1) c_main_~r~0))) (.cse64 (and (or (= (+ .cse57 (- 1) c_main_~r~0 .cse59 .cse15 .cse61) .cse11) .cse60) (or (= .cse11 (+ .cse57 (- 1) .cse58 c_main_~r~0 .cse59 .cse15)) .cse56))) (.cse62 (not .cse65))) (and (or .cse41 (and (or (and (or (not (<= (+ .cse54 .cse7 .cse55) c_main_~r~0)) (and (or .cse56 (= .cse11 (+ .cse57 .cse58 c_main_~r~0 .cse59 .cse15))) (or .cse60 (= .cse11 (+ .cse57 c_main_~r~0 .cse59 .cse15 .cse61)))) .cse62) (or .cse63 .cse64 .cse65)) .cse66 (and (or (not (= .cse54 .cse20)) .cse21) (or .cse22 (not (= .cse54 .cse23))))) (or (and (or (not (<= (+ .cse54 .cse6 .cse7 .cse67) c_main_~r~0)) .cse68 (and (or .cse69 (= .cse11 (+ .cse70 .cse71 .cse72 c_main_~r~0 .cse15))) (or .cse73 (= (+ .cse71 .cse72 c_main_~r~0 .cse15 .cse74) .cse11)))) (or .cse75 .cse76 .cse77)) .cse78 (and (or (not (= .cse79 .cse20)) .cse21) (or .cse22 (not (= .cse79 .cse23))))))) (or (and (or .cse78 (and (or .cse42 (not (= .cse79 .cse43))) (or (not (= .cse79 .cse44)) .cse45)) (and (or .cse75 .cse77 .cse68) (or (not (<= (+ .cse54 2 .cse6 .cse7 .cse67) c_main_~r~0)) (and (or (= .cse11 (+ .cse70 (- 2) .cse71 .cse72 c_main_~r~0 .cse15)) .cse69) (or .cse73 (= .cse11 (+ (- 2) .cse71 .cse72 c_main_~r~0 .cse15 .cse74)))) .cse76))) (or .cse66 (and (or .cse63 .cse64 .cse62) (or (and (or (= .cse11 (+ .cse57 (- 2) .cse58 c_main_~r~0 .cse59 .cse15)) .cse56) (or .cse60 (= .cse11 (+ .cse57 (- 2) c_main_~r~0 .cse59 .cse15 .cse61)))) (not (<= (+ .cse54 2 .cse7 .cse55) c_main_~r~0)) .cse65)) (and (or (not (= .cse54 .cse44)) .cse45) (or .cse42 (not (= .cse54 .cse43)))))) .cse46)))))))) .cse52 (not .cse53))))))) is different from false