/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/egcd2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 01:13:47,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 01:13:47,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 01:13:47,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 01:13:47,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 01:13:47,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 01:13:47,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 01:13:47,204 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 01:13:47,209 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 01:13:47,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 01:13:47,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 01:13:47,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 01:13:47,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 01:13:47,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 01:13:47,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 01:13:47,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 01:13:47,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 01:13:47,211 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 01:13:47,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 01:13:47,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 01:13:47,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 01:13:47,211 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 01:13:47,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 01:13:47,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:13:47,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 01:13:47,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 01:13:47,211 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 01:13:47,212 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 01:13:47,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 01:13:47,212 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 01:13:47,212 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 01:13:47,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 01:13:47,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 01:13:47,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 01:13:47,420 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 01:13:47,420 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 01:13:47,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2022-03-18 01:13:47,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81791454e/8c373b649c6d4834a57ed49c0c169648/FLAGce859e814 [2022-03-18 01:13:47,782 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 01:13:47,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2022-03-18 01:13:47,789 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81791454e/8c373b649c6d4834a57ed49c0c169648/FLAGce859e814 [2022-03-18 01:13:48,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81791454e/8c373b649c6d4834a57ed49c0c169648 [2022-03-18 01:13:48,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 01:13:48,207 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 01:13:48,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 01:13:48,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 01:13:48,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 01:13:48,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:13:48" (1/1) ... [2022-03-18 01:13:48,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ce8bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:48, skipping insertion in model container [2022-03-18 01:13:48,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:13:48" (1/1) ... [2022-03-18 01:13:48,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 01:13:48,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 01:13:48,396 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/egcd2-ll.c[490,503] [2022-03-18 01:13:48,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:13:48,446 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 01:13:48,454 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2-ll.c[490,503] [2022-03-18 01:13:48,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:13:48,481 INFO L208 MainTranslator]: Completed translation [2022-03-18 01:13:48,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:48 WrapperNode [2022-03-18 01:13:48,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 01:13:48,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 01:13:48,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 01:13:48,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 01:13:48,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:48" (1/1) ... [2022-03-18 01:13:48,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:48" (1/1) ... [2022-03-18 01:13:48,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:48" (1/1) ... [2022-03-18 01:13:48,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:48" (1/1) ... [2022-03-18 01:13:48,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:48" (1/1) ... [2022-03-18 01:13:48,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:48" (1/1) ... [2022-03-18 01:13:48,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:48" (1/1) ... [2022-03-18 01:13:48,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 01:13:48,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 01:13:48,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 01:13:48,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 01:13:48,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:48" (1/1) ... [2022-03-18 01:13:48,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:13:48,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:48,579 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 01:13:48,607 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 01:13:48,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 01:13:48,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 01:13:48,618 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 01:13:48,618 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 01:13:48,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 01:13:48,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 01:13:48,619 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 01:13:48,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 01:13:48,619 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 01:13:48,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 01:13:48,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 01:13:48,620 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 01:13:48,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 01:13:48,620 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 01:13:48,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 01:13:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 01:13:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 01:13:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 01:13:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 01:13:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 01:13:48,679 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 01:13:48,680 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 01:13:48,809 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 01:13:48,813 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 01:13:48,813 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 01:13:48,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:13:48 BoogieIcfgContainer [2022-03-18 01:13:48,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 01:13:48,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 01:13:48,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 01:13:48,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 01:13:48,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 01:13:48" (1/3) ... [2022-03-18 01:13:48,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf651c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:13:48, skipping insertion in model container [2022-03-18 01:13:48,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:48" (2/3) ... [2022-03-18 01:13:48,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf651c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:13:48, skipping insertion in model container [2022-03-18 01:13:48,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:13:48" (3/3) ... [2022-03-18 01:13:48,834 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2022-03-18 01:13:48,837 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 01:13:48,839 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 01:13:48,895 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 01:13:48,899 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 01:13:48,900 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 01:13:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 01:13:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 01:13:48,925 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:48,925 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] [2022-03-18 01:13:48,927 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:48,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:48,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1872307417, now seen corresponding path program 1 times [2022-03-18 01:13:48,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:48,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [453208154] [2022-03-18 01:13:48,952 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:48,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1872307417, now seen corresponding path program 2 times [2022-03-18 01:13:48,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:48,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167206246] [2022-03-18 01:13:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:48,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:49,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:13:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:49,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:13:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:49,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:13:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:49,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 01:13:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:49,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 01:13:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:49,098 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 01:13:49,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:49,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167206246] [2022-03-18 01:13:49,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167206246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:49,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:49,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 01:13:49,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:49,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [453208154] [2022-03-18 01:13:49,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [453208154] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:49,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:49,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 01:13:49,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843415216] [2022-03-18 01:13:49,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:49,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 01:13:49,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:49,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 01:13:49,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 01:13:49,135 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 01:13:49,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:49,240 INFO L93 Difference]: Finished difference Result 67 states and 106 transitions. [2022-03-18 01:13:49,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 01:13:49,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 32 [2022-03-18 01:13:49,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:49,246 INFO L225 Difference]: With dead ends: 67 [2022-03-18 01:13:49,247 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 01:13:49,250 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 01:13:49,254 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:49,255 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:13:49,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 01:13:49,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 01:13:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 01:13:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-18 01:13:49,292 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 32 [2022-03-18 01:13:49,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:49,293 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-18 01:13:49,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 01:13:49,293 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-18 01:13:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 01:13:49,295 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:49,295 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 01:13:49,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 01:13:49,296 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:49,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:49,298 INFO L85 PathProgramCache]: Analyzing trace with hash 310247117, now seen corresponding path program 1 times [2022-03-18 01:13:49,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:49,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [575910882] [2022-03-18 01:13:49,301 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:49,302 INFO L85 PathProgramCache]: Analyzing trace with hash 310247117, now seen corresponding path program 2 times [2022-03-18 01:13:49,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:49,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334861929] [2022-03-18 01:13:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:49,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:49,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:49,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942610474] [2022-03-18 01:13:49,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:49,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:49,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:49,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:13:49,391 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 01:13:49,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:13:49,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:49,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 01:13:49,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 01:13:49,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 01:13:49,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:49,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334861929] [2022-03-18 01:13:49,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:49,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942610474] [2022-03-18 01:13:49,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942610474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:49,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:49,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-18 01:13:49,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:49,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [575910882] [2022-03-18 01:13:49,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [575910882] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:49,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:49,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 01:13:49,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122827034] [2022-03-18 01:13:49,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:49,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 01:13:49,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:49,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 01:13:49,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 01:13:49,699 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 01:13:49,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:49,779 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-03-18 01:13:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 01:13:49,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-18 01:13:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:49,782 INFO L225 Difference]: With dead ends: 49 [2022-03-18 01:13:49,782 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 01:13:49,784 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:13:49,785 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:49,788 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 144 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:13:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 01:13:49,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-18 01:13:49,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 01:13:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-18 01:13:49,799 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 33 [2022-03-18 01:13:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:49,799 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-18 01:13:49,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 01:13:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-18 01:13:49,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 01:13:49,800 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:49,800 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, 1] [2022-03-18 01:13:49,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 01:13:50,000 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 01:13:50,001 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:50,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1036600877, now seen corresponding path program 1 times [2022-03-18 01:13:50,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:50,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [204421578] [2022-03-18 01:13:50,002 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:50,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1036600877, now seen corresponding path program 2 times [2022-03-18 01:13:50,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:50,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542415900] [2022-03-18 01:13:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:50,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:50,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:50,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205584037] [2022-03-18 01:13:50,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:50,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:50,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:50,028 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 01:13:50,029 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 01:13:50,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 01:13:50,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:50,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 01:13:50,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:50,122 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 01:13:50,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:13:50,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:50,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542415900] [2022-03-18 01:13:50,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:50,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205584037] [2022-03-18 01:13:50,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205584037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:50,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:50,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:13:50,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:50,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [204421578] [2022-03-18 01:13:50,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [204421578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:50,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:50,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:13:50,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252569389] [2022-03-18 01:13:50,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:50,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:13:50,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:50,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:13:50,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:13:50,125 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 01:13:50,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:50,155 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2022-03-18 01:13:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:13:50,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 34 [2022-03-18 01:13:50,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:50,157 INFO L225 Difference]: With dead ends: 47 [2022-03-18 01:13:50,157 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 01:13:50,157 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 01:13:50,158 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:50,158 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 143 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:13:50,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 01:13:50,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-03-18 01:13:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 01:13:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-03-18 01:13:50,164 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 34 [2022-03-18 01:13:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:50,165 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-03-18 01:13:50,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 01:13:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-03-18 01:13:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 01:13:50,165 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:50,165 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, 1] [2022-03-18 01:13:50,184 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 01:13:50,380 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 01:13:50,380 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:50,381 INFO L85 PathProgramCache]: Analyzing trace with hash -844413996, now seen corresponding path program 1 times [2022-03-18 01:13:50,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:50,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [662816367] [2022-03-18 01:13:50,381 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:50,381 INFO L85 PathProgramCache]: Analyzing trace with hash -844413996, now seen corresponding path program 2 times [2022-03-18 01:13:50,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:50,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893662629] [2022-03-18 01:13:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:50,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:50,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:50,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624880422] [2022-03-18 01:13:50,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:50,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:50,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:50,413 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 01:13:50,414 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 01:13:50,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:13:50,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:50,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 01:13:50,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 01:13:50,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:50,649 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 01:13:50,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:50,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893662629] [2022-03-18 01:13:50,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:50,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624880422] [2022-03-18 01:13:50,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624880422] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 01:13:50,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:13:50,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-18 01:13:50,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:50,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [662816367] [2022-03-18 01:13:50,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [662816367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:50,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:50,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:13:50,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753336328] [2022-03-18 01:13:50,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:50,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:13:50,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:13:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:13:50,652 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 01:13:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:50,679 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-03-18 01:13:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:13:50,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 39 [2022-03-18 01:13:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:50,681 INFO L225 Difference]: With dead ends: 55 [2022-03-18 01:13:50,681 INFO L226 Difference]: Without dead ends: 53 [2022-03-18 01:13:50,681 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 01:13:50,682 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:50,682 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 153 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:13:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-18 01:13:50,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-18 01:13:50,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 01:13:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-03-18 01:13:50,690 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 39 [2022-03-18 01:13:50,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:50,690 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-03-18 01:13:50,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 01:13:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-03-18 01:13:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 01:13:50,691 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:50,691 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, 1] [2022-03-18 01:13:50,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 01:13:50,912 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 01:13:50,912 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:50,913 INFO L85 PathProgramCache]: Analyzing trace with hash -644493747, now seen corresponding path program 1 times [2022-03-18 01:13:50,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:50,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1529703064] [2022-03-18 01:13:50,913 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:50,913 INFO L85 PathProgramCache]: Analyzing trace with hash -644493747, now seen corresponding path program 2 times [2022-03-18 01:13:50,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:50,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763273564] [2022-03-18 01:13:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:50,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:50,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:50,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242974551] [2022-03-18 01:13:50,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:50,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:50,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:50,936 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 01:13:50,937 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 01:13:50,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:13:50,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:50,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 01:13:50,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 01:13:51,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:51,205 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 01:13:51,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:51,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763273564] [2022-03-18 01:13:51,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:51,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242974551] [2022-03-18 01:13:51,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242974551] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 01:13:51,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:13:51,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-18 01:13:51,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:51,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1529703064] [2022-03-18 01:13:51,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1529703064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:51,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:51,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:13:51,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711696717] [2022-03-18 01:13:51,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:51,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:13:51,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:51,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:13:51,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:13:51,208 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 01:13:51,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:51,239 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-03-18 01:13:51,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:13:51,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-18 01:13:51,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:51,240 INFO L225 Difference]: With dead ends: 59 [2022-03-18 01:13:51,240 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 01:13:51,240 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 01:13:51,241 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 144 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 01:13:51,241 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:13:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 01:13:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-03-18 01:13:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 01:13:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-03-18 01:13:51,256 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 44 [2022-03-18 01:13:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:51,256 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-03-18 01:13:51,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 01:13:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-03-18 01:13:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 01:13:51,257 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:51,257 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 01:13:51,276 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 01:13:51,476 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 01:13:51,476 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:51,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:51,476 INFO L85 PathProgramCache]: Analyzing trace with hash -79102156, now seen corresponding path program 1 times [2022-03-18 01:13:51,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:51,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [259782697] [2022-03-18 01:13:51,477 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:51,477 INFO L85 PathProgramCache]: Analyzing trace with hash -79102156, now seen corresponding path program 2 times [2022-03-18 01:13:51,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:51,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936705635] [2022-03-18 01:13:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:51,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:51,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:51,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782014422] [2022-03-18 01:13:51,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:51,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:51,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:51,487 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 01:13:51,488 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 01:13:51,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:13:51,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:51,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 01:13:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 01:13:51,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:51,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:51,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936705635] [2022-03-18 01:13:51,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:51,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782014422] [2022-03-18 01:13:51,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782014422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:13:51,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:13:51,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-18 01:13:51,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:51,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [259782697] [2022-03-18 01:13:51,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [259782697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:51,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:51,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 01:13:51,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242027445] [2022-03-18 01:13:51,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:51,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 01:13:51,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:51,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 01:13:51,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:13:51,765 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:13:51,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:51,838 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-03-18 01:13:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 01:13:51,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-03-18 01:13:51,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:51,839 INFO L225 Difference]: With dead ends: 63 [2022-03-18 01:13:51,839 INFO L226 Difference]: Without dead ends: 61 [2022-03-18 01:13:51,839 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-18 01:13:51,840 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:51,840 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:13:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-18 01:13:51,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-03-18 01:13:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 01:13:51,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-03-18 01:13:51,848 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 49 [2022-03-18 01:13:51,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:51,848 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-03-18 01:13:51,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:13:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-03-18 01:13:51,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 01:13:51,849 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:51,849 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:51,869 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 01:13:52,065 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 01:13:52,066 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:52,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:52,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2126113716, now seen corresponding path program 1 times [2022-03-18 01:13:52,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:52,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2129091050] [2022-03-18 01:13:52,067 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2126113716, now seen corresponding path program 2 times [2022-03-18 01:13:52,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:52,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96062937] [2022-03-18 01:13:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:52,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:52,077 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:52,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021157070] [2022-03-18 01:13:52,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:52,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:52,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:52,079 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 01:13:52,081 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 01:13:52,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:13:52,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:52,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 01:13:52,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 01:13:52,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 01:13:52,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:52,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96062937] [2022-03-18 01:13:52,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:52,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021157070] [2022-03-18 01:13:52,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021157070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:52,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:52,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-18 01:13:52,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:52,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2129091050] [2022-03-18 01:13:52,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2129091050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:52,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:52,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 01:13:52,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264517116] [2022-03-18 01:13:52,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:52,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 01:13:52,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:52,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 01:13:52,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 01:13:52,346 INFO L87 Difference]: Start difference. First operand 60 states and 72 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 01:13:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:52,418 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2022-03-18 01:13:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 01:13:52,419 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-18 01:13:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:52,420 INFO L225 Difference]: With dead ends: 88 [2022-03-18 01:13:52,420 INFO L226 Difference]: Without dead ends: 86 [2022-03-18 01:13:52,420 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 01:13:52,421 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:52,421 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 204 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:13:52,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-18 01:13:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-03-18 01:13:52,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 01:13:52,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-03-18 01:13:52,441 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 56 [2022-03-18 01:13:52,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:52,441 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-03-18 01:13:52,441 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 01:13:52,441 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-03-18 01:13:52,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 01:13:52,442 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:52,442 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:52,471 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 01:13:52,671 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 01:13:52,672 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:52,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1051433450, now seen corresponding path program 1 times [2022-03-18 01:13:52,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:52,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1147602696] [2022-03-18 01:13:52,673 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:52,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1051433450, now seen corresponding path program 2 times [2022-03-18 01:13:52,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:52,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183057607] [2022-03-18 01:13:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:52,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:52,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:52,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810837905] [2022-03-18 01:13:52,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:52,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:52,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:52,681 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 01:13:52,682 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 01:13:52,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:13:52,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:52,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 01:13:52,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-18 01:13:52,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-18 01:13:52,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:52,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183057607] [2022-03-18 01:13:52,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:52,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810837905] [2022-03-18 01:13:52,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810837905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:52,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:52,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 01:13:52,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:52,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1147602696] [2022-03-18 01:13:52,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1147602696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:52,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:52,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:13:52,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778610460] [2022-03-18 01:13:52,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:52,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:13:52,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:52,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:13:52,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:13:52,978 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 01:13:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:53,072 INFO L93 Difference]: Finished difference Result 121 states and 167 transitions. [2022-03-18 01:13:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 01:13:53,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2022-03-18 01:13:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:53,075 INFO L225 Difference]: With dead ends: 121 [2022-03-18 01:13:53,075 INFO L226 Difference]: Without dead ends: 113 [2022-03-18 01:13:53,075 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-18 01:13:53,075 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:53,076 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 316 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:13:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-18 01:13:53,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2022-03-18 01:13:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 58 states have internal predecessors, (64), 39 states have call successors, (39), 9 states have call predecessors, (39), 8 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-18 01:13:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2022-03-18 01:13:53,106 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 58 [2022-03-18 01:13:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:53,106 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2022-03-18 01:13:53,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 01:13:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2022-03-18 01:13:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 01:13:53,109 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:53,110 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, 1, 1, 1] [2022-03-18 01:13:53,135 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 01:13:53,336 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 01:13:53,336 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:53,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:53,337 INFO L85 PathProgramCache]: Analyzing trace with hash 998199389, now seen corresponding path program 1 times [2022-03-18 01:13:53,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:53,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [814531471] [2022-03-18 01:13:53,337 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:53,337 INFO L85 PathProgramCache]: Analyzing trace with hash 998199389, now seen corresponding path program 2 times [2022-03-18 01:13:53,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:53,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864185545] [2022-03-18 01:13:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:53,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:53,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:53,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726877880] [2022-03-18 01:13:53,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:53,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:53,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:53,345 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 01:13:53,347 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 01:13:53,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:13:53,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:53,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 01:13:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 01:13:53,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 01:13:53,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:53,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864185545] [2022-03-18 01:13:53,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:53,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726877880] [2022-03-18 01:13:53,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726877880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:53,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:53,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-18 01:13:53,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:53,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [814531471] [2022-03-18 01:13:53,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [814531471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:53,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:53,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:13:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282787383] [2022-03-18 01:13:53,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:53,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:13:53,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:13:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-18 01:13:53,715 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 01:13:53,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:53,833 INFO L93 Difference]: Finished difference Result 147 states and 208 transitions. [2022-03-18 01:13:53,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 01:13:53,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2022-03-18 01:13:53,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:53,835 INFO L225 Difference]: With dead ends: 147 [2022-03-18 01:13:53,835 INFO L226 Difference]: Without dead ends: 144 [2022-03-18 01:13:53,835 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-18 01:13:53,836 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:53,836 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 215 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:13:53,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-18 01:13:53,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-03-18 01:13:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 80 states have internal predecessors, (88), 58 states have call successors, (58), 10 states have call predecessors, (58), 9 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 01:13:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 201 transitions. [2022-03-18 01:13:53,852 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 201 transitions. Word has length 64 [2022-03-18 01:13:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:53,852 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 201 transitions. [2022-03-18 01:13:53,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 01:13:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 201 transitions. [2022-03-18 01:13:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 01:13:53,853 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:53,853 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:53,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 01:13:54,072 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 01:13:54,073 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:54,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:54,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1412509540, now seen corresponding path program 3 times [2022-03-18 01:13:54,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:54,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2026776586] [2022-03-18 01:13:54,074 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:54,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1412509540, now seen corresponding path program 4 times [2022-03-18 01:13:54,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:54,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757195813] [2022-03-18 01:13:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:54,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:54,080 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:54,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914662257] [2022-03-18 01:13:54,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:13:54,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:54,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:54,082 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 01:13:54,095 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 01:13:54,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:13:54,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:54,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 01:13:54,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-03-18 01:13:54,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 01:13:54,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:54,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757195813] [2022-03-18 01:13:54,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:54,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914662257] [2022-03-18 01:13:54,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914662257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:54,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:54,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-03-18 01:13:54,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:54,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2026776586] [2022-03-18 01:13:54,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2026776586] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:54,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:54,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 01:13:54,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351480685] [2022-03-18 01:13:54,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:54,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 01:13:54,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:54,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 01:13:54,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-18 01:13:54,735 INFO L87 Difference]: Start difference. First operand 141 states and 201 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-18 01:13:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:54,951 INFO L93 Difference]: Finished difference Result 153 states and 211 transitions. [2022-03-18 01:13:54,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 01:13:54,951 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 69 [2022-03-18 01:13:54,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:54,953 INFO L225 Difference]: With dead ends: 153 [2022-03-18 01:13:54,953 INFO L226 Difference]: Without dead ends: 151 [2022-03-18 01:13:54,953 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-18 01:13:54,954 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 30 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:54,954 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 292 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:13:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-18 01:13:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2022-03-18 01:13:54,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 86 states have internal predecessors, (94), 58 states have call successors, (58), 12 states have call predecessors, (58), 11 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 01:13:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2022-03-18 01:13:54,970 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 69 [2022-03-18 01:13:54,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:54,970 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2022-03-18 01:13:54,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-18 01:13:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2022-03-18 01:13:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 01:13:54,971 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:54,971 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:54,989 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 01:13:55,187 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 01:13:55,188 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1763593091, now seen corresponding path program 5 times [2022-03-18 01:13:55,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:55,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1507592721] [2022-03-18 01:13:55,189 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:55,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1763593091, now seen corresponding path program 6 times [2022-03-18 01:13:55,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:55,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894158834] [2022-03-18 01:13:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:55,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:55,195 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:55,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876209646] [2022-03-18 01:13:55,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:13:55,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:55,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:55,197 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 01:13:55,198 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 01:13:55,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 01:13:55,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:55,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 01:13:55,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 01:13:55,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:55,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:55,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894158834] [2022-03-18 01:13:55,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:55,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876209646] [2022-03-18 01:13:55,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876209646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:13:55,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:13:55,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 01:13:55,663 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:55,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1507592721] [2022-03-18 01:13:55,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1507592721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:55,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:55,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 01:13:55,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080395767] [2022-03-18 01:13:55,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:55,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 01:13:55,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:55,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 01:13:55,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-18 01:13:55,664 INFO L87 Difference]: Start difference. First operand 149 states and 207 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 01:13:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:55,933 INFO L93 Difference]: Finished difference Result 161 states and 217 transitions. [2022-03-18 01:13:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 01:13:55,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2022-03-18 01:13:55,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:55,968 INFO L225 Difference]: With dead ends: 161 [2022-03-18 01:13:55,968 INFO L226 Difference]: Without dead ends: 159 [2022-03-18 01:13:55,969 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-18 01:13:55,969 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 22 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:55,969 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 292 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:13:55,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-18 01:13:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-03-18 01:13:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 92 states have internal predecessors, (100), 58 states have call successors, (58), 14 states have call predecessors, (58), 13 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 01:13:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 213 transitions. [2022-03-18 01:13:55,991 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 213 transitions. Word has length 74 [2022-03-18 01:13:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:55,991 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 213 transitions. [2022-03-18 01:13:55,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 01:13:55,991 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 213 transitions. [2022-03-18 01:13:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-18 01:13:55,992 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:55,992 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:56,009 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 01:13:56,207 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 01:13:56,207 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:56,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1525288661, now seen corresponding path program 3 times [2022-03-18 01:13:56,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:56,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1076127167] [2022-03-18 01:13:56,208 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:56,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1525288661, now seen corresponding path program 4 times [2022-03-18 01:13:56,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:56,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181083514] [2022-03-18 01:13:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:56,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:56,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:56,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089020614] [2022-03-18 01:13:56,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:13:56,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:56,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:56,216 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 01:13:56,217 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 01:13:56,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:13:56,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:56,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 01:13:56,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-18 01:13:56,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-18 01:13:56,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:56,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181083514] [2022-03-18 01:13:56,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:56,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089020614] [2022-03-18 01:13:56,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089020614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:56,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:56,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 16 [2022-03-18 01:13:56,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:56,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1076127167] [2022-03-18 01:13:56,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1076127167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:56,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:56,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 01:13:56,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052478143] [2022-03-18 01:13:56,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:56,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 01:13:56,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:56,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 01:13:56,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-18 01:13:56,748 INFO L87 Difference]: Start difference. First operand 157 states and 213 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 01:13:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:57,218 INFO L93 Difference]: Finished difference Result 179 states and 242 transitions. [2022-03-18 01:13:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 01:13:57,219 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2022-03-18 01:13:57,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:57,220 INFO L225 Difference]: With dead ends: 179 [2022-03-18 01:13:57,220 INFO L226 Difference]: Without dead ends: 177 [2022-03-18 01:13:57,221 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-18 01:13:57,221 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:57,221 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 296 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 01:13:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-18 01:13:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2022-03-18 01:13:57,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 100 states have internal predecessors, (109), 62 states have call successors, (62), 16 states have call predecessors, (62), 15 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-18 01:13:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 230 transitions. [2022-03-18 01:13:57,238 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 230 transitions. Word has length 78 [2022-03-18 01:13:57,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:57,239 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 230 transitions. [2022-03-18 01:13:57,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 01:13:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 230 transitions. [2022-03-18 01:13:57,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 01:13:57,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:57,239 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:57,263 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 01:13:57,464 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 01:13:57,464 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash 815826741, now seen corresponding path program 1 times [2022-03-18 01:13:57,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:57,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1699579299] [2022-03-18 01:13:57,465 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:57,465 INFO L85 PathProgramCache]: Analyzing trace with hash 815826741, now seen corresponding path program 2 times [2022-03-18 01:13:57,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:57,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804202852] [2022-03-18 01:13:57,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:57,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:57,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:57,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078101190] [2022-03-18 01:13:57,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:57,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:57,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:57,474 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 01:13:57,475 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 01:13:57,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:13:57,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:57,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 01:13:57,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 44 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-18 01:13:58,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-18 01:13:59,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:59,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804202852] [2022-03-18 01:13:59,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:59,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078101190] [2022-03-18 01:13:59,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078101190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:59,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:59,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-18 01:13:59,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:59,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1699579299] [2022-03-18 01:13:59,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1699579299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:59,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:59,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 01:13:59,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253805787] [2022-03-18 01:13:59,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:59,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 01:13:59,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:59,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 01:13:59,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-18 01:13:59,494 INFO L87 Difference]: Start difference. First operand 171 states and 230 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 01:14:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:00,117 INFO L93 Difference]: Finished difference Result 196 states and 266 transitions. [2022-03-18 01:14:00,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 01:14:00,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-18 01:14:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:00,118 INFO L225 Difference]: With dead ends: 196 [2022-03-18 01:14:00,118 INFO L226 Difference]: Without dead ends: 193 [2022-03-18 01:14:00,119 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-03-18 01:14:00,120 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 27 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:00,120 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 339 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 01:14:00,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-18 01:14:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-03-18 01:14:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 112 states have internal predecessors, (122), 71 states have call successors, (71), 17 states have call predecessors, (71), 16 states have return successors, (68), 62 states have call predecessors, (68), 68 states have call successors, (68) [2022-03-18 01:14:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 261 transitions. [2022-03-18 01:14:00,145 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 261 transitions. Word has length 80 [2022-03-18 01:14:00,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:00,145 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 261 transitions. [2022-03-18 01:14:00,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 01:14:00,145 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 261 transitions. [2022-03-18 01:14:00,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 01:14:00,147 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:00,147 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:00,174 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 01:14:00,374 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 01:14:00,374 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:00,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:00,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1902002164, now seen corresponding path program 7 times [2022-03-18 01:14:00,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:00,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1981340626] [2022-03-18 01:14:00,375 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1902002164, now seen corresponding path program 8 times [2022-03-18 01:14:00,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:00,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372397834] [2022-03-18 01:14:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:00,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:00,381 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:00,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407528738] [2022-03-18 01:14:00,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:14:00,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:00,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:00,383 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 01:14:00,384 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 01:14:00,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:14:00,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:00,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 01:14:00,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-03-18 01:14:00,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:14:00,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:00,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372397834] [2022-03-18 01:14:00,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:00,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407528738] [2022-03-18 01:14:00,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407528738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:00,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:00,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:14:00,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:00,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1981340626] [2022-03-18 01:14:00,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1981340626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:00,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:00,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:14:00,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244284978] [2022-03-18 01:14:00,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:00,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:14:00,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:00,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:14:00,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:14:00,543 INFO L87 Difference]: Start difference. First operand 192 states and 261 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-18 01:14:00,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:00,597 INFO L93 Difference]: Finished difference Result 234 states and 319 transitions. [2022-03-18 01:14:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 01:14:00,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 89 [2022-03-18 01:14:00,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:00,599 INFO L225 Difference]: With dead ends: 234 [2022-03-18 01:14:00,599 INFO L226 Difference]: Without dead ends: 175 [2022-03-18 01:14:00,603 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 01:14:00,603 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:00,603 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 168 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:14:00,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-18 01:14:00,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 166. [2022-03-18 01:14:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 91 states have (on average 1.10989010989011) internal successors, (101), 98 states have internal predecessors, (101), 58 states have call successors, (58), 17 states have call predecessors, (58), 16 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 01:14:00,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 214 transitions. [2022-03-18 01:14:00,624 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 214 transitions. Word has length 89 [2022-03-18 01:14:00,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:00,624 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 214 transitions. [2022-03-18 01:14:00,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-18 01:14:00,625 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 214 transitions. [2022-03-18 01:14:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-18 01:14:00,626 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:00,626 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:00,643 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 01:14:00,832 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 01:14:00,832 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1738688612, now seen corresponding path program 1 times [2022-03-18 01:14:00,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:00,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1696740119] [2022-03-18 01:14:00,833 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1738688612, now seen corresponding path program 2 times [2022-03-18 01:14:00,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:00,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155928612] [2022-03-18 01:14:00,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:00,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:00,839 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:00,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927020903] [2022-03-18 01:14:00,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:14:00,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:00,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:00,844 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 01:14:00,845 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 01:14:00,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:14:00,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:00,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 01:14:00,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 96 proven. 28 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-03-18 01:14:01,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:05,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:05,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155928612] [2022-03-18 01:14:05,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:05,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927020903] [2022-03-18 01:14:05,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927020903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:14:05,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:14:05,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-18 01:14:05,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:05,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1696740119] [2022-03-18 01:14:05,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1696740119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:05,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:05,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 01:14:05,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998790615] [2022-03-18 01:14:05,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:05,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 01:14:05,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 01:14:05,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=234, Unknown=1, NotChecked=0, Total=306 [2022-03-18 01:14:05,551 INFO L87 Difference]: Start difference. First operand 166 states and 214 transitions. Second operand has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 01:14:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:06,220 INFO L93 Difference]: Finished difference Result 181 states and 226 transitions. [2022-03-18 01:14:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 01:14:06,222 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 96 [2022-03-18 01:14:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:06,223 INFO L225 Difference]: With dead ends: 181 [2022-03-18 01:14:06,223 INFO L226 Difference]: Without dead ends: 179 [2022-03-18 01:14:06,223 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=112, Invalid=393, Unknown=1, NotChecked=0, Total=506 [2022-03-18 01:14:06,223 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 26 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:06,224 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 404 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 01:14:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-18 01:14:06,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-03-18 01:14:06,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 100 states have (on average 1.1) internal successors, (110), 107 states have internal predecessors, (110), 58 states have call successors, (58), 20 states have call predecessors, (58), 19 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 01:14:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 223 transitions. [2022-03-18 01:14:06,240 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 223 transitions. Word has length 96 [2022-03-18 01:14:06,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:06,240 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 223 transitions. [2022-03-18 01:14:06,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 01:14:06,240 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 223 transitions. [2022-03-18 01:14:06,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-18 01:14:06,241 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:06,241 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:06,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-18 01:14:06,474 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 01:14:06,474 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:06,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:06,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1265808182, now seen corresponding path program 5 times [2022-03-18 01:14:06,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:06,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [543240502] [2022-03-18 01:14:06,475 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:06,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1265808182, now seen corresponding path program 6 times [2022-03-18 01:14:06,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:06,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479385196] [2022-03-18 01:14:06,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:06,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:06,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:06,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670271274] [2022-03-18 01:14:06,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:14:06,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:06,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:06,485 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 01:14:06,489 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 01:14:06,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-18 01:14:06,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:06,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 01:14:06,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-18 01:14:06,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 01:14:06,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:06,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479385196] [2022-03-18 01:14:06,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:06,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670271274] [2022-03-18 01:14:06,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670271274] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 01:14:06,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:14:06,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-18 01:14:06,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:06,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [543240502] [2022-03-18 01:14:06,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [543240502] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:06,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:06,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:14:06,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775434241] [2022-03-18 01:14:06,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:06,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:14:06,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:06,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:14:06,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:14:06,941 INFO L87 Difference]: Start difference. First operand 178 states and 223 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 01:14:06,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:06,978 INFO L93 Difference]: Finished difference Result 184 states and 228 transitions. [2022-03-18 01:14:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:14:06,978 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 100 [2022-03-18 01:14:06,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:06,979 INFO L225 Difference]: With dead ends: 184 [2022-03-18 01:14:06,979 INFO L226 Difference]: Without dead ends: 182 [2022-03-18 01:14:06,979 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 188 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 01:14:06,980 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:06,980 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 126 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:14:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-18 01:14:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-03-18 01:14:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 110 states have internal predecessors, (113), 58 states have call successors, (58), 21 states have call predecessors, (58), 20 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 01:14:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 226 transitions. [2022-03-18 01:14:06,996 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 226 transitions. Word has length 100 [2022-03-18 01:14:06,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:06,997 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 226 transitions. [2022-03-18 01:14:06,997 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 01:14:06,997 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 226 transitions. [2022-03-18 01:14:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-18 01:14:06,998 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:06,998 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 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, 1, 1] [2022-03-18 01:14:07,016 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 01:14:07,214 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 01:14:07,214 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1068463892, now seen corresponding path program 3 times [2022-03-18 01:14:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:07,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [942290180] [2022-03-18 01:14:07,215 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1068463892, now seen corresponding path program 4 times [2022-03-18 01:14:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:07,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189049532] [2022-03-18 01:14:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:07,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:07,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:07,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537051922] [2022-03-18 01:14:07,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:14:07,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:07,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:07,230 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 01:14:07,230 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 01:14:07,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:14:07,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:07,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 01:14:07,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:07,689 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:14:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 55 proven. 49 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-03-18 01:14:07,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:08,293 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:14:08,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:08,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189049532] [2022-03-18 01:14:08,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:08,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537051922] [2022-03-18 01:14:08,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537051922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:14:08,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:14:08,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-18 01:14:08,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:08,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [942290180] [2022-03-18 01:14:08,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [942290180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:08,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:08,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 01:14:08,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188889818] [2022-03-18 01:14:08,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:08,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 01:14:08,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:08,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 01:14:08,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-18 01:14:08,627 INFO L87 Difference]: Start difference. First operand 182 states and 226 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-18 01:14:09,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:09,212 INFO L93 Difference]: Finished difference Result 211 states and 269 transitions. [2022-03-18 01:14:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 01:14:09,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) Word has length 102 [2022-03-18 01:14:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:09,214 INFO L225 Difference]: With dead ends: 211 [2022-03-18 01:14:09,214 INFO L226 Difference]: Without dead ends: 208 [2022-03-18 01:14:09,214 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-03-18 01:14:09,214 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:09,214 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 413 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:14:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-18 01:14:09,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-03-18 01:14:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 115 states have (on average 1.1043478260869566) internal successors, (127), 122 states have internal predecessors, (127), 70 states have call successors, (70), 22 states have call predecessors, (70), 21 states have return successors, (67), 62 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-18 01:14:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 264 transitions. [2022-03-18 01:14:09,235 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 264 transitions. Word has length 102 [2022-03-18 01:14:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:09,236 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 264 transitions. [2022-03-18 01:14:09,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-18 01:14:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 264 transitions. [2022-03-18 01:14:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-18 01:14:09,236 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:09,237 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:09,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-18 01:14:09,453 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 01:14:09,453 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash 351496396, now seen corresponding path program 5 times [2022-03-18 01:14:09,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:09,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [943544476] [2022-03-18 01:14:09,454 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash 351496396, now seen corresponding path program 6 times [2022-03-18 01:14:09,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:09,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258378536] [2022-03-18 01:14:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:09,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:09,460 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:09,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631228974] [2022-03-18 01:14:09,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:14:09,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:09,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:09,461 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 01:14:09,462 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 01:14:09,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 01:14:09,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:09,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 01:14:09,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-18 01:14:09,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-18 01:14:09,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:09,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258378536] [2022-03-18 01:14:09,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:09,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631228974] [2022-03-18 01:14:09,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631228974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:14:09,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:14:09,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-18 01:14:09,807 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:09,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [943544476] [2022-03-18 01:14:09,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [943544476] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:09,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:09,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 01:14:09,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424069454] [2022-03-18 01:14:09,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:09,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 01:14:09,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:09,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 01:14:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 01:14:09,808 INFO L87 Difference]: Start difference. First operand 207 states and 264 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-03-18 01:14:09,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:09,983 INFO L93 Difference]: Finished difference Result 257 states and 349 transitions. [2022-03-18 01:14:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 01:14:09,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2022-03-18 01:14:09,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:09,986 INFO L225 Difference]: With dead ends: 257 [2022-03-18 01:14:09,986 INFO L226 Difference]: Without dead ends: 249 [2022-03-18 01:14:09,986 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-18 01:14:09,987 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 14 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:09,987 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 329 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:14:09,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-18 01:14:10,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 230. [2022-03-18 01:14:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 125 states have internal predecessors, (140), 85 states have call successors, (85), 22 states have call predecessors, (85), 21 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-18 01:14:10,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 307 transitions. [2022-03-18 01:14:10,015 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 307 transitions. Word has length 105 [2022-03-18 01:14:10,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:10,015 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 307 transitions. [2022-03-18 01:14:10,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-03-18 01:14:10,015 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 307 transitions. [2022-03-18 01:14:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-18 01:14:10,036 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:10,036 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-18 01:14:10,055 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 01:14:10,252 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 01:14:10,253 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:10,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:10,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2080181613, now seen corresponding path program 3 times [2022-03-18 01:14:10,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:10,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [566008078] [2022-03-18 01:14:10,254 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:10,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2080181613, now seen corresponding path program 4 times [2022-03-18 01:14:10,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:10,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25411322] [2022-03-18 01:14:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:10,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:10,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:10,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375854446] [2022-03-18 01:14:10,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:14:10,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:10,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:10,261 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 01:14:10,274 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 01:14:10,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:14:10,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:10,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 01:14:10,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 55 proven. 50 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-03-18 01:14:12,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-18 01:14:13,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:13,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25411322] [2022-03-18 01:14:13,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:13,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375854446] [2022-03-18 01:14:13,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375854446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:14:13,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:14:13,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 22 [2022-03-18 01:14:13,106 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:13,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [566008078] [2022-03-18 01:14:13,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [566008078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:13,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:13,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 01:14:13,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683788984] [2022-03-18 01:14:13,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:13,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 01:14:13,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 01:14:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-18 01:14:13,107 INFO L87 Difference]: Start difference. First operand 230 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-18 01:14:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:16,071 INFO L93 Difference]: Finished difference Result 260 states and 350 transitions. [2022-03-18 01:14:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 01:14:16,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 111 [2022-03-18 01:14:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:16,073 INFO L225 Difference]: With dead ends: 260 [2022-03-18 01:14:16,073 INFO L226 Difference]: Without dead ends: 258 [2022-03-18 01:14:16,081 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-03-18 01:14:16,081 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 42 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:16,082 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 510 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 01:14:16,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-03-18 01:14:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2022-03-18 01:14:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 137 states have internal predecessors, (154), 97 states have call successors, (97), 23 states have call predecessors, (97), 22 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-18 01:14:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 345 transitions. [2022-03-18 01:14:16,118 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 345 transitions. Word has length 111 [2022-03-18 01:14:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:16,118 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 345 transitions. [2022-03-18 01:14:16,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-18 01:14:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 345 transitions. [2022-03-18 01:14:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 01:14:16,120 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:16,120 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-18 01:14:16,136 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 01:14:16,329 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 01:14:16,330 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:16,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:16,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1295483154, now seen corresponding path program 5 times [2022-03-18 01:14:16,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:16,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1616451183] [2022-03-18 01:14:16,331 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:16,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1295483154, now seen corresponding path program 6 times [2022-03-18 01:14:16,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:16,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462476763] [2022-03-18 01:14:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:16,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:16,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:16,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239412576] [2022-03-18 01:14:16,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:14:16,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:16,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:16,340 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 01:14:16,344 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 01:14:16,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 01:14:16,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:16,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-18 01:14:16,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 129 proven. 56 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 01:14:19,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:16:17,792 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~yy~0_BEFORE_CALL_39 Int) (v_main_~x~0_BEFORE_CALL_151 Int) (v_main_~y~0_BEFORE_CALL_157 Int) (v_main_~s~0_BEFORE_CALL_123 Int) (v_main_~q~0_BEFORE_CALL_120 Int) (v_main_~xy~0_BEFORE_CALL_29 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_157 (+ (* v_main_~y~0_BEFORE_CALL_157 v_main_~s~0_BEFORE_CALL_123) (* v_main_~x~0_BEFORE_CALL_151 v_main_~q~0_BEFORE_CALL_120))))) (let ((.cse1 (+ .cse0 (* (- 1) v_main_~yy~0_BEFORE_CALL_39 v_main_~s~0_BEFORE_CALL_123)))) (or (not (= (+ (* (- 1) .cse0) (* v_main_~yy~0_BEFORE_CALL_39 v_main_~s~0_BEFORE_CALL_123) (* v_main_~xy~0_BEFORE_CALL_29 v_main_~q~0_BEFORE_CALL_120)) 0)) (= (mod .cse1 v_main_~q~0_BEFORE_CALL_120) 0) (= .cse1 0))))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-03-18 01:16:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 137 proven. 38 refuted. 5 times theorem prover too weak. 272 trivial. 1 not checked. [2022-03-18 01:16:19,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:16:19,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462476763] [2022-03-18 01:16:19,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:16:19,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239412576] [2022-03-18 01:16:19,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239412576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:16:19,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:16:19,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2022-03-18 01:16:19,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:16:19,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1616451183] [2022-03-18 01:16:19,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1616451183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:16:19,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:16:19,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 01:16:19,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526058711] [2022-03-18 01:16:19,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:16:19,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 01:16:19,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:16:19,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 01:16:19,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=642, Unknown=8, NotChecked=52, Total=812 [2022-03-18 01:16:19,528 INFO L87 Difference]: Start difference. First operand 255 states and 345 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 01:16:31,033 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 01:16:31,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:16:31,752 INFO L93 Difference]: Finished difference Result 280 states and 365 transitions. [2022-03-18 01:16:31,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 01:16:31,764 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 116 [2022-03-18 01:16:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:16:31,766 INFO L225 Difference]: With dead ends: 280 [2022-03-18 01:16:31,766 INFO L226 Difference]: Without dead ends: 278 [2022-03-18 01:16:31,766 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=186, Invalid=1138, Unknown=12, NotChecked=70, Total=1406 [2022-03-18 01:16:31,768 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 36 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:16:31,768 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 572 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 728 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-03-18 01:16:31,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-03-18 01:16:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 275. [2022-03-18 01:16:31,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 150 states have (on average 1.1266666666666667) internal successors, (169), 152 states have internal predecessors, (169), 97 states have call successors, (97), 28 states have call predecessors, (97), 27 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-18 01:16:31,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 360 transitions. [2022-03-18 01:16:31,808 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 360 transitions. Word has length 116 [2022-03-18 01:16:31,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:16:31,809 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 360 transitions. [2022-03-18 01:16:31,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 01:16:31,809 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 360 transitions. [2022-03-18 01:16:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-18 01:16:31,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:16:31,810 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:16:31,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-18 01:16:32,027 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 01:16:32,027 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:16:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:16:32,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1515779717, now seen corresponding path program 7 times [2022-03-18 01:16:32,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:16:32,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [658960028] [2022-03-18 01:16:32,028 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:16:32,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1515779717, now seen corresponding path program 8 times [2022-03-18 01:16:32,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:16:32,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009245569] [2022-03-18 01:16:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:16:32,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:16:32,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:16:32,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854634756] [2022-03-18 01:16:32,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:16:32,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:16:32,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:16:32,040 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 01:16:32,041 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 01:16:32,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:16:32,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:16:32,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-18 01:16:32,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:16:33,681 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 153 proven. 83 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-03-18 01:16:34,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:16:35,557 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:51,888 WARN L232 SmtUtils]: Spent 11.39s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 01:16:51,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:16:51,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009245569] [2022-03-18 01:16:51,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:16:51,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854634756] [2022-03-18 01:16:51,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854634756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:16:51,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:16:51,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-18 01:16:51,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:16:51,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [658960028] [2022-03-18 01:16:51,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [658960028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:16:51,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:16:51,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 01:16:51,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68546523] [2022-03-18 01:16:51,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:16:51,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 01:16:51,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:16:51,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 01:16:51,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-03-18 01:16:51,891 INFO L87 Difference]: Start difference. First operand 275 states and 360 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, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-18 01:16:53,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:16:53,336 INFO L93 Difference]: Finished difference Result 287 states and 370 transitions. [2022-03-18 01:16:53,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 01:16:53,337 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, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 118 [2022-03-18 01:16:53,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:16:53,338 INFO L225 Difference]: With dead ends: 287 [2022-03-18 01:16:53,338 INFO L226 Difference]: Without dead ends: 285 [2022-03-18 01:16:53,339 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-03-18 01:16:53,339 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:16:53,339 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 392 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 01:16:53,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-18 01:16:53,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2022-03-18 01:16:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 156 states have (on average 1.1217948717948718) internal successors, (175), 158 states have internal predecessors, (175), 97 states have call successors, (97), 30 states have call predecessors, (97), 29 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-18 01:16:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 366 transitions. [2022-03-18 01:16:53,396 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 366 transitions. Word has length 118 [2022-03-18 01:16:53,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:16:53,396 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 366 transitions. [2022-03-18 01:16:53,396 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, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-18 01:16:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 366 transitions. [2022-03-18 01:16:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 01:16:53,397 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:16:53,397 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:16:53,416 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 01:16:53,614 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 01:16:53,614 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:16:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:16:53,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2030078771, now seen corresponding path program 9 times [2022-03-18 01:16:53,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:16:53,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2085088761] [2022-03-18 01:16:53,615 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:16:53,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2030078771, now seen corresponding path program 10 times [2022-03-18 01:16:53,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:16:53,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217243126] [2022-03-18 01:16:53,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:16:53,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:16:53,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:16:53,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186398042] [2022-03-18 01:16:53,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:16:53,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:16:53,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:16:53,625 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 01:16:53,627 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 01:16:53,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:16:53,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:16:53,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-18 01:16:53,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:16:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 109 proven. 111 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-03-18 01:16:54,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:16:58,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:16:58,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217243126] [2022-03-18 01:16:58,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:16:58,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186398042] [2022-03-18 01:16:58,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186398042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:16:58,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:16:58,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 01:16:58,561 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:16:58,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2085088761] [2022-03-18 01:16:58,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2085088761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:16:58,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:16:58,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 01:16:58,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062333175] [2022-03-18 01:16:58,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:16:58,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 01:16:58,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:16:58,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 01:16:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=334, Unknown=1, NotChecked=0, Total=420 [2022-03-18 01:16:58,562 INFO L87 Difference]: Start difference. First operand 283 states and 366 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-18 01:16:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:16:59,343 INFO L93 Difference]: Finished difference Result 300 states and 380 transitions. [2022-03-18 01:16:59,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 01:16:59,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) Word has length 121 [2022-03-18 01:16:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:16:59,345 INFO L225 Difference]: With dead ends: 300 [2022-03-18 01:16:59,346 INFO L226 Difference]: Without dead ends: 298 [2022-03-18 01:16:59,346 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=134, Invalid=567, Unknown=1, NotChecked=0, Total=702 [2022-03-18 01:16:59,346 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 31 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:16:59,346 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 514 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 01:16:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-18 01:16:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 295. [2022-03-18 01:16:59,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 165 states have (on average 1.1151515151515152) internal successors, (184), 167 states have internal predecessors, (184), 97 states have call successors, (97), 33 states have call predecessors, (97), 32 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-18 01:16:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 375 transitions. [2022-03-18 01:16:59,399 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 375 transitions. Word has length 121 [2022-03-18 01:16:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:16:59,400 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 375 transitions. [2022-03-18 01:16:59,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-18 01:16:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 375 transitions. [2022-03-18 01:16:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-18 01:16:59,402 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:16:59,402 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:16:59,421 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 01:16:59,615 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 01:16:59,615 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:16:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:16:59,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1602594227, now seen corresponding path program 7 times [2022-03-18 01:16:59,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:16:59,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1773808776] [2022-03-18 01:16:59,616 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:16:59,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1602594227, now seen corresponding path program 8 times [2022-03-18 01:16:59,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:16:59,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111483937] [2022-03-18 01:16:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:16:59,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:16:59,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:16:59,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085170733] [2022-03-18 01:16:59,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:16:59,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:16:59,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:16:59,628 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 01:16:59,629 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 01:16:59,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:16:59,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:16:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 01:16:59,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:17:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 67 proven. 57 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-03-18 01:17:01,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:17:02,338 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:17:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 67 proven. 48 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-18 01:17:09,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:17:09,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111483937] [2022-03-18 01:17:09,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:17:09,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085170733] [2022-03-18 01:17:09,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085170733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:17:09,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:17:09,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2022-03-18 01:17:09,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:17:09,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1773808776] [2022-03-18 01:17:09,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1773808776] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:17:09,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:17:09,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 01:17:09,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702165857] [2022-03-18 01:17:09,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:17:09,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 01:17:09,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:17:09,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 01:17:09,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=637, Unknown=3, NotChecked=0, Total=756 [2022-03-18 01:17:09,983 INFO L87 Difference]: Start difference. First operand 295 states and 375 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 01:17:11,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:17:11,790 INFO L93 Difference]: Finished difference Result 331 states and 430 transitions. [2022-03-18 01:17:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 01:17:11,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 124 [2022-03-18 01:17:11,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:17:11,792 INFO L225 Difference]: With dead ends: 331 [2022-03-18 01:17:11,792 INFO L226 Difference]: Without dead ends: 328 [2022-03-18 01:17:11,794 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=176, Invalid=943, Unknown=3, NotChecked=0, Total=1122 [2022-03-18 01:17:11,797 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 49 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:17:11,797 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 332 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 01:17:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-18 01:17:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 326. [2022-03-18 01:17:11,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 179 states have (on average 1.1229050279329609) internal successors, (201), 181 states have internal predecessors, (201), 113 states have call successors, (113), 34 states have call predecessors, (113), 33 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) [2022-03-18 01:17:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 424 transitions. [2022-03-18 01:17:11,840 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 424 transitions. Word has length 124 [2022-03-18 01:17:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:17:11,840 INFO L478 AbstractCegarLoop]: Abstraction has 326 states and 424 transitions. [2022-03-18 01:17:11,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 01:17:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 424 transitions. [2022-03-18 01:17:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 01:17:11,841 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:17:11,841 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:17:11,861 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 01:17:12,055 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 01:17:12,055 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:17:12,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:17:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1787495061, now seen corresponding path program 9 times [2022-03-18 01:17:12,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:17:12,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1796092155] [2022-03-18 01:17:12,056 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:17:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1787495061, now seen corresponding path program 10 times [2022-03-18 01:17:12,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:17:12,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061795484] [2022-03-18 01:17:12,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:17:12,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:17:12,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:17:12,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421706681] [2022-03-18 01:17:12,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:17:12,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:17:12,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:17:12,065 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 01:17:12,067 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 01:17:12,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:17:12,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:17:12,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 01:17:12,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:17:15,276 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:17:15,278 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:17:15,280 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:17:15,282 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:17:15,288 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:17:15,290 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:17:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 165 proven. 84 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-18 01:17:16,021 INFO L328 TraceCheckSpWp]: Computing backward predicates...