/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/egcd-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 02:34:08,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 02:34:08,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 02:34:08,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 02:34:08,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 02:34:08,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 02:34:09,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 02:34:09,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 02:34:09,008 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 02:34:09,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 02:34:09,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 02:34:09,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 02:34:09,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 02:34:09,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 02:34:09,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 02:34:09,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 02:34:09,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 02:34:09,010 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 02:34:09,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 02:34:09,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 02:34:09,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 02:34:09,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 02:34:09,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 02:34:09,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:34:09,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 02:34:09,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 02:34:09,011 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 02:34:09,011 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 02:34:09,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 02:34:09,012 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 02:34:09,012 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 02:34:09,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 02:34:09,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 02:34:09,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 02:34:09,246 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 02:34:09,247 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 02:34:09,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound5.c [2022-03-18 02:34:09,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b23b464c8/b03960dd08814726bf638a34d96ddab1/FLAG15ff66e87 [2022-03-18 02:34:09,595 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 02:34:09,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound5.c [2022-03-18 02:34:09,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b23b464c8/b03960dd08814726bf638a34d96ddab1/FLAG15ff66e87 [2022-03-18 02:34:10,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b23b464c8/b03960dd08814726bf638a34d96ddab1 [2022-03-18 02:34:10,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 02:34:10,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 02:34:10,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 02:34:10,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 02:34:10,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 02:34:10,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:34:10" (1/1) ... [2022-03-18 02:34:10,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fc85f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:34:10, skipping insertion in model container [2022-03-18 02:34:10,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:34:10" (1/1) ... [2022-03-18 02:34:10,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 02:34:10,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 02:34:10,186 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/egcd-ll_valuebound5.c[489,502] [2022-03-18 02:34:10,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:34:10,234 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 02:34:10,252 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/egcd-ll_valuebound5.c[489,502] [2022-03-18 02:34:10,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:34:10,285 INFO L208 MainTranslator]: Completed translation [2022-03-18 02:34:10,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:34:10 WrapperNode [2022-03-18 02:34:10,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 02:34:10,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 02:34:10,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 02:34:10,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 02:34:10,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:34:10" (1/1) ... [2022-03-18 02:34:10,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:34:10" (1/1) ... [2022-03-18 02:34:10,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:34:10" (1/1) ... [2022-03-18 02:34:10,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:34:10" (1/1) ... [2022-03-18 02:34:10,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:34:10" (1/1) ... [2022-03-18 02:34:10,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:34:10" (1/1) ... [2022-03-18 02:34:10,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:34:10" (1/1) ... [2022-03-18 02:34:10,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 02:34:10,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 02:34:10,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 02:34:10,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 02:34:10,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:34:10" (1/1) ... [2022-03-18 02:34:10,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:34:10,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:10,345 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) [2022-03-18 02:34:10,349 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 [2022-03-18 02:34:10,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 02:34:10,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 02:34:10,374 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 02:34:10,374 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 02:34:10,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 02:34:10,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 02:34:10,375 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 02:34:10,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 02:34:10,375 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 02:34:10,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 02:34:10,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 02:34:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 02:34:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 02:34:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 02:34:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 02:34:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 02:34:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 02:34:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 02:34:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 02:34:10,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 02:34:10,426 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 02:34:10,428 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 02:34:10,537 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 02:34:10,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 02:34:10,541 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 02:34:10,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:34:10 BoogieIcfgContainer [2022-03-18 02:34:10,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 02:34:10,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 02:34:10,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 02:34:10,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 02:34:10,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:34:10" (1/3) ... [2022-03-18 02:34:10,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6385d9a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:34:10, skipping insertion in model container [2022-03-18 02:34:10,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:34:10" (2/3) ... [2022-03-18 02:34:10,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6385d9a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:34:10, skipping insertion in model container [2022-03-18 02:34:10,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:34:10" (3/3) ... [2022-03-18 02:34:10,547 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound5.c [2022-03-18 02:34:10,550 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 02:34:10,550 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 02:34:10,575 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 02:34:10,580 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 [2022-03-18 02:34:10,580 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 02:34:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 02:34:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 02:34:10,594 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:10,595 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:10,595 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:10,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:10,598 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2022-03-18 02:34:10,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:10,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [242074631] [2022-03-18 02:34:10,610 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:10,610 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 2 times [2022-03-18 02:34:10,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:10,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856033125] [2022-03-18 02:34:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:10,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:34:10,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 02:34:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:34:10,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 02:34:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:34:10,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 02:34:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:34:10,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 02:34:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:34:10,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 02:34:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:34:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 02:34:10,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:10,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856033125] [2022-03-18 02:34:10,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856033125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:10,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:10,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:34:10,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:10,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [242074631] [2022-03-18 02:34:10,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [242074631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:10,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:10,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:34:10,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740766554] [2022-03-18 02:34:10,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:10,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 02:34:10,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:10,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 02:34:10,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:34:10,879 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 02:34:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:11,020 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2022-03-18 02:34:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 02:34:11,023 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-18 02:34:11,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:11,035 INFO L225 Difference]: With dead ends: 67 [2022-03-18 02:34:11,035 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 02:34:11,038 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:34:11,040 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:11,041 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:34:11,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 02:34:11,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 02:34:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 02:34:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-18 02:34:11,080 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2022-03-18 02:34:11,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:11,081 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-18 02:34:11,081 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 02:34:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-18 02:34:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 02:34:11,085 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:11,085 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:11,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 02:34:11,086 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:11,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2022-03-18 02:34:11,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:11,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2085263655] [2022-03-18 02:34:11,088 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:11,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 2 times [2022-03-18 02:34:11,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:11,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263509116] [2022-03-18 02:34:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:11,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:11,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:11,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869754799] [2022-03-18 02:34:11,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:11,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:11,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:11,143 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) [2022-03-18 02:34:11,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 02:34:11,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 02:34:11,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:11,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:34:11,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 02:34:11,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:34:11,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:11,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263509116] [2022-03-18 02:34:11,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:11,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869754799] [2022-03-18 02:34:11,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869754799] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:11,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:11,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:34:11,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:11,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2085263655] [2022-03-18 02:34:11,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2085263655] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:11,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:11,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:34:11,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193711148] [2022-03-18 02:34:11,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:11,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:34:11,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:11,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:34:11,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:34:11,387 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 02:34:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:11,474 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-03-18 02:34:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:34:11,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-03-18 02:34:11,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:11,476 INFO L225 Difference]: With dead ends: 48 [2022-03-18 02:34:11,476 INFO L226 Difference]: Without dead ends: 46 [2022-03-18 02:34:11,476 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:34:11,480 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:11,480 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 155 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:34:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-18 02:34:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-18 02:34:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 02:34:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-03-18 02:34:11,491 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2022-03-18 02:34:11,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:11,504 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-03-18 02:34:11,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 02:34:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-03-18 02:34:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 02:34:11,505 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:11,505 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:11,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:11,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:11,722 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:11,723 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2022-03-18 02:34:11,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:11,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1350190916] [2022-03-18 02:34:11,724 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 2 times [2022-03-18 02:34:11,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:11,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78420816] [2022-03-18 02:34:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:11,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:11,760 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:11,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517292390] [2022-03-18 02:34:11,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:11,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:11,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:11,771 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) [2022-03-18 02:34:11,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 02:34:11,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:11,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:11,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:34:11,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 02:34:11,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:34:11,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:11,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78420816] [2022-03-18 02:34:11,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:11,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517292390] [2022-03-18 02:34:11,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517292390] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:11,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:11,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:34:11,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:11,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1350190916] [2022-03-18 02:34:11,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1350190916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:11,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:11,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:34:11,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880141668] [2022-03-18 02:34:11,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:11,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:34:11,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:11,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:34:11,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:34:11,958 INFO L87 Difference]: Start difference. First operand 45 states and 62 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) [2022-03-18 02:34:12,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:12,028 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-03-18 02:34:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:34:12,029 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 [2022-03-18 02:34:12,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:12,032 INFO L225 Difference]: With dead ends: 52 [2022-03-18 02:34:12,033 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 02:34:12,034 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 [2022-03-18 02:34:12,045 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:12,045 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:34:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 02:34:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-18 02:34:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 02:34:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-03-18 02:34:12,056 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 38 [2022-03-18 02:34:12,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:12,057 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-03-18 02:34:12,057 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) [2022-03-18 02:34:12,057 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-03-18 02:34:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 02:34:12,058 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:12,058 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1] [2022-03-18 02:34:12,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:12,290 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 02:34:12,290 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:12,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:12,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2022-03-18 02:34:12,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:12,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1822590389] [2022-03-18 02:34:12,292 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 2 times [2022-03-18 02:34:12,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:12,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47942211] [2022-03-18 02:34:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:12,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:12,308 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:12,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137895016] [2022-03-18 02:34:12,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:12,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:12,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:12,310 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) [2022-03-18 02:34:12,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 02:34:12,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:12,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:12,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:34:12,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:34:12,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:34:12,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:12,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47942211] [2022-03-18 02:34:12,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:12,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137895016] [2022-03-18 02:34:12,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137895016] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:12,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:12,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:34:12,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:12,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1822590389] [2022-03-18 02:34:12,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1822590389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:12,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:12,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:34:12,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694526642] [2022-03-18 02:34:12,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:12,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:34:12,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:34:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:34:12,464 INFO L87 Difference]: Start difference. First operand 49 states and 65 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, (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) [2022-03-18 02:34:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:12,505 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2022-03-18 02:34:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:34:12,506 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, (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 43 [2022-03-18 02:34:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:12,508 INFO L225 Difference]: With dead ends: 74 [2022-03-18 02:34:12,508 INFO L226 Difference]: Without dead ends: 70 [2022-03-18 02:34:12,509 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:34:12,509 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:12,509 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:34:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-18 02:34:12,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-18 02:34:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-18 02:34:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2022-03-18 02:34:12,525 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 43 [2022-03-18 02:34:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:12,525 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2022-03-18 02:34:12,525 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, (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) [2022-03-18 02:34:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2022-03-18 02:34:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 02:34:12,527 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:12,527 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:12,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-18 02:34:12,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:12,741 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:12,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:12,742 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2022-03-18 02:34:12,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:12,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [449676571] [2022-03-18 02:34:12,753 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:12,753 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 2 times [2022-03-18 02:34:12,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:12,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967371792] [2022-03-18 02:34:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:12,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:12,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:12,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979176498] [2022-03-18 02:34:12,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:12,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:12,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:12,779 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) [2022-03-18 02:34:12,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 02:34:12,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:12,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:12,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 02:34:12,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 02:34:12,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:34:12,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:12,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967371792] [2022-03-18 02:34:12,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:12,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979176498] [2022-03-18 02:34:12,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979176498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:12,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:12,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:34:12,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:12,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [449676571] [2022-03-18 02:34:12,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [449676571] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:12,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:12,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:34:12,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985820453] [2022-03-18 02:34:12,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:12,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:34:12,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:12,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:34:12,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:34:12,892 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-18 02:34:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:12,935 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-03-18 02:34:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:34:12,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2022-03-18 02:34:12,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:12,936 INFO L225 Difference]: With dead ends: 76 [2022-03-18 02:34:12,936 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 02:34:12,937 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:34:12,937 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:12,938 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 147 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:34:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 02:34:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-18 02:34:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-18 02:34:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2022-03-18 02:34:12,957 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 49 [2022-03-18 02:34:12,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:12,957 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2022-03-18 02:34:12,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-18 02:34:12,957 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2022-03-18 02:34:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 02:34:12,958 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:12,959 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1] [2022-03-18 02:34:12,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:13,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:13,176 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:13,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 1 times [2022-03-18 02:34:13,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:13,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [505905000] [2022-03-18 02:34:13,177 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:13,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 2 times [2022-03-18 02:34:13,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:13,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891962140] [2022-03-18 02:34:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:13,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:13,186 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:13,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833141885] [2022-03-18 02:34:13,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:13,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:13,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:13,188 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) [2022-03-18 02:34:13,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 02:34:13,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:13,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:13,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 02:34:13,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-18 02:34:13,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:34:13,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:13,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891962140] [2022-03-18 02:34:13,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:13,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833141885] [2022-03-18 02:34:13,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833141885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:13,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:13,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:34:13,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:13,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [505905000] [2022-03-18 02:34:13,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [505905000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:13,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:13,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:34:13,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942933860] [2022-03-18 02:34:13,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:13,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:34:13,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:13,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:34:13,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:34:13,368 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 02:34:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:13,404 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-03-18 02:34:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:34:13,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-03-18 02:34:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:13,406 INFO L225 Difference]: With dead ends: 84 [2022-03-18 02:34:13,406 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 02:34:13,406 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:34:13,406 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:13,406 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:34:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 02:34:13,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-03-18 02:34:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 02:34:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-03-18 02:34:13,414 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2022-03-18 02:34:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:13,414 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-03-18 02:34:13,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 02:34:13,414 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-03-18 02:34:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 02:34:13,415 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:13,415 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-03-18 02:34:13,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:13,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:13,620 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:13,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:13,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2022-03-18 02:34:13,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:13,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [388277110] [2022-03-18 02:34:13,621 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:13,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 2 times [2022-03-18 02:34:13,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:13,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857005618] [2022-03-18 02:34:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:13,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:13,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:13,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481654286] [2022-03-18 02:34:13,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:13,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:13,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:13,633 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) [2022-03-18 02:34:13,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 02:34:13,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:13,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:13,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 02:34:13,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-18 02:34:13,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-18 02:34:13,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:13,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857005618] [2022-03-18 02:34:13,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:13,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481654286] [2022-03-18 02:34:13,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481654286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:13,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:13,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 02:34:13,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:13,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [388277110] [2022-03-18 02:34:13,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [388277110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:13,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:13,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:34:13,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399759722] [2022-03-18 02:34:13,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:13,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:34:13,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:13,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:34:13,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:34:13,936 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 02:34:14,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:14,042 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2022-03-18 02:34:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:34:14,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-03-18 02:34:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:14,044 INFO L225 Difference]: With dead ends: 88 [2022-03-18 02:34:14,044 INFO L226 Difference]: Without dead ends: 84 [2022-03-18 02:34:14,044 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:34:14,045 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:14,045 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 158 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:34:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-18 02:34:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-18 02:34:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-18 02:34:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-03-18 02:34:14,057 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2022-03-18 02:34:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:14,057 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-03-18 02:34:14,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 02:34:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-03-18 02:34:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 02:34:14,058 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:14,059 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-03-18 02:34:14,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:14,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:14,280 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:14,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 3 times [2022-03-18 02:34:14,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:14,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [945661053] [2022-03-18 02:34:14,281 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:14,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 4 times [2022-03-18 02:34:14,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:14,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198075887] [2022-03-18 02:34:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:14,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:14,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:14,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776085122] [2022-03-18 02:34:14,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:34:14,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:14,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:14,303 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) [2022-03-18 02:34:14,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 02:34:14,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:34:14,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:14,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 02:34:14,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-18 02:34:14,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 02:34:14,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:14,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198075887] [2022-03-18 02:34:14,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:14,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776085122] [2022-03-18 02:34:14,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776085122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:14,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:14,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-18 02:34:14,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:14,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [945661053] [2022-03-18 02:34:14,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [945661053] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:14,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:14,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:34:14,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209769008] [2022-03-18 02:34:14,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:14,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:34:14,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:14,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:34:14,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:34:14,820 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 02:34:14,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:14,944 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-03-18 02:34:14,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:34:14,945 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-03-18 02:34:14,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:14,946 INFO L225 Difference]: With dead ends: 118 [2022-03-18 02:34:14,946 INFO L226 Difference]: Without dead ends: 116 [2022-03-18 02:34:14,946 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:34:14,947 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:14,947 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 224 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:34:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-18 02:34:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-03-18 02:34:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-18 02:34:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-03-18 02:34:14,959 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2022-03-18 02:34:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:14,959 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-03-18 02:34:14,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 02:34:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-03-18 02:34:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 02:34:14,960 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:14,960 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2022-03-18 02:34:14,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:15,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:15,176 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:15,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:15,176 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 1 times [2022-03-18 02:34:15,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:15,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [742029287] [2022-03-18 02:34:15,177 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:15,177 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2022-03-18 02:34:15,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:15,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976631016] [2022-03-18 02:34:15,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:15,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:15,189 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:15,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845580627] [2022-03-18 02:34:15,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:15,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:15,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:15,201 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) [2022-03-18 02:34:15,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 02:34:15,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:15,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:15,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 02:34:15,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 02:34:15,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 02:34:15,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:15,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976631016] [2022-03-18 02:34:15,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:15,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845580627] [2022-03-18 02:34:15,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845580627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:15,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:15,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-18 02:34:15,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:15,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [742029287] [2022-03-18 02:34:15,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [742029287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:15,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:15,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:34:15,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780569945] [2022-03-18 02:34:15,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:15,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:34:15,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:15,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:34:15,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:34:15,581 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 02:34:15,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:15,650 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2022-03-18 02:34:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:34:15,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 61 [2022-03-18 02:34:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:15,651 INFO L225 Difference]: With dead ends: 137 [2022-03-18 02:34:15,651 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 02:34:15,652 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:34:15,652 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:15,652 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 198 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:34:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 02:34:15,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-18 02:34:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-18 02:34:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-03-18 02:34:15,664 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2022-03-18 02:34:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:15,665 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-03-18 02:34:15,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 02:34:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-03-18 02:34:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 02:34:15,665 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:15,666 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1] [2022-03-18 02:34:15,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 02:34:15,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 02:34:15,883 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:15,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:15,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2022-03-18 02:34:15,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:15,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282637339] [2022-03-18 02:34:15,884 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:15,884 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 2 times [2022-03-18 02:34:15,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:15,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326935793] [2022-03-18 02:34:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:15,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:15,907 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:15,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813139433] [2022-03-18 02:34:15,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:15,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:15,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:15,917 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) [2022-03-18 02:34:15,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 02:34:15,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:15,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:15,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 02:34:15,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 02:34:16,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-18 02:34:16,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:16,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326935793] [2022-03-18 02:34:16,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:16,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813139433] [2022-03-18 02:34:16,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813139433] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 02:34:16,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:34:16,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-18 02:34:16,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:16,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282637339] [2022-03-18 02:34:16,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282637339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:16,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:16,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:34:16,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245859913] [2022-03-18 02:34:16,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:16,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:34:16,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:16,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:34:16,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:34:16,325 INFO L87 Difference]: Start difference. First operand 131 states and 167 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 02:34:16,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:16,362 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2022-03-18 02:34:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:34:16,362 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2022-03-18 02:34:16,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:16,364 INFO L225 Difference]: With dead ends: 137 [2022-03-18 02:34:16,364 INFO L226 Difference]: Without dead ends: 132 [2022-03-18 02:34:16,365 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:34:16,366 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:16,367 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:34:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-18 02:34:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-03-18 02:34:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-18 02:34:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2022-03-18 02:34:16,387 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 69 [2022-03-18 02:34:16,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:16,388 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2022-03-18 02:34:16,388 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 02:34:16,388 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2022-03-18 02:34:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 02:34:16,391 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:16,391 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-03-18 02:34:16,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:16,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 02:34:16,599 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:16,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 5 times [2022-03-18 02:34:16,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:16,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1010814203] [2022-03-18 02:34:16,600 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:16,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 6 times [2022-03-18 02:34:16,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:16,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294881009] [2022-03-18 02:34:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:16,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:16,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:16,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165690617] [2022-03-18 02:34:16,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:34:16,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:16,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:16,618 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) [2022-03-18 02:34:16,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 02:34:16,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:34:16,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:16,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 02:34:16,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-18 02:34:17,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:18,042 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:34:26,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:26,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294881009] [2022-03-18 02:34:26,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:26,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165690617] [2022-03-18 02:34:26,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165690617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:34:26,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:34:26,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-18 02:34:26,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:26,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1010814203] [2022-03-18 02:34:26,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1010814203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:26,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:26,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 02:34:26,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210087532] [2022-03-18 02:34:26,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:26,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 02:34:26,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:26,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 02:34:26,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=382, Unknown=2, NotChecked=0, Total=462 [2022-03-18 02:34:26,573 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-18 02:34:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:27,243 INFO L93 Difference]: Finished difference Result 162 states and 204 transitions. [2022-03-18 02:34:27,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:34:27,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 74 [2022-03-18 02:34:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:27,245 INFO L225 Difference]: With dead ends: 162 [2022-03-18 02:34:27,245 INFO L226 Difference]: Without dead ends: 160 [2022-03-18 02:34:27,246 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=96, Invalid=502, Unknown=2, NotChecked=0, Total=600 [2022-03-18 02:34:27,246 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 31 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:27,247 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 292 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 422 Invalid, 0 Unknown, 67 Unchecked, 0.6s Time] [2022-03-18 02:34:27,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-18 02:34:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 142. [2022-03-18 02:34:27,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 85 states have internal predecessors, (95), 42 states have call successors, (42), 18 states have call predecessors, (42), 17 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-18 02:34:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 177 transitions. [2022-03-18 02:34:27,265 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 177 transitions. Word has length 74 [2022-03-18 02:34:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:27,265 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 177 transitions. [2022-03-18 02:34:27,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-18 02:34:27,265 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 177 transitions. [2022-03-18 02:34:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 02:34:27,266 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:27,266 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-03-18 02:34:27,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:27,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 02:34:27,480 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:27,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2022-03-18 02:34:27,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:27,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1300659172] [2022-03-18 02:34:27,481 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:27,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 4 times [2022-03-18 02:34:27,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:27,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155048862] [2022-03-18 02:34:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:27,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:27,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:27,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324422784] [2022-03-18 02:34:27,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:34:27,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:27,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:27,512 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) [2022-03-18 02:34:27,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 02:34:27,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:34:27,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:27,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 02:34:27,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-18 02:34:28,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-18 02:34:28,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:28,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155048862] [2022-03-18 02:34:28,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:28,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324422784] [2022-03-18 02:34:28,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324422784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:28,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:28,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-03-18 02:34:28,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:28,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1300659172] [2022-03-18 02:34:28,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1300659172] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:28,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:28,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:34:28,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304723438] [2022-03-18 02:34:28,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:28,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:34:28,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:28,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:34:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:34:28,540 INFO L87 Difference]: Start difference. First operand 142 states and 177 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 02:34:28,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:28,915 INFO L93 Difference]: Finished difference Result 180 states and 222 transitions. [2022-03-18 02:34:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 02:34:28,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2022-03-18 02:34:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:28,917 INFO L225 Difference]: With dead ends: 180 [2022-03-18 02:34:28,917 INFO L226 Difference]: Without dead ends: 178 [2022-03-18 02:34:28,917 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:34:28,918 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 26 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:28,918 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 209 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:34:28,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-18 02:34:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2022-03-18 02:34:28,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 100 states have internal predecessors, (111), 45 states have call successors, (45), 22 states have call predecessors, (45), 21 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 02:34:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 199 transitions. [2022-03-18 02:34:28,936 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 199 transitions. Word has length 74 [2022-03-18 02:34:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:28,936 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 199 transitions. [2022-03-18 02:34:28,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 02:34:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 199 transitions. [2022-03-18 02:34:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 02:34:28,937 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:28,937 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:28,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:29,169 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 02:34:29,170 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:29,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:29,170 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 5 times [2022-03-18 02:34:29,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:29,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [812266211] [2022-03-18 02:34:29,171 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:29,171 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 6 times [2022-03-18 02:34:29,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:29,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122725663] [2022-03-18 02:34:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:29,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:29,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:29,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815111360] [2022-03-18 02:34:29,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:34:29,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:29,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:29,192 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) [2022-03-18 02:34:29,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 02:34:29,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:34:29,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:29,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 02:34:29,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-18 02:34:29,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-03-18 02:34:29,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:29,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122725663] [2022-03-18 02:34:29,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:29,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815111360] [2022-03-18 02:34:29,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815111360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:29,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:29,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-18 02:34:29,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:29,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [812266211] [2022-03-18 02:34:29,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [812266211] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:29,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:29,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:34:29,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210613927] [2022-03-18 02:34:29,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:29,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:34:29,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:29,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:34:29,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:34:29,596 INFO L87 Difference]: Start difference. First operand 164 states and 199 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 02:34:29,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:29,790 INFO L93 Difference]: Finished difference Result 178 states and 218 transitions. [2022-03-18 02:34:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:34:29,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2022-03-18 02:34:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:29,792 INFO L225 Difference]: With dead ends: 178 [2022-03-18 02:34:29,792 INFO L226 Difference]: Without dead ends: 165 [2022-03-18 02:34:29,792 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:34:29,794 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:29,795 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 180 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:34:29,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-18 02:34:29,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 145. [2022-03-18 02:34:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 92 states have internal predecessors, (96), 36 states have call successors, (36), 21 states have call predecessors, (36), 20 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-18 02:34:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2022-03-18 02:34:29,813 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 79 [2022-03-18 02:34:29,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:29,814 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2022-03-18 02:34:29,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 02:34:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2022-03-18 02:34:29,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 02:34:29,814 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:29,814 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2022-03-18 02:34:29,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:30,032 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 02:34:30,032 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:30,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:30,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2022-03-18 02:34:30,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:30,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1076777791] [2022-03-18 02:34:30,033 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:30,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 4 times [2022-03-18 02:34:30,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:30,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746690032] [2022-03-18 02:34:30,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:30,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:30,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:30,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992370708] [2022-03-18 02:34:30,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:34:30,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:30,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:30,068 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) [2022-03-18 02:34:30,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 02:34:30,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:34:30,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:30,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 02:34:30,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 38 proven. 37 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-18 02:34:30,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-18 02:34:30,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:30,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746690032] [2022-03-18 02:34:30,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:30,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992370708] [2022-03-18 02:34:30,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992370708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:30,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:30,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-18 02:34:30,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:30,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1076777791] [2022-03-18 02:34:30,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1076777791] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:30,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:30,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:34:30,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002674427] [2022-03-18 02:34:30,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:30,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:34:30,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:30,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:34:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:34:30,839 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:34:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:31,141 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2022-03-18 02:34:31,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:34:31,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2022-03-18 02:34:31,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:31,144 INFO L225 Difference]: With dead ends: 167 [2022-03-18 02:34:31,144 INFO L226 Difference]: Without dead ends: 165 [2022-03-18 02:34:31,144 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:34:31,144 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:31,144 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 163 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:34:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-18 02:34:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2022-03-18 02:34:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 98 states have internal predecessors, (103), 39 states have call successors, (39), 22 states have call predecessors, (39), 21 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-18 02:34:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 180 transitions. [2022-03-18 02:34:31,162 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 180 transitions. Word has length 79 [2022-03-18 02:34:31,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:31,162 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 180 transitions. [2022-03-18 02:34:31,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:34:31,162 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 180 transitions. [2022-03-18 02:34:31,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-18 02:34:31,163 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:31,163 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:31,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:31,381 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 02:34:31,381 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:31,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 7 times [2022-03-18 02:34:31,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:31,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [866350068] [2022-03-18 02:34:31,382 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:31,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 8 times [2022-03-18 02:34:31,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:31,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785068656] [2022-03-18 02:34:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:31,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:31,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:31,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512580412] [2022-03-18 02:34:31,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:31,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:31,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:31,394 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) [2022-03-18 02:34:31,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 02:34:31,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:31,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:31,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-18 02:34:31,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 63 proven. 44 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-18 02:34:33,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-18 02:34:34,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785068656] [2022-03-18 02:34:34,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:34,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512580412] [2022-03-18 02:34:34,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512580412] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:34,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:34,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 21 [2022-03-18 02:34:34,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:34,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [866350068] [2022-03-18 02:34:34,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [866350068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:34,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:34,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:34:34,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614869643] [2022-03-18 02:34:34,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:34,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:34:34,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:34:34,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:34:34,156 INFO L87 Difference]: Start difference. First operand 155 states and 180 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-18 02:34:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:36,274 INFO L93 Difference]: Finished difference Result 183 states and 217 transitions. [2022-03-18 02:34:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 02:34:36,275 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 92 [2022-03-18 02:34:36,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:36,276 INFO L225 Difference]: With dead ends: 183 [2022-03-18 02:34:36,276 INFO L226 Difference]: Without dead ends: 181 [2022-03-18 02:34:36,277 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:34:36,277 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:36,277 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 256 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 430 Invalid, 0 Unknown, 5 Unchecked, 2.0s Time] [2022-03-18 02:34:36,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-18 02:34:36,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2022-03-18 02:34:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 107 states have (on average 1.102803738317757) internal successors, (118), 112 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (47), 42 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-18 02:34:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 213 transitions. [2022-03-18 02:34:36,314 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 213 transitions. Word has length 92 [2022-03-18 02:34:36,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:36,314 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 213 transitions. [2022-03-18 02:34:36,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-18 02:34:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 213 transitions. [2022-03-18 02:34:36,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-18 02:34:36,315 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:36,315 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:36,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:36,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:36,516 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:36,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:36,517 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 9 times [2022-03-18 02:34:36,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:36,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [161874912] [2022-03-18 02:34:36,517 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:36,517 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 10 times [2022-03-18 02:34:36,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:36,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708035209] [2022-03-18 02:34:36,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:36,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:36,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:36,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424576569] [2022-03-18 02:34:36,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:34:36,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:36,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:36,533 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) [2022-03-18 02:34:36,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 02:34:36,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:34:36,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:36,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 02:34:36,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-03-18 02:34:37,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:39,515 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:34:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-03-18 02:34:39,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:39,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708035209] [2022-03-18 02:34:39,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:39,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424576569] [2022-03-18 02:34:39,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424576569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:39,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:39,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-18 02:34:39,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:39,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [161874912] [2022-03-18 02:34:39,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [161874912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:39,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:39,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:34:39,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156931185] [2022-03-18 02:34:39,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:39,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:34:39,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:39,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:34:39,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:34:39,590 INFO L87 Difference]: Start difference. First operand 179 states and 213 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 02:34:40,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:40,135 INFO L93 Difference]: Finished difference Result 208 states and 249 transitions. [2022-03-18 02:34:40,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:34:40,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2022-03-18 02:34:40,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:40,138 INFO L225 Difference]: With dead ends: 208 [2022-03-18 02:34:40,138 INFO L226 Difference]: Without dead ends: 206 [2022-03-18 02:34:40,138 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:34:40,139 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:40,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 326 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:34:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-18 02:34:40,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2022-03-18 02:34:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 122 states have internal predecessors, (131), 52 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-18 02:34:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 234 transitions. [2022-03-18 02:34:40,189 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 234 transitions. Word has length 92 [2022-03-18 02:34:40,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:40,189 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 234 transitions. [2022-03-18 02:34:40,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 02:34:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 234 transitions. [2022-03-18 02:34:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-18 02:34:40,190 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:40,190 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:40,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:40,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 02:34:40,408 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 11 times [2022-03-18 02:34:40,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:40,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [273428886] [2022-03-18 02:34:40,408 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 12 times [2022-03-18 02:34:40,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:40,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907516034] [2022-03-18 02:34:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:40,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:40,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:40,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116944466] [2022-03-18 02:34:40,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:34:40,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:40,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:40,417 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) [2022-03-18 02:34:40,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 02:34:40,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:34:40,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:40,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 02:34:40,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:40,757 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:34:40,759 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:34:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 02:34:45,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:45,490 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:34:57,447 WARN L232 SmtUtils]: Spent 5.58s on a formula simplification that was a NOOP. DAG size: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-18 02:36:11,910 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~p~0_BEFORE_CALL_129 Int) (v_main_~s~0_BEFORE_CALL_125 Int) (v_main_~q~0_BEFORE_CALL_125 Int) (v_main_~r~0_BEFORE_CALL_126 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_125) v_main_~r~0_BEFORE_CALL_126) v_main_~q~0_BEFORE_CALL_125) 1) (* (+ v_main_~p~0_BEFORE_CALL_129 (* (- 1) v_main_~q~0_BEFORE_CALL_125)) v_main_~s~0_BEFORE_CALL_125))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_126 v_main_~q~0_BEFORE_CALL_125) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_129) 0)))))) is different from true [2022-03-18 02:37:13,731 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~p~0_BEFORE_CALL_129 Int) (v_main_~s~0_BEFORE_CALL_125 Int) (v_main_~q~0_BEFORE_CALL_125 Int) (v_main_~r~0_BEFORE_CALL_126 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_125) v_main_~r~0_BEFORE_CALL_126) v_main_~q~0_BEFORE_CALL_125) 1) (* (+ v_main_~p~0_BEFORE_CALL_129 (* (- 1) v_main_~q~0_BEFORE_CALL_125)) v_main_~s~0_BEFORE_CALL_125))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_126 v_main_~q~0_BEFORE_CALL_125) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_129) 0)))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-18 02:37:31,792 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~p~0_BEFORE_CALL_129 Int) (v_main_~s~0_BEFORE_CALL_125 Int) (v_main_~q~0_BEFORE_CALL_125 Int) (v_main_~r~0_BEFORE_CALL_126 Int)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_126 v_main_~q~0_BEFORE_CALL_125) 1))) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_125) v_main_~r~0_BEFORE_CALL_126) v_main_~q~0_BEFORE_CALL_125) 1) (* (+ v_main_~p~0_BEFORE_CALL_129 (* (- 1) v_main_~q~0_BEFORE_CALL_125)) v_main_~s~0_BEFORE_CALL_125))) (= .cse0 0) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_129) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-03-18 02:37:40,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:37:40,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907516034] [2022-03-18 02:37:40,068 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:37:40,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116944466] [2022-03-18 02:37:40,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116944466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:37:40,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:37:40,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 02:37:40,068 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:37:40,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [273428886] [2022-03-18 02:37:40,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [273428886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:37:40,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:37:40,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:37:40,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545737590] [2022-03-18 02:37:40,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:37:40,069 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:37:40,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:40,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:37:40,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=189, Unknown=8, NotChecked=90, Total=342 [2022-03-18 02:37:40,070 INFO L87 Difference]: Start difference. First operand 196 states and 234 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 02:37:42,211 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 [] [2022-03-18 02:37:44,221 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 [] [2022-03-18 02:38:16,938 WARN L232 SmtUtils]: Spent 32.67s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:38:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:38:17,402 INFO L93 Difference]: Finished difference Result 224 states and 272 transitions. [2022-03-18 02:38:17,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:38:17,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2022-03-18 02:38:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:38:17,404 INFO L225 Difference]: With dead ends: 224 [2022-03-18 02:38:17,404 INFO L226 Difference]: Without dead ends: 222 [2022-03-18 02:38:17,404 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=76, Invalid=270, Unknown=8, NotChecked=108, Total=462 [2022-03-18 02:38:17,405 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:38:17,405 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 198 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 171 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-03-18 02:38:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-18 02:38:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2022-03-18 02:38:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 131 states have (on average 1.1145038167938932) internal successors, (146), 136 states have internal predecessors, (146), 61 states have call successors, (61), 28 states have call predecessors, (61), 27 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2022-03-18 02:38:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 267 transitions. [2022-03-18 02:38:17,444 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 267 transitions. Word has length 92 [2022-03-18 02:38:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:38:17,444 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 267 transitions. [2022-03-18 02:38:17,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 02:38:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 267 transitions. [2022-03-18 02:38:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 02:38:17,445 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:38:17,445 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:38:17,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 02:38:17,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 02:38:17,660 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:38:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:38:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 13 times [2022-03-18 02:38:17,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:17,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [753520001] [2022-03-18 02:38:17,660 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:38:17,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 14 times [2022-03-18 02:38:17,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:38:17,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143611810] [2022-03-18 02:38:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:38:17,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:38:17,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:38:17,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908362348] [2022-03-18 02:38:17,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:38:17,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:17,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:38:17,667 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:38:17,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 02:38:17,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:38:17,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:38:17,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 02:38:17,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:38:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 71 proven. 35 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-18 02:38:18,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:38:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-18 02:38:18,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:38:18,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143611810] [2022-03-18 02:38:18,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:38:18,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908362348] [2022-03-18 02:38:18,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908362348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:38:18,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:38:18,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-18 02:38:18,513 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:38:18,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [753520001] [2022-03-18 02:38:18,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [753520001] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:38:18,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:38:18,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:38:18,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991714905] [2022-03-18 02:38:18,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:38:18,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:38:18,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:18,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:38:18,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:38:18,515 INFO L87 Difference]: Start difference. First operand 220 states and 267 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-18 02:38:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:38:19,040 INFO L93 Difference]: Finished difference Result 258 states and 307 transitions. [2022-03-18 02:38:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:38:19,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2022-03-18 02:38:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:38:19,042 INFO L225 Difference]: With dead ends: 258 [2022-03-18 02:38:19,042 INFO L226 Difference]: Without dead ends: 256 [2022-03-18 02:38:19,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:38:19,043 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 17 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:38:19,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 279 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:38:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-18 02:38:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 242. [2022-03-18 02:38:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 147 states have (on average 1.1020408163265305) internal successors, (162), 153 states have internal predecessors, (162), 62 states have call successors, (62), 33 states have call predecessors, (62), 32 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-18 02:38:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 285 transitions. [2022-03-18 02:38:19,096 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 285 transitions. Word has length 97 [2022-03-18 02:38:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:38:19,096 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 285 transitions. [2022-03-18 02:38:19,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-18 02:38:19,097 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 285 transitions. [2022-03-18 02:38:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 02:38:19,098 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:38:19,098 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:38:19,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 02:38:19,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 02:38:19,301 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:38:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:38:19,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 15 times [2022-03-18 02:38:19,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:19,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1134664035] [2022-03-18 02:38:19,302 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:38:19,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 16 times [2022-03-18 02:38:19,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:38:19,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781377723] [2022-03-18 02:38:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:38:19,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:38:19,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:38:19,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274864263] [2022-03-18 02:38:19,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:38:19,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:19,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:38:19,317 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:38:19,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 02:38:19,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:38:19,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:38:19,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 02:38:19,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:38:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 77 proven. 41 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-03-18 02:38:21,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:38:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-18 02:38:21,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:38:21,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781377723] [2022-03-18 02:38:21,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:38:21,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274864263] [2022-03-18 02:38:21,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274864263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:38:21,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:38:21,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 23 [2022-03-18 02:38:21,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:38:21,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1134664035] [2022-03-18 02:38:21,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1134664035] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:38:21,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:38:21,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 02:38:21,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165336173] [2022-03-18 02:38:21,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:38:21,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 02:38:21,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:21,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 02:38:21,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-03-18 02:38:21,368 INFO L87 Difference]: Start difference. First operand 242 states and 285 transitions. Second operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:38:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:38:21,959 INFO L93 Difference]: Finished difference Result 297 states and 347 transitions. [2022-03-18 02:38:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 02:38:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) Word has length 97 [2022-03-18 02:38:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:38:21,960 INFO L225 Difference]: With dead ends: 297 [2022-03-18 02:38:21,960 INFO L226 Difference]: Without dead ends: 242 [2022-03-18 02:38:21,963 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-18 02:38:21,963 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:38:21,963 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 301 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:38:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-18 02:38:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-03-18 02:38:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 147 states have (on average 1.0952380952380953) internal successors, (161), 153 states have internal predecessors, (161), 62 states have call successors, (62), 33 states have call predecessors, (62), 32 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-18 02:38:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 284 transitions. [2022-03-18 02:38:22,002 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 284 transitions. Word has length 97 [2022-03-18 02:38:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:38:22,003 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 284 transitions. [2022-03-18 02:38:22,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:38:22,003 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 284 transitions. [2022-03-18 02:38:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 02:38:22,003 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:38:22,004 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:38:22,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 02:38:22,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:22,221 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:38:22,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:38:22,222 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 5 times [2022-03-18 02:38:22,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:22,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2142581895] [2022-03-18 02:38:22,222 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:38:22,222 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 6 times [2022-03-18 02:38:22,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:38:22,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642019111] [2022-03-18 02:38:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:38:22,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:38:22,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:38:22,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663532387] [2022-03-18 02:38:22,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:38:22,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:22,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:38:22,246 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:38:22,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 02:38:22,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:38:22,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:38:22,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 02:38:22,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:38:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 104 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-18 02:38:22,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:38:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 107 proven. 3 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-18 02:38:22,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:38:22,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642019111] [2022-03-18 02:38:22,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:38:22,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663532387] [2022-03-18 02:38:22,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663532387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:38:22,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:38:22,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-18 02:38:22,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:38:22,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2142581895] [2022-03-18 02:38:22,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2142581895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:38:22,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:38:22,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:38:22,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135100202] [2022-03-18 02:38:22,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:38:22,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:38:22,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:22,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:38:22,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:38:22,936 INFO L87 Difference]: Start difference. First operand 242 states and 284 transitions. Second operand has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:38:23,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:38:23,196 INFO L93 Difference]: Finished difference Result 261 states and 307 transitions. [2022-03-18 02:38:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:38:23,197 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-03-18 02:38:23,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:38:23,198 INFO L225 Difference]: With dead ends: 261 [2022-03-18 02:38:23,199 INFO L226 Difference]: Without dead ends: 259 [2022-03-18 02:38:23,199 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:38:23,201 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:38:23,202 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 137 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:38:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-18 02:38:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 226. [2022-03-18 02:38:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 139 states have (on average 1.0935251798561152) internal successors, (152), 143 states have internal predecessors, (152), 55 states have call successors, (55), 32 states have call predecessors, (55), 31 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-18 02:38:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 261 transitions. [2022-03-18 02:38:23,267 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 261 transitions. Word has length 97 [2022-03-18 02:38:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:38:23,267 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 261 transitions. [2022-03-18 02:38:23,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:38:23,268 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 261 transitions. [2022-03-18 02:38:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 02:38:23,269 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:38:23,269 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:38:23,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 02:38:23,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:23,491 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:38:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:38:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 17 times [2022-03-18 02:38:23,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:23,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [690272824] [2022-03-18 02:38:23,492 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:38:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 18 times [2022-03-18 02:38:23,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:38:23,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286240210] [2022-03-18 02:38:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:38:23,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:38:23,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:38:23,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888561796] [2022-03-18 02:38:23,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:38:23,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:23,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:38:23,515 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:38:23,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 02:38:23,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:38:23,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:38:23,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 02:38:23,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:38:36,441 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:38:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 91 proven. 53 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-03-18 02:38:36,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:38:45,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:38:45,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286240210] [2022-03-18 02:38:45,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:38:45,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888561796] [2022-03-18 02:38:45,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888561796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:38:45,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:38:45,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 02:38:45,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:38:45,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [690272824] [2022-03-18 02:38:45,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [690272824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:38:45,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:38:45,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:38:45,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119484723] [2022-03-18 02:38:45,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:38:45,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:38:45,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:45,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:38:45,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=425, Unknown=2, NotChecked=0, Total=506 [2022-03-18 02:38:45,706 INFO L87 Difference]: Start difference. First operand 226 states and 261 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 02:38:57,004 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 [] [2022-03-18 02:39:00,360 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:39:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:01,953 INFO L93 Difference]: Finished difference Result 271 states and 316 transitions. [2022-03-18 02:39:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 02:39:01,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 110 [2022-03-18 02:39:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:01,957 INFO L225 Difference]: With dead ends: 271 [2022-03-18 02:39:01,957 INFO L226 Difference]: Without dead ends: 269 [2022-03-18 02:39:01,958 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=105, Invalid=595, Unknown=2, NotChecked=0, Total=702 [2022-03-18 02:39:01,958 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:01,958 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 246 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 465 Invalid, 1 Unknown, 0 Unchecked, 10.9s Time] [2022-03-18 02:39:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-18 02:39:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 237. [2022-03-18 02:39:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 147 states have (on average 1.0952380952380953) internal successors, (161), 150 states have internal predecessors, (161), 56 states have call successors, (56), 34 states have call predecessors, (56), 33 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 02:39:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 272 transitions. [2022-03-18 02:39:02,008 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 272 transitions. Word has length 110 [2022-03-18 02:39:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:02,008 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 272 transitions. [2022-03-18 02:39:02,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 02:39:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 272 transitions. [2022-03-18 02:39:02,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 02:39:02,009 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:02,009 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:02,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:02,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-18 02:39:02,214 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:02,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:02,215 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 19 times [2022-03-18 02:39:02,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:02,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [584510433] [2022-03-18 02:39:02,215 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:02,215 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 20 times [2022-03-18 02:39:02,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:02,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718033209] [2022-03-18 02:39:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:02,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:02,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:02,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102845450] [2022-03-18 02:39:02,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:02,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:02,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:02,233 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:39:02,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 02:39:02,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:02,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:02,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 02:39:02,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-03-18 02:39:02,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 38 proven. 45 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-03-18 02:39:02,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:02,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718033209] [2022-03-18 02:39:02,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:02,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102845450] [2022-03-18 02:39:02,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102845450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:02,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:02,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-18 02:39:02,844 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:02,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [584510433] [2022-03-18 02:39:02,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [584510433] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:02,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:02,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:39:02,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034870736] [2022-03-18 02:39:02,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:02,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:39:02,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:02,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:39:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:39:02,846 INFO L87 Difference]: Start difference. First operand 237 states and 272 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:39:03,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:03,104 INFO L93 Difference]: Finished difference Result 319 states and 393 transitions. [2022-03-18 02:39:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:39:03,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2022-03-18 02:39:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:03,108 INFO L225 Difference]: With dead ends: 319 [2022-03-18 02:39:03,108 INFO L226 Difference]: Without dead ends: 291 [2022-03-18 02:39:03,108 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:39:03,109 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:03,109 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 234 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:39:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-18 02:39:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-03-18 02:39:03,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 174 states have (on average 1.1206896551724137) internal successors, (195), 177 states have internal predecessors, (195), 83 states have call successors, (83), 34 states have call predecessors, (83), 33 states have return successors, (82), 79 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-18 02:39:03,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 360 transitions. [2022-03-18 02:39:03,234 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 360 transitions. Word has length 110 [2022-03-18 02:39:03,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:03,234 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 360 transitions. [2022-03-18 02:39:03,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:39:03,234 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 360 transitions. [2022-03-18 02:39:03,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 02:39:03,235 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:03,235 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:03,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:03,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-18 02:39:03,450 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:03,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 21 times [2022-03-18 02:39:03,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:03,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [845319683] [2022-03-18 02:39:03,451 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:03,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 22 times [2022-03-18 02:39:03,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:03,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848576343] [2022-03-18 02:39:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:03,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:03,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:03,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579131724] [2022-03-18 02:39:03,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:39:03,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:03,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:03,459 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:39:03,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 02:39:03,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:39:03,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:03,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 02:39:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 90 proven. 39 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-03-18 02:39:03,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 38 proven. 45 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-03-18 02:39:04,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:04,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848576343] [2022-03-18 02:39:04,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:04,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579131724] [2022-03-18 02:39:04,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579131724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:04,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:04,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-18 02:39:04,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:04,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [845319683] [2022-03-18 02:39:04,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [845319683] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:04,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:04,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:39:04,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339560914] [2022-03-18 02:39:04,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:04,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:39:04,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:04,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:39:04,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:39:04,035 INFO L87 Difference]: Start difference. First operand 291 states and 360 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:39:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:04,293 INFO L93 Difference]: Finished difference Result 355 states and 450 transitions. [2022-03-18 02:39:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:39:04,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2022-03-18 02:39:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:04,306 INFO L225 Difference]: With dead ends: 355 [2022-03-18 02:39:04,306 INFO L226 Difference]: Without dead ends: 287 [2022-03-18 02:39:04,306 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-03-18 02:39:04,307 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:04,307 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 302 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:39:04,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-18 02:39:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2022-03-18 02:39:04,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 169 states have (on average 1.106508875739645) internal successors, (187), 173 states have internal predecessors, (187), 83 states have call successors, (83), 33 states have call predecessors, (83), 32 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-18 02:39:04,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 352 transitions. [2022-03-18 02:39:04,430 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 352 transitions. Word has length 110 [2022-03-18 02:39:04,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:04,430 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 352 transitions. [2022-03-18 02:39:04,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:39:04,430 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 352 transitions. [2022-03-18 02:39:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 02:39:04,431 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:04,431 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:04,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:04,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:04,651 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:04,652 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 23 times [2022-03-18 02:39:04,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:04,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2040282366] [2022-03-18 02:39:04,652 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:04,652 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 24 times [2022-03-18 02:39:04,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:04,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885948553] [2022-03-18 02:39:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:04,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:04,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:04,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713119994] [2022-03-18 02:39:04,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:39:04,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:04,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:04,680 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:39:04,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 02:39:05,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:39:05,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:05,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-18 02:39:05,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 115 proven. 48 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-18 02:39:07,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:08,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:08,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885948553] [2022-03-18 02:39:08,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:08,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713119994] [2022-03-18 02:39:08,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713119994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:39:08,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:39:08,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-18 02:39:08,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:08,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2040282366] [2022-03-18 02:39:08,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2040282366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:08,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:08,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 02:39:08,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549378258] [2022-03-18 02:39:08,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:08,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 02:39:08,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:08,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 02:39:08,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-03-18 02:39:08,359 INFO L87 Difference]: Start difference. First operand 285 states and 352 transitions. Second operand has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-03-18 02:39:10,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:10,011 INFO L93 Difference]: Finished difference Result 321 states and 396 transitions. [2022-03-18 02:39:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 02:39:10,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 110 [2022-03-18 02:39:10,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:10,015 INFO L225 Difference]: With dead ends: 321 [2022-03-18 02:39:10,016 INFO L226 Difference]: Without dead ends: 319 [2022-03-18 02:39:10,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-03-18 02:39:10,017 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:10,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 192 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 261 Invalid, 0 Unknown, 38 Unchecked, 0.9s Time] [2022-03-18 02:39:10,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-03-18 02:39:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 299. [2022-03-18 02:39:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 178 states have (on average 1.1067415730337078) internal successors, (197), 182 states have internal predecessors, (197), 86 states have call successors, (86), 35 states have call predecessors, (86), 34 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-18 02:39:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 368 transitions. [2022-03-18 02:39:10,153 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 368 transitions. Word has length 110 [2022-03-18 02:39:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:10,156 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 368 transitions. [2022-03-18 02:39:10,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-03-18 02:39:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 368 transitions. [2022-03-18 02:39:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 02:39:10,157 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:10,157 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:10,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:10,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:10,363 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 25 times [2022-03-18 02:39:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1585976731] [2022-03-18 02:39:10,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:10,365 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 26 times [2022-03-18 02:39:10,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:10,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428638925] [2022-03-18 02:39:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:10,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:10,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:10,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100035792] [2022-03-18 02:39:10,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:10,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:10,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:10,391 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:39:10,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 02:39:10,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:10,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:10,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 02:39:10,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 98 proven. 31 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-03-18 02:39:10,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 41 proven. 42 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-03-18 02:39:11,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:11,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428638925] [2022-03-18 02:39:11,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:11,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100035792] [2022-03-18 02:39:11,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100035792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:11,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:11,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-18 02:39:11,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:11,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1585976731] [2022-03-18 02:39:11,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1585976731] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:11,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:11,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:39:11,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139354615] [2022-03-18 02:39:11,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:11,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:39:11,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:39:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:39:11,022 INFO L87 Difference]: Start difference. First operand 299 states and 368 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:39:11,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:11,364 INFO L93 Difference]: Finished difference Result 453 states and 601 transitions. [2022-03-18 02:39:11,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:39:11,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2022-03-18 02:39:11,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:11,375 INFO L225 Difference]: With dead ends: 453 [2022-03-18 02:39:11,375 INFO L226 Difference]: Without dead ends: 415 [2022-03-18 02:39:11,375 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-03-18 02:39:11,376 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 17 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:11,376 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 303 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:39:11,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-03-18 02:39:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 365. [2022-03-18 02:39:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 211 states have (on average 1.1374407582938388) internal successors, (240), 215 states have internal predecessors, (240), 119 states have call successors, (119), 35 states have call predecessors, (119), 34 states have return successors, (118), 114 states have call predecessors, (118), 118 states have call successors, (118) [2022-03-18 02:39:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 477 transitions. [2022-03-18 02:39:11,502 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 477 transitions. Word has length 110 [2022-03-18 02:39:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:11,502 INFO L478 AbstractCegarLoop]: Abstraction has 365 states and 477 transitions. [2022-03-18 02:39:11,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:39:11,502 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 477 transitions. [2022-03-18 02:39:11,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 02:39:11,503 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:11,503 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:11,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:11,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-18 02:39:11,720 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:11,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:11,720 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 27 times [2022-03-18 02:39:11,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:11,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [771039519] [2022-03-18 02:39:11,720 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:11,720 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 28 times [2022-03-18 02:39:11,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:11,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332668766] [2022-03-18 02:39:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:11,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:11,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:11,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051797170] [2022-03-18 02:39:11,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:39:11,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:11,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:11,727 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:39:11,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 02:39:11,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:39:11,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:11,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 02:39:11,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 148 proven. 33 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-03-18 02:39:11,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 44 proven. 45 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-03-18 02:39:12,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:12,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332668766] [2022-03-18 02:39:12,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:12,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051797170] [2022-03-18 02:39:12,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051797170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:12,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:12,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-18 02:39:12,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:12,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [771039519] [2022-03-18 02:39:12,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [771039519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:12,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:12,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:39:12,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502735446] [2022-03-18 02:39:12,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:12,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:39:12,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:12,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:39:12,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:39:12,358 INFO L87 Difference]: Start difference. First operand 365 states and 477 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:39:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:12,629 INFO L93 Difference]: Finished difference Result 415 states and 537 transitions. [2022-03-18 02:39:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:39:12,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-03-18 02:39:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:12,633 INFO L225 Difference]: With dead ends: 415 [2022-03-18 02:39:12,633 INFO L226 Difference]: Without dead ends: 337 [2022-03-18 02:39:12,634 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:39:12,634 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:12,634 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 260 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:39:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-03-18 02:39:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 307. [2022-03-18 02:39:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 182 states have (on average 1.098901098901099) internal successors, (200), 187 states have internal predecessors, (200), 90 states have call successors, (90), 35 states have call predecessors, (90), 34 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-03-18 02:39:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 379 transitions. [2022-03-18 02:39:12,760 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 379 transitions. Word has length 115 [2022-03-18 02:39:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:12,761 INFO L478 AbstractCegarLoop]: Abstraction has 307 states and 379 transitions. [2022-03-18 02:39:12,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:39:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 379 transitions. [2022-03-18 02:39:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 02:39:12,762 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:12,762 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:12,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-18 02:39:12,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-18 02:39:12,975 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:12,976 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 29 times [2022-03-18 02:39:12,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:12,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1241104968] [2022-03-18 02:39:12,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:12,976 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 30 times [2022-03-18 02:39:12,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:12,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312697259] [2022-03-18 02:39:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:12,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:12,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:12,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744136789] [2022-03-18 02:39:12,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:39:12,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:12,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:12,983 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:39:12,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 02:39:13,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:39:13,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:13,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 02:39:13,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 130 proven. 55 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-03-18 02:39:47,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 146 proven. 3 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-18 02:39:59,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:59,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312697259] [2022-03-18 02:39:59,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:59,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744136789] [2022-03-18 02:39:59,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744136789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:59,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:59,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 25 [2022-03-18 02:39:59,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:59,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1241104968] [2022-03-18 02:39:59,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1241104968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:59,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:59,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 02:39:59,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076677124] [2022-03-18 02:39:59,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:59,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 02:39:59,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:59,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 02:39:59,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-03-18 02:39:59,716 INFO L87 Difference]: Start difference. First operand 307 states and 379 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:40:03,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:40:11,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:11,032 INFO L93 Difference]: Finished difference Result 448 states and 571 transitions. [2022-03-18 02:40:11,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:40:11,033 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) Word has length 115 [2022-03-18 02:40:11,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:11,034 INFO L225 Difference]: With dead ends: 448 [2022-03-18 02:40:11,034 INFO L226 Difference]: Without dead ends: 326 [2022-03-18 02:40:11,035 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:40:11,035 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:11,035 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 277 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 406 Invalid, 0 Unknown, 15 Unchecked, 1.9s Time] [2022-03-18 02:40:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-18 02:40:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2022-03-18 02:40:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 189 states have (on average 1.0952380952380953) internal successors, (207), 192 states have internal predecessors, (207), 94 states have call successors, (94), 35 states have call predecessors, (94), 34 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2022-03-18 02:40:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 394 transitions. [2022-03-18 02:40:11,139 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 394 transitions. Word has length 115 [2022-03-18 02:40:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:11,139 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 394 transitions. [2022-03-18 02:40:11,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:40:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 394 transitions. [2022-03-18 02:40:11,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 02:40:11,140 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:11,140 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:40:11,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:11,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-18 02:40:11,345 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:11,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 31 times [2022-03-18 02:40:11,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:11,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945633525] [2022-03-18 02:40:11,350 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:11,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 32 times [2022-03-18 02:40:11,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:11,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196206440] [2022-03-18 02:40:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:11,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:11,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:11,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747451610] [2022-03-18 02:40:11,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:40:11,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:11,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:11,360 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:40:11,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 02:40:11,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:40:11,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:11,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-18 02:40:11,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:40:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 103 proven. 85 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-03-18 02:40:12,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:40:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-18 02:40:12,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:12,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196206440] [2022-03-18 02:40:12,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:12,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747451610] [2022-03-18 02:40:12,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747451610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:40:12,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:40:12,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-03-18 02:40:12,616 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:12,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945633525] [2022-03-18 02:40:12,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945633525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:12,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:12,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:40:12,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859216099] [2022-03-18 02:40:12,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:12,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:40:12,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:12,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:40:12,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:40:12,617 INFO L87 Difference]: Start difference. First operand 318 states and 394 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:40:13,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:13,059 INFO L93 Difference]: Finished difference Result 369 states and 448 transitions. [2022-03-18 02:40:13,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 02:40:13,059 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-03-18 02:40:13,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:13,060 INFO L225 Difference]: With dead ends: 369 [2022-03-18 02:40:13,061 INFO L226 Difference]: Without dead ends: 280 [2022-03-18 02:40:13,061 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:40:13,063 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:13,063 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 299 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:40:13,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-03-18 02:40:13,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-03-18 02:40:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 167 states have (on average 1.095808383233533) internal successors, (183), 169 states have internal predecessors, (183), 82 states have call successors, (82), 31 states have call predecessors, (82), 30 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-03-18 02:40:13,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 346 transitions. [2022-03-18 02:40:13,192 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 346 transitions. Word has length 115 [2022-03-18 02:40:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:13,193 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 346 transitions. [2022-03-18 02:40:13,194 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:40:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 346 transitions. [2022-03-18 02:40:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 02:40:13,194 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:13,195 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:40:13,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-18 02:40:13,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-18 02:40:13,409 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:13,409 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 33 times [2022-03-18 02:40:13,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:13,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1707713051] [2022-03-18 02:40:13,410 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:13,410 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 34 times [2022-03-18 02:40:13,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:13,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144780174] [2022-03-18 02:40:13,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:13,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:13,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:13,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208575340] [2022-03-18 02:40:13,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:40:13,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:13,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:13,420 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:40:13,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 02:40:13,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:40:13,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:13,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 02:40:13,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:40:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 145 proven. 36 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-03-18 02:40:13,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:40:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 47 proven. 42 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-03-18 02:40:14,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144780174] [2022-03-18 02:40:14,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:14,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208575340] [2022-03-18 02:40:14,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208575340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:40:14,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:40:14,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-18 02:40:14,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:14,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1707713051] [2022-03-18 02:40:14,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1707713051] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:14,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:14,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:40:14,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417899078] [2022-03-18 02:40:14,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:14,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:40:14,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:14,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:40:14,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:40:14,084 INFO L87 Difference]: Start difference. First operand 280 states and 346 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:40:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:14,376 INFO L93 Difference]: Finished difference Result 328 states and 408 transitions. [2022-03-18 02:40:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:40:14,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-03-18 02:40:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:14,378 INFO L225 Difference]: With dead ends: 328 [2022-03-18 02:40:14,378 INFO L226 Difference]: Without dead ends: 267 [2022-03-18 02:40:14,379 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-18 02:40:14,379 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:14,379 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 269 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:40:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-18 02:40:14,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-03-18 02:40:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 157 states have (on average 1.0955414012738853) internal successors, (172), 158 states have internal predecessors, (172), 83 states have call successors, (83), 27 states have call predecessors, (83), 26 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-18 02:40:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 337 transitions. [2022-03-18 02:40:14,497 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 337 transitions. Word has length 115 [2022-03-18 02:40:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:14,497 INFO L478 AbstractCegarLoop]: Abstraction has 267 states and 337 transitions. [2022-03-18 02:40:14,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:40:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 337 transitions. [2022-03-18 02:40:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 02:40:14,498 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:14,498 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:40:14,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:14,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 02:40:14,717 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 35 times [2022-03-18 02:40:14,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:14,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1294169369] [2022-03-18 02:40:14,717 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 36 times [2022-03-18 02:40:14,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:14,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15868587] [2022-03-18 02:40:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:14,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:14,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:14,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658130678] [2022-03-18 02:40:14,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:40:14,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:14,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:14,724 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:40:14,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 02:40:14,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:40:14,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:14,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 02:40:14,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:40:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-03-18 02:40:26,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:40:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-18 02:40:32,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:32,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15868587] [2022-03-18 02:40:32,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:32,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658130678] [2022-03-18 02:40:32,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658130678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:40:32,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:40:32,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-18 02:40:32,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:32,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1294169369] [2022-03-18 02:40:32,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1294169369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:32,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:32,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:40:32,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924750053] [2022-03-18 02:40:32,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:32,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:40:32,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:32,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:40:32,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=143, Unknown=3, NotChecked=0, Total=182 [2022-03-18 02:40:32,462 INFO L87 Difference]: Start difference. First operand 267 states and 337 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-18 02:40:34,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:40:36,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:40:43,860 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:40:45,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:40:48,700 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:40:50,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:40:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:50,936 INFO L93 Difference]: Finished difference Result 291 states and 360 transitions. [2022-03-18 02:40:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:40:50,938 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 115 [2022-03-18 02:40:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:50,941 INFO L225 Difference]: With dead ends: 291 [2022-03-18 02:40:50,941 INFO L226 Difference]: Without dead ends: 289 [2022-03-18 02:40:50,942 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=55, Invalid=214, Unknown=3, NotChecked=0, Total=272 [2022-03-18 02:40:50,942 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 7 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:50,942 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 311 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 273 Invalid, 4 Unknown, 0 Unchecked, 14.4s Time] [2022-03-18 02:40:50,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-03-18 02:40:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2022-03-18 02:40:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 170 states have (on average 1.088235294117647) internal successors, (185), 172 states have internal predecessors, (185), 86 states have call successors, (86), 31 states have call predecessors, (86), 30 states have return successors, (85), 83 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-18 02:40:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 356 transitions. [2022-03-18 02:40:51,037 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 356 transitions. Word has length 115 [2022-03-18 02:40:51,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:51,038 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 356 transitions. [2022-03-18 02:40:51,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-18 02:40:51,038 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 356 transitions. [2022-03-18 02:40:51,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-18 02:40:51,038 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:51,038 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:40:51,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:51,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:51,256 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:51,257 INFO L85 PathProgramCache]: Analyzing trace with hash 759132938, now seen corresponding path program 37 times [2022-03-18 02:40:51,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:51,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1471269822] [2022-03-18 02:40:51,257 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:51,257 INFO L85 PathProgramCache]: Analyzing trace with hash 759132938, now seen corresponding path program 38 times [2022-03-18 02:40:51,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:51,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904636758] [2022-03-18 02:40:51,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:51,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:51,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:51,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024985015] [2022-03-18 02:40:51,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:40:51,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:51,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:51,264 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:40:51,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 02:40:51,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:40:51,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:51,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 02:40:51,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:40:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 261 proven. 36 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-03-18 02:40:51,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:40:51,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:51,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904636758] [2022-03-18 02:40:51,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:51,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024985015] [2022-03-18 02:40:51,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024985015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:40:51,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:40:51,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 02:40:51,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:51,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1471269822] [2022-03-18 02:40:51,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1471269822] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:51,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:51,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:40:51,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627045521] [2022-03-18 02:40:51,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:51,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:40:51,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:51,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:40:51,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:40:51,833 INFO L87 Difference]: Start difference. First operand 287 states and 356 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-18 02:40:52,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:52,088 INFO L93 Difference]: Finished difference Result 385 states and 485 transitions. [2022-03-18 02:40:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:40:52,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2022-03-18 02:40:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:52,090 INFO L225 Difference]: With dead ends: 385 [2022-03-18 02:40:52,090 INFO L226 Difference]: Without dead ends: 281 [2022-03-18 02:40:52,091 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:40:52,091 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:52,091 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 303 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:40:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-18 02:40:52,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-03-18 02:40:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 167 states have (on average 1.0838323353293413) internal successors, (181), 169 states have internal predecessors, (181), 83 states have call successors, (83), 31 states have call predecessors, (83), 30 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-18 02:40:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 346 transitions. [2022-03-18 02:40:52,165 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 346 transitions. Word has length 128 [2022-03-18 02:40:52,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:52,165 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 346 transitions. [2022-03-18 02:40:52,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-18 02:40:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 346 transitions. [2022-03-18 02:40:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-18 02:40:52,166 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:52,166 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:40:52,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:52,368 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-18 02:40:52,368 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:52,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:52,369 INFO L85 PathProgramCache]: Analyzing trace with hash -980158838, now seen corresponding path program 39 times [2022-03-18 02:40:52,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:52,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [737300454] [2022-03-18 02:40:52,369 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:52,369 INFO L85 PathProgramCache]: Analyzing trace with hash -980158838, now seen corresponding path program 40 times [2022-03-18 02:40:52,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:52,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781756193] [2022-03-18 02:40:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:52,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:52,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:52,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306563377] [2022-03-18 02:40:52,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:40:52,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:52,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:52,377 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:40:52,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 02:40:52,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:40:52,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:52,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 02:40:52,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:40:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 126 proven. 48 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2022-03-18 02:40:52,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:40:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 50 proven. 66 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-18 02:40:53,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:53,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781756193] [2022-03-18 02:40:53,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:53,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306563377] [2022-03-18 02:40:53,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306563377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:40:53,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:40:53,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-03-18 02:40:53,105 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:53,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [737300454] [2022-03-18 02:40:53,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [737300454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:53,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:53,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:40:53,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018064618] [2022-03-18 02:40:53,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:53,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:40:53,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:53,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:40:53,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:40:53,107 INFO L87 Difference]: Start difference. First operand 281 states and 346 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 02:40:53,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:53,329 INFO L93 Difference]: Finished difference Result 409 states and 514 transitions. [2022-03-18 02:40:53,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:40:53,330 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 128 [2022-03-18 02:40:53,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:53,331 INFO L225 Difference]: With dead ends: 409 [2022-03-18 02:40:53,332 INFO L226 Difference]: Without dead ends: 287 [2022-03-18 02:40:53,332 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-03-18 02:40:53,332 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 18 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:53,333 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 305 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:40:53,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-18 02:40:53,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-03-18 02:40:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 170 states have (on average 1.0823529411764705) internal successors, (184), 172 states have internal predecessors, (184), 86 states have call successors, (86), 31 states have call predecessors, (86), 30 states have return successors, (85), 83 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-18 02:40:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 355 transitions. [2022-03-18 02:40:53,416 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 355 transitions. Word has length 128 [2022-03-18 02:40:53,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:53,416 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 355 transitions. [2022-03-18 02:40:53,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 02:40:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 355 transitions. [2022-03-18 02:40:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-18 02:40:53,417 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:53,417 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:40:53,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-18 02:40:53,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:53,650 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:53,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1822030639, now seen corresponding path program 41 times [2022-03-18 02:40:53,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:53,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [869962747] [2022-03-18 02:40:53,651 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:53,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1822030639, now seen corresponding path program 42 times [2022-03-18 02:40:53,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:53,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828167266] [2022-03-18 02:40:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:53,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:53,658 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:53,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706582549] [2022-03-18 02:40:53,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:40:53,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:53,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:53,676 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:40:53,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 02:40:53,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:40:53,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:53,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-18 02:40:53,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:40:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 158 proven. 84 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-18 02:40:54,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:40:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 165 proven. 8 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2022-03-18 02:40:54,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:54,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828167266] [2022-03-18 02:40:54,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:54,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706582549] [2022-03-18 02:40:54,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706582549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:40:54,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:40:54,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-18 02:40:54,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:54,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [869962747] [2022-03-18 02:40:54,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [869962747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:54,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:54,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:40:54,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272021600] [2022-03-18 02:40:54,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:54,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:40:54,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:54,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:40:54,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:40:54,217 INFO L87 Difference]: Start difference. First operand 287 states and 355 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-18 02:40:54,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:54,588 INFO L93 Difference]: Finished difference Result 287 states and 355 transitions. [2022-03-18 02:40:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:40:54,588 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 146 [2022-03-18 02:40:54,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:54,589 INFO L225 Difference]: With dead ends: 287 [2022-03-18 02:40:54,589 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 02:40:54,591 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:40:54,591 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:54,591 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 150 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:40:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 02:40:54,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 02:40:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 02:40:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 02:40:54,592 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 146 [2022-03-18 02:40:54,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:54,601 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 02:40:54,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-18 02:40:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 02:40:54,601 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 02:40:54,603 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 02:40:54,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:54,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:54,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 02:41:19,838 WARN L232 SmtUtils]: Spent 12.04s on a formula simplification. DAG size of input: 76 DAG size of output: 46 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 02:43:22,605 WARN L232 SmtUtils]: Spent 2.00m on a formula simplification. DAG size of input: 400 DAG size of output: 36 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 02:44:43,781 WARN L232 SmtUtils]: Spent 1.35m on a formula simplification. DAG size of input: 213 DAG size of output: 75 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 02:46:12,208 WARN L232 SmtUtils]: Spent 1.47m on a formula simplification. DAG size of input: 407 DAG size of output: 35 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 02:46:23,574 WARN L232 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 82 DAG size of output: 45 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 02:48:11,334 WARN L232 SmtUtils]: Spent 1.80m on a formula simplification. DAG size of input: 383 DAG size of output: 35 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)